MCP Server 2.0 (#452)

* MCP Server 2.0

- Updated application version from 2.23.14 to 2.24.0 in package.json.
- MCP Server improved with new features
- Migrated functionality from Dev Tools to MCP Server
- Improved getMonitoringProvider not to crash application when misconfigured

.claude/commands/feature-builder.md

@@ -55,11 +55,13 @@ create policy "projects_write" on public.projects for all
 
 Use `server-action-builder` skill for detailed patterns.
 
+**Rule: Services are decoupled from interfaces.** The service is pure logic that receives dependencies (database client, etc.) as arguments — it never imports framework-specific modules. The server action is a thin adapter that resolves dependencies and calls the service. This means the same service can be called from a server action, an MCP tool, a CLI command, or a unit test with zero changes.
+
 Create in route's `_lib/server/` directory:
 
 1. **Schema** (`_lib/schemas/feature.schema.ts`)
-2. **Service** (`_lib/server/feature.service.ts`)
+2. **Service** (`_lib/server/feature.service.ts`) — pure logic, dependencies injected, testable in isolation
-3. **Actions** (`_lib/server/server-actions.ts`)
+3. **Actions** (`_lib/server/server-actions.ts`) — thin adapter, no business logic
 
 ### Phase 3: UI Components
 
@@ -148,7 +150,9 @@ apps/web/app/home/[account]/projects/
 ### Server Layer
 
 - [ ] Zod schema in `_lib/schemas/`
-- [ ] Service class in `_lib/server/`
+- [ ] Service class in `_lib/server/` with dependencies injected (not imported)
+- [ ] Service contains all business logic — testable with mock dependencies
+- [ ] Server actions are thin adapters — resolve dependencies, call service, handle revalidation
 - [ ] Server actions use `enhanceAction`
 - [ ] Actions have `auth: true` and `schema` options
 - [ ] Logging added for operations

.claude/skills/server-action-builder/SKILL.md

@@ -29,22 +29,24 @@ export type CreateFeatureInput = z.infer<typeof CreateFeatureSchema>;
 
 ### Step 2: Create Service Layer
 
+**North star: services are decoupled from their interface.** The service is pure logic — it receives a database client as a dependency, never imports one. This means the same service works whether called from a server action, an MCP tool, a CLI command, or a plain unit test.
+
 Create service in `_lib/server/`:
 
 ```typescript
 // _lib/server/feature.service.ts
-import { getSupabaseServerClient } from '@kit/supabase/server-client';
+import type { SupabaseClient } from '@supabase/supabase-js';
 import type { CreateFeatureInput } from '../schemas/feature.schema';
 
-export function createFeatureService() {
+export function createFeatureService(client: SupabaseClient) {
-  return new FeatureService();
+  return new FeatureService(client);
 }
 
 class FeatureService {
-  async create(data: CreateFeatureInput) {
+  constructor(private readonly client: SupabaseClient) {}
-    const client = getSupabaseServerClient();
 
-    const { data: result, error } = await client
+  async create(data: CreateFeatureInput) {
+    const { data: result, error } = await this.client
       .from('features')
       .insert({
         name: data.name,
@@ -60,7 +62,11 @@ class FeatureService {
 }
 ```
 
-### Step 3: Create Server Action
+The service never calls `getSupabaseServerClient()` — the caller provides the client. This keeps the service testable (pass a mock client) and reusable (any interface can supply its own client).
+
+### Step 3: Create Server Action (Thin Adapter)
+
+The action is a **thin adapter** — it resolves dependencies (client, logger) and delegates to the service. No business logic lives here.
 
 Create action in `_lib/server/server-actions.ts`:
 
@@ -69,6 +75,7 @@ Create action in `_lib/server/server-actions.ts`:
 
 import { enhanceAction } from '@kit/next/actions';
 import { getLogger } from '@kit/shared/logger';
+import { getSupabaseServerClient } from '@kit/supabase/server-client';
 import { revalidatePath } from 'next/cache';
 
 import { CreateFeatureSchema } from '../schemas/feature.schema';
@@ -81,7 +88,8 @@ export const createFeatureAction = enhanceAction(
 
     logger.info(ctx, 'Creating feature');
 
-    const service = createFeatureService();
+    const client = getSupabaseServerClient();
+    const service = createFeatureService(client);
     const result = await service.create(data);
 
     logger.info({ ...ctx, featureId: result.id }, 'Feature created');
@@ -99,11 +107,13 @@ export const createFeatureAction = enhanceAction(
 
 ## Key Patterns
 
-1. **Schema in separate file** - Reusable between client and server
+1. **Services are pure, interfaces are thin adapters.** The service contains all business logic. The server action (or MCP tool, or CLI command) is glue code that resolves dependencies and calls the service. If an MCP tool and a server action do the same thing, they call the same service function.
-2. **Service layer** - Business logic isolated from action
+2. **Inject dependencies, don't import them in services.** Services receive their database client, logger, or any I/O capability as constructor arguments — never by importing framework-specific modules. This keeps them testable with stubs and reusable across interfaces.
-3. **Logging** - Always log before and after operations
+3. **Schema in separate file** - Reusable between client and server
-4. **Revalidation** - Use `revalidatePath` after mutations
+4. **Logging** - Always log before and after operations
-5. **Trust RLS** - Don't add manual auth checks (RLS handles it)
+5. **Revalidation** - Use `revalidatePath` after mutations
+6. **Trust RLS** - Don't add manual auth checks (RLS handles it)
+7. **Testable in isolation** - Because services accept their dependencies, you can test them with a mock client and no running infrastructure
 
 ## File Structure
 

.claude/skills/service-builder/SKILL.md

@@ -0,0 +1,308 @@
+---
+name: service-builder
+description: Build pure, interface-agnostic services with injected dependencies. Use when creating business logic that must work across server actions, MCP tools, CLI commands, or tests. Invoke with /service-builder.
+---
+
+# Service Builder
+
+You are an expert at building pure, testable services that are decoupled from their callers.
+
+## North Star
+
+**Every service is decoupled from its interface (I/O).** A service takes plain data in, does work, and returns plain data out. It has no knowledge of whether it was called from an MCP tool, a server action, a CLI command, a route handler, or a test. The caller is a thin adapter that resolves dependencies and delegates.
+
+## Workflow
+
+When asked to create a service, follow these steps:
+
+### Step 1: Define the Contract
+
+Start with the input/output types. These are plain TypeScript — no framework types.
+
+```typescript
+// _lib/schemas/project.schema.ts
+import { z } from 'zod';
+
+export const CreateProjectSchema = z.object({
+  name: z.string().min(1),
+  accountId: z.string().uuid(),
+});
+
+export type CreateProjectInput = z.infer<typeof CreateProjectSchema>;
+
+export interface Project {
+  id: string;
+  name: string;
+  account_id: string;
+  created_at: string;
+}
+```
+
+### Step 2: Build the Service
+
+The service receives all dependencies through its constructor. It never imports framework-specific modules (`getSupabaseServerClient`, `getLogger`, `revalidatePath`, etc.).
+
+```typescript
+// _lib/server/project.service.ts
+import type { SupabaseClient } from '@supabase/supabase-js';
+
+import type { CreateProjectInput, Project } from '../schemas/project.schema';
+
+export function createProjectService(client: SupabaseClient) {
+  return new ProjectService(client);
+}
+
+class ProjectService {
+  constructor(private readonly client: SupabaseClient) {}
+
+  async create(data: CreateProjectInput): Promise<Project> {
+    const { data: result, error } = await this.client
+      .from('projects')
+      .insert({
+        name: data.name,
+        account_id: data.accountId,
+      })
+      .select()
+      .single();
+
+    if (error) throw error;
+
+    return result;
+  }
+
+  async list(accountId: string): Promise<Project[]> {
+    const { data, error } = await this.client
+      .from('projects')
+      .select('*')
+      .eq('account_id', accountId)
+      .order('created_at', { ascending: false });
+
+    if (error) throw error;
+
+    return data;
+  }
+
+  async delete(projectId: string): Promise<void> {
+    const { error } = await this.client
+      .from('projects')
+      .delete()
+      .eq('id', projectId);
+
+    if (error) throw error;
+  }
+}
+```
+
+### Step 3: Write Thin Adapters
+
+Each interface is a thin adapter — it resolves dependencies, calls the service, and handles interface-specific concerns (revalidation, redirects, MCP formatting, CLI output).
+
+**Server Action adapter:**
+
+```typescript
+// _lib/server/server-actions.ts
+'use server';
+
+import { enhanceAction } from '@kit/next/actions';
+import { getLogger } from '@kit/shared/logger';
+import { getSupabaseServerClient } from '@kit/supabase/server-client';
+import { revalidatePath } from 'next/cache';
+
+import { CreateProjectSchema } from '../schemas/project.schema';
+import { createProjectService } from './project.service';
+
+export const createProjectAction = enhanceAction(
+  async function (data, user) {
+    const logger = await getLogger();
+    logger.info({ name: 'create-project', userId: user.id }, 'Creating project');
+
+    const client = getSupabaseServerClient();
+    const service = createProjectService(client);
+    const result = await service.create(data);
+
+    revalidatePath('/home/[account]/projects');
+
+    return { success: true, data: result };
+  },
+  {
+    auth: true,
+    schema: CreateProjectSchema,
+  },
+);
+```
+
+**Route Handler adapter:**
+
+```typescript
+// app/api/projects/route.ts
+import { enhanceRouteHandler } from '@kit/next/routes';
+import { getSupabaseServerClient } from '@kit/supabase/server-client';
+import { NextResponse } from 'next/server';
+
+import { CreateProjectSchema } from '../_lib/schemas/project.schema';
+import { createProjectService } from '../_lib/server/project.service';
+
+export const POST = enhanceRouteHandler(
+  async function ({ body, user }) {
+    const client = getSupabaseServerClient();
+    const service = createProjectService(client);
+    const result = await service.create(body);
+
+    return NextResponse.json(result);
+  },
+  {
+    auth: true,
+    schema: CreateProjectSchema,
+  },
+);
+```
+
+**MCP Tool adapter:**
+
+```typescript
+// mcp/tools/kit_project_create.ts
+import { createProjectService } from '../../_lib/server/project.service';
+
+export const kit_project_create: McpToolHandler = async (input, context) => {
+  const client = context.getSupabaseClient();
+  const service = createProjectService(client);
+
+  return service.create(input);
+};
+```
+
+### Step 4: Write Tests
+
+Because the service accepts dependencies, you can test it with stubs — no running database, no framework runtime.
+
+```typescript
+// _lib/server/__tests__/project.service.test.ts
+import { describe, it, expect, vi } from 'vitest';
+
+import { createProjectService } from '../project.service';
+
+function createMockClient(overrides: Record<string, unknown> = {}) {
+  const mockChain = {
+    insert: vi.fn().mockReturnThis(),
+    select: vi.fn().mockReturnThis(),
+    single: vi.fn().mockResolvedValue({
+      data: { id: 'proj-1', name: 'Test', account_id: 'acc-1', created_at: new Date().toISOString() },
+      error: null,
+    }),
+    delete: vi.fn().mockReturnThis(),
+    eq: vi.fn().mockReturnThis(),
+    order: vi.fn().mockResolvedValue({ data: [], error: null }),
+    ...overrides,
+  };
+
+  return {
+    from: vi.fn(() => mockChain),
+    mockChain,
+  } as unknown as SupabaseClient;
+}
+
+describe('ProjectService', () => {
+  it('creates a project', async () => {
+    const client = createMockClient();
+    const service = createProjectService(client);
+
+    const result = await service.create({
+      name: 'Test Project',
+      accountId: 'acc-1',
+    });
+
+    expect(result.id).toBe('proj-1');
+    expect(client.from).toHaveBeenCalledWith('projects');
+  });
+
+  it('throws on database error', async () => {
+    const client = createMockClient({
+      single: vi.fn().mockResolvedValue({
+        data: null,
+        error: { message: 'unique violation' },
+      }),
+    });
+
+    const service = createProjectService(client);
+
+    await expect(
+      service.create({ name: 'Dup', accountId: 'acc-1' }),
+    ).rejects.toEqual({ message: 'unique violation' });
+  });
+});
+```
+
+## Rules
+
+1. **Services are pure functions over data.** Plain objects/primitives in, plain objects/primitives out. No `Request`/`Response`, no MCP context, no `FormData`.
+
+2. **Inject dependencies, never import them.** The service receives its database client, storage client, or any I/O capability as a constructor argument. Never call `getSupabaseServerClient()` inside a service.
+
+3. **Adapters are trivial glue.** A server action resolves the client, calls the service, and handles `revalidatePath`. An MCP tool resolves the client, calls the service, and formats the response. No business logic in adapters.
+
+4. **One service, many callers.** If two interfaces do the same thing, they call the same service function. Duplicating logic is a violation.
+
+5. **Testable in isolation.** Pass a mock client, assert the output. If you need a running database to test a service, refactor until you don't.
+
+## What Goes Where
+
+| Concern | Location | Example |
+|---------|----------|---------|
+| Input validation (Zod) | `_lib/schemas/` | `CreateProjectSchema` |
+| Business logic | `_lib/server/*.service.ts` | `ProjectService.create()` |
+| Auth check | Adapter (`enhanceAction({ auth: true })`) | Server action wrapper |
+| Logging | Adapter | `logger.info()` before/after service call |
+| Cache revalidation | Adapter | `revalidatePath()` after mutation |
+| Redirect | Adapter | `redirect()` after creation |
+| MCP response format | Adapter | Return service result as MCP content |
+
+## File Structure
+
+```
+feature/
+├── _lib/
+│   ├── schemas/
+│   │   └── feature.schema.ts       # Zod schemas + TS types
+│   └── server/
+│       ├── feature.service.ts       # Pure service (dependencies injected)
+│       ├── server-actions.ts        # Server action adapters
+│       └── __tests__/
+│           └── feature.service.test.ts  # Unit tests with mock client
+└── _components/
+    └── feature-form.tsx
+```
+
+## Anti-Patterns
+
+```typescript
+// ❌ BAD: Service imports framework-specific client
+class ProjectService {
+  async create(data: CreateProjectInput) {
+    const client = getSupabaseServerClient(); // coupling!
+    // ...
+  }
+}
+
+// ❌ BAD: Business logic in the adapter
+export const createProjectAction = enhanceAction(
+  async function (data, user) {
+    const client = getSupabaseServerClient();
+    // Business logic directly in the action — not reusable
+    if (data.name.length > 100) throw new Error('Name too long');
+    const { data: result } = await client.from('projects').insert(data);
+    return result;
+  },
+  { auth: true, schema: CreateProjectSchema },
+);
+
+// ❌ BAD: Two interfaces duplicate the same logic
+// server-actions.ts
+const result = await client.from('projects').insert(...).select().single();
+// mcp-tool.ts
+const result = await client.from('projects').insert(...).select().single();
+// Should be: both call projectService.create()
+```
+
+## Reference
+
+See `[Examples](examples.md)` for more patterns including services with multiple dependencies, services that compose other services, and testing strategies.

.claude/skills/service-builder/examples.md

@@ -0,0 +1,273 @@
+# Service Builder Examples
+
+## Service with Multiple Dependencies
+
+When a service needs more than just a database client, inject all dependencies.
+
+```typescript
+// _lib/server/invoice.service.ts
+import type { SupabaseClient } from '@supabase/supabase-js';
+
+interface InvoiceServiceDeps {
+  client: SupabaseClient;
+  storage: SupabaseClient['storage'];
+}
+
+export function createInvoiceService(deps: InvoiceServiceDeps) {
+  return new InvoiceService(deps);
+}
+
+class InvoiceService {
+  constructor(private readonly deps: InvoiceServiceDeps) {}
+
+  async generatePdf(invoiceId: string): Promise<{ url: string }> {
+    const { data: invoice, error } = await this.deps.client
+      .from('invoices')
+      .select('*')
+      .eq('id', invoiceId)
+      .single();
+
+    if (error) throw error;
+
+    const pdf = this.buildPdf(invoice);
+
+    const { data: upload, error: uploadError } = await this.deps.storage
+      .from('invoices')
+      .upload(`${invoiceId}.pdf`, pdf);
+
+    if (uploadError) throw uploadError;
+
+    return { url: upload.path };
+  }
+
+  private buildPdf(invoice: Record<string, unknown>): Uint8Array {
+    // Pure logic — no I/O
+    // ...
+    return new Uint8Array();
+  }
+}
+```
+
+**Server action adapter:**
+
+```typescript
+'use server';
+
+import { enhanceAction } from '@kit/next/actions';
+import { getSupabaseServerClient } from '@kit/supabase/server-client';
+
+import { GenerateInvoiceSchema } from '../schemas/invoice.schema';
+import { createInvoiceService } from './invoice.service';
+
+export const generateInvoicePdfAction = enhanceAction(
+  async function (data, user) {
+    const client = getSupabaseServerClient();
+    const service = createInvoiceService({
+      client,
+      storage: client.storage,
+    });
+
+    return service.generatePdf(data.invoiceId);
+  },
+  { auth: true, schema: GenerateInvoiceSchema },
+);
+```
+
+## Service Composing Other Services
+
+Services can depend on other services — compose at the adapter level.
+
+```typescript
+// _lib/server/onboarding.service.ts
+import type { ProjectService } from './project.service';
+import type { NotificationService } from './notification.service';
+
+interface OnboardingServiceDeps {
+  projects: ProjectService;
+  notifications: NotificationService;
+}
+
+export function createOnboardingService(deps: OnboardingServiceDeps) {
+  return new OnboardingService(deps);
+}
+
+class OnboardingService {
+  constructor(private readonly deps: OnboardingServiceDeps) {}
+
+  async onboardAccount(params: { accountId: string; accountName: string }) {
+    // Create default project
+    const project = await this.deps.projects.create({
+      name: `${params.accountName}'s First Project`,
+      accountId: params.accountId,
+    });
+
+    // Send welcome notification
+    await this.deps.notifications.send({
+      accountId: params.accountId,
+      type: 'welcome',
+      data: { projectId: project.id },
+    });
+
+    return { project };
+  }
+}
+```
+
+**Adapter composes the dependency tree:**
+
+```typescript
+'use server';
+
+import { getSupabaseServerClient } from '@kit/supabase/server-client';
+
+import { createOnboardingService } from './onboarding.service';
+import { createProjectService } from './project.service';
+import { createNotificationService } from './notification.service';
+
+export const onboardAccountAction = enhanceAction(
+  async function (data, user) {
+    const client = getSupabaseServerClient();
+
+    const service = createOnboardingService({
+      projects: createProjectService(client),
+      notifications: createNotificationService(client),
+    });
+
+    return service.onboardAccount(data);
+  },
+  { auth: true, schema: OnboardAccountSchema },
+);
+```
+
+## Pure Validation Service (No I/O)
+
+Some services are entirely pure — they don't even need a database client.
+
+```typescript
+// _lib/server/pricing.service.ts
+
+interface PricingInput {
+  plan: 'starter' | 'pro' | 'enterprise';
+  seats: number;
+  billingPeriod: 'monthly' | 'yearly';
+}
+
+interface PricingResult {
+  unitPrice: number;
+  total: number;
+  discount: number;
+  currency: string;
+}
+
+export function calculatePricing(input: PricingInput): PricingResult {
+  const basePrices = { starter: 900, pro: 2900, enterprise: 9900 };
+  const unitPrice = basePrices[input.plan];
+  const yearlyDiscount = input.billingPeriod === 'yearly' ? 0.2 : 0;
+  const seatDiscount = input.seats >= 10 ? 0.1 : 0;
+  const discount = Math.min(yearlyDiscount + seatDiscount, 0.3);
+  const total = Math.round(unitPrice * input.seats * (1 - discount));
+
+  return { unitPrice, total, discount, currency: 'usd' };
+}
+```
+
+This is the simplest case — a plain function, no class, no dependencies. Trivially testable:
+
+```typescript
+import { calculatePricing } from '../pricing.service';
+
+it('applies yearly discount', () => {
+  const result = calculatePricing({
+    plan: 'pro',
+    seats: 1,
+    billingPeriod: 'yearly',
+  });
+
+  expect(result.discount).toBe(0.2);
+  expect(result.total).toBe(2320); // 2900 * 0.8
+});
+```
+
+## Testing with Mock Client
+
+Full mock pattern for Supabase client:
+
+```typescript
+import { vi } from 'vitest';
+import type { SupabaseClient } from '@supabase/supabase-js';
+
+/**
+ * Creates a chainable mock that mimics Supabase's query builder.
+ * Override any method in the chain via the `overrides` param.
+ */
+export function createMockSupabaseClient(
+  resolvedValue: { data: unknown; error: unknown } = { data: null, error: null },
+  overrides: Record<string, unknown> = {},
+) {
+  const chain: Record<string, ReturnType<typeof vi.fn>> = {};
+
+  // Every method returns `this` (chainable) by default
+  const methods = [
+    'select', 'insert', 'update', 'upsert', 'delete',
+    'eq', 'neq', 'gt', 'gte', 'lt', 'lte', 'in',
+    'like', 'ilike', 'is', 'order', 'limit', 'range',
+    'single', 'maybeSingle',
+  ];
+
+  for (const method of methods) {
+    chain[method] = vi.fn().mockReturnThis();
+  }
+
+  // Terminal methods resolve with data
+  chain.single = vi.fn().mockResolvedValue(resolvedValue);
+  chain.maybeSingle = vi.fn().mockResolvedValue(resolvedValue);
+
+  // Apply overrides
+  for (const [key, value] of Object.entries(overrides)) {
+    chain[key] = vi.fn().mockImplementation(
+      typeof value === 'function' ? value : () => value,
+    );
+  }
+
+  // Non-terminal chains that don't end with single/maybeSingle
+  // resolve when awaited via .then()
+  const proxyHandler: ProxyHandler<typeof chain> = {
+    get(target, prop) {
+      if (prop === 'then') {
+        return (resolve: (v: unknown) => void) => resolve(resolvedValue);
+      }
+      return target[prop as string] ?? vi.fn().mockReturnValue(target);
+    },
+  };
+
+  const chainProxy = new Proxy(chain, proxyHandler);
+
+  return {
+    from: vi.fn(() => chainProxy),
+    chain,
+  } as unknown as SupabaseClient & { chain: typeof chain };
+}
+```
+
+Usage:
+
+```typescript
+import { createMockSupabaseClient } from '../test-utils';
+import { createProjectService } from '../project.service';
+
+it('lists projects for an account', async () => {
+  const projects = [
+    { id: '1', name: 'Alpha', account_id: 'acc-1' },
+    { id: '2', name: 'Beta', account_id: 'acc-1' },
+  ];
+
+  const client = createMockSupabaseClient({ data: projects, error: null });
+  const service = createProjectService(client);
+
+  const result = await service.list('acc-1');
+
+  expect(result).toEqual(projects);
+  expect(client.from).toHaveBeenCalledWith('projects');
+  expect(client.chain.eq).toHaveBeenCalledWith('account_id', 'acc-1');
+});
+```

.gitignore

@@ -47,4 +47,7 @@ yarn-error.log*
 .contentlayer/
 
 # ts-node cache
-node-compile-cache/
+node-compile-cache/
+
+# prds
+.prds/

.mcp.json

@@ -3,7 +3,7 @@
     "makerkit": {
       "type": "stdio",
       "command": "node",
-      "args": ["packages/mcp-server/build/index.js"]
+      "args": ["packages/mcp-server/build/index.cjs"]
     }
   }
-}
+}

CLAUDE.md

@@ -1 +1 @@
-@AGENTS.md
+@AGENTS.md

apps/dev-tool/app/database/page.tsx

@@ -4,9 +4,9 @@ import { DatabaseToolsInterface } from './_components/database-tools-interface';
 import { loadDatabaseToolsData } from './_lib/server/database-tools.loader';
 
 interface DatabasePageProps {
-  searchParams: {
+  searchParams: Promise<{
     search?: string;
-  };
+  }>;
 }
 
 export const metadata: Metadata = {
@@ -16,7 +16,7 @@ export const metadata: Metadata = {
 };
 
 async function DatabasePage({ searchParams }: DatabasePageProps) {
-  const searchTerm = searchParams.search || '';
+  const searchTerm = (await searchParams).search || '';
 
   // Load all database data server-side
   const databaseData = await loadDatabaseToolsData();

apps/dev-tool/app/emails/[id]/page.tsx

@@ -1,10 +1,12 @@
 import { EmailTesterForm } from '@/app/emails/[id]/components/email-tester-form';
-import { loadEmailTemplate } from '@/app/emails/lib/email-loader';
-import { getVariable } from '@/app/variables/lib/env-scanner';
-import { EnvMode } from '@/app/variables/lib/types';
 import { EnvModeSelector } from '@/components/env-mode-selector';
 import { IFrame } from '@/components/iframe';
 
+import {
+  createKitEmailsDeps,
+  createKitEmailsService,
+} from '@kit/mcp-server/emails';
+import { findWorkspaceRoot, getVariable } from '@kit/mcp-server/env';
 import { AppBreadcrumbs } from '@kit/ui/app-breadcrumbs';
 import { Button } from '@kit/ui/button';
 import {
@@ -15,6 +17,8 @@ import {
 } from '@kit/ui/dialog';
 import { Page, PageBody, PageHeader } from '@kit/ui/page';
 
+type EnvMode = 'development' | 'production';
+
 type EmailPageProps = React.PropsWithChildren<{
   params: Promise<{
     id: string;
@@ -31,25 +35,28 @@ export default async function EmailPage(props: EmailPageProps) {
   const { id } = await props.params;
   const mode = (await props.searchParams).mode ?? 'development';
 
-  const template = await loadEmailTemplate(id);
+  const rootPath = findWorkspaceRoot(process.cwd());
-  const emailSettings = await getEmailSettings(mode);
+  const service = createKitEmailsService(createKitEmailsDeps(rootPath));
 
-  const values: Record<string, string> = {
+  const [result, { templates }, emailSettings] = await Promise.all([
-    emails: 'Emails',
+    service.read({ id }),
-    'invite-email': 'Invite Email',
+    service.list(),
-    'account-delete-email': 'Account Delete Email',
+    getEmailSettings(mode),
-    'confirm-email': 'Confirm Email',
+  ]);
-    'change-email-address-email': 'Change Email Address Email',
+
-    'reset-password-email': 'Reset Password Email',
+  const html = result.renderedHtml ?? result.source;
-    'magic-link-email': 'Magic Link Email',
+
-    'otp-email': 'OTP Email',
+  const values: Record<string, string> = { emails: 'Emails' };
-  };
+
+  for (const t of templates) {
+    values[t.id] = t.name;
+  }
 
   return (
     <Page style={'custom'}>
       <PageHeader
         displaySidebarTrigger={false}
-        title={values[id]}
+        title={values[id] ?? id}
         description={<AppBreadcrumbs values={values} />}
       >
         <EnvModeSelector mode={mode} />
@@ -77,7 +84,7 @@ export default async function EmailPage(props: EmailPageProps) {
         <IFrame className={'flex flex-1 flex-col'}>
           <div
             className={'flex flex-1 flex-col'}
-            dangerouslySetInnerHTML={{ __html: template.html }}
+            dangerouslySetInnerHTML={{ __html: html }}
           />
         </IFrame>
       </PageBody>

apps/dev-tool/app/emails/lib/email-loader.tsx

@@ -1,60 +0,0 @@
-import {
-  renderAccountDeleteEmail,
-  renderInviteEmail,
-  renderOtpEmail,
-} from '@kit/email-templates';
-
-export async function loadEmailTemplate(id: string) {
-  switch (id) {
-    case 'account-delete-email':
-      return renderAccountDeleteEmail({
-        productName: 'Makerkit',
-        userDisplayName: 'Giancarlo',
-      });
-
-    case 'invite-email':
-      return renderInviteEmail({
-        teamName: 'Makerkit',
-        teamLogo: '',
-        inviter: 'Giancarlo',
-        invitedUserEmail: 'test@makerkit.dev',
-        link: 'https://makerkit.dev',
-        productName: 'Makerkit',
-      });
-
-    case 'otp-email':
-      return renderOtpEmail({
-        productName: 'Makerkit',
-        otp: '123456',
-      });
-
-    case 'magic-link-email':
-      return loadFromFileSystem('magic-link');
-
-    case 'reset-password-email':
-      return loadFromFileSystem('reset-password');
-
-    case 'change-email-address-email':
-      return loadFromFileSystem('change-email-address');
-
-    case 'confirm-email':
-      return loadFromFileSystem('confirm-email');
-
-    default:
-      throw new Error(`Email template not found: ${id}`);
-  }
-}
-
-async function loadFromFileSystem(fileName: string) {
-  const { readFileSync } = await import('node:fs');
-  const { join } = await import('node:path');
-
-  const filePath = join(
-    process.cwd(),
-    `../web/supabase/templates/${fileName}.html`,
-  );
-
-  return {
-    html: readFileSync(filePath, 'utf8'),
-  };
-}

apps/dev-tool/app/emails/lib/server-actions.ts

@@ -1,6 +1,10 @@
 'use server';
 
-import { loadEmailTemplate } from '@/app/emails/lib/email-loader';
+import {
+  createKitEmailsDeps,
+  createKitEmailsService,
+} from '@kit/mcp-server/emails';
+import { findWorkspaceRoot } from '@kit/mcp-server/env';
 
 export async function sendEmailAction(params: {
   template: string;
@@ -27,7 +31,10 @@ export async function sendEmailAction(params: {
     },
   });
 
-  const { html } = await loadEmailTemplate(params.template);
+  const rootPath = findWorkspaceRoot(process.cwd());
+  const service = createKitEmailsService(createKitEmailsDeps(rootPath));
+  const result = await service.read({ id: params.template });
+  const html = result.renderedHtml ?? result.source;
 
   return transporter.sendMail({
     html,

apps/dev-tool/app/emails/page.tsx

@@ -1,5 +1,10 @@
 import Link from 'next/link';
 
+import {
+  createKitEmailsDeps,
+  createKitEmailsService,
+} from '@kit/mcp-server/emails';
+import { findWorkspaceRoot } from '@kit/mcp-server/env';
 import {
   CardButton,
   CardButtonHeader,
@@ -12,7 +17,16 @@ export const metadata = {
   title: 'Emails',
 };
 
+const CATEGORY_LABELS: Record<string, string> = {
+  'supabase-auth': 'Supabase Auth Emails',
+  transactional: 'Transactional Emails',
+};
+
 export default async function EmailsPage() {
+  const rootPath = findWorkspaceRoot(process.cwd());
+  const service = createKitEmailsService(createKitEmailsDeps(rootPath));
+  const { templates, categories } = await service.list();
+
   return (
     <Page style={'custom'}>
       <PageHeader
@@ -22,73 +36,31 @@ export default async function EmailsPage() {
       />
 
       <PageBody className={'gap-y-8'}>
-        <div className={'flex flex-col space-y-4'}>
+        {categories.map((category) => {
-          <Heading level={5}>Supabase Auth Emails</Heading>
+          const categoryTemplates = templates.filter(
+            (t) => t.category === category,
+          );
 
-          <div className={'grid grid-cols-1 gap-4 md:grid-cols-4'}>
+          return (
-            <CardButton asChild>
+            <div key={category} className={'flex flex-col space-y-4'}>
-              <Link href={'/emails/confirm-email'}>
+              <Heading level={5}>
-                <CardButtonHeader>
+                {CATEGORY_LABELS[category] ?? category}
-                  <CardButtonTitle>Confirm Email</CardButtonTitle>
+              </Heading>
-                </CardButtonHeader>
-              </Link>
-            </CardButton>
 
-            <CardButton asChild>
+              <div className={'grid grid-cols-1 gap-4 md:grid-cols-4'}>
-              <Link href={'/emails/change-email-address-email'}>
+                {categoryTemplates.map((template) => (
-                <CardButtonHeader>
+                  <CardButton key={template.id} asChild>
-                  <CardButtonTitle>Change Email Address Email</CardButtonTitle>
+                    <Link href={`/emails/${template.id}`}>
-                </CardButtonHeader>
+                      <CardButtonHeader>
-              </Link>
+                        <CardButtonTitle>{template.name}</CardButtonTitle>
-            </CardButton>
+                      </CardButtonHeader>
-
+                    </Link>
-            <CardButton asChild>
+                  </CardButton>
-              <Link href={'/emails/reset-password-email'}>
+                ))}
-                <CardButtonHeader>
+              </div>
-                  <CardButtonTitle>Reset Password Email</CardButtonTitle>
+            </div>
-                </CardButtonHeader>
+          );
-              </Link>
+        })}
-            </CardButton>
-
-            <CardButton asChild>
-              <Link href={'/emails/magic-link-email'}>
-                <CardButtonHeader>
-                  <CardButtonTitle>Magic Link Email</CardButtonTitle>
-                </CardButtonHeader>
-              </Link>
-            </CardButton>
-          </div>
-        </div>
-
-        <div className={'flex flex-col space-y-4'}>
-          <Heading level={5}>Transactional Emails</Heading>
-
-          <div className={'grid grid-cols-1 gap-4 md:grid-cols-4'}>
-            <CardButton asChild>
-              <Link href={'/emails/account-delete-email'}>
-                <CardButtonHeader>
-                  <CardButtonTitle>Account Delete Email</CardButtonTitle>
-                </CardButtonHeader>
-              </Link>
-            </CardButton>
-
-            <CardButton asChild>
-              <Link href={'/emails/invite-email'}>
-                <CardButtonHeader>
-                  <CardButtonTitle>Invite Email</CardButtonTitle>
-                </CardButtonHeader>
-              </Link>
-            </CardButton>
-
-            <CardButton asChild>
-              <Link href={'/emails/otp-email'}>
-                <CardButtonHeader>
-                  <CardButtonTitle>OTP Email</CardButtonTitle>
-                </CardButtonHeader>
-              </Link>
-            </CardButton>
-          </div>
-        </div>
       </PageBody>
     </Page>
   );

apps/dev-tool/app/lib/connectivity-service.ts

@@ -1,228 +0,0 @@
-import { EnvMode } from '@/app/variables/lib/types';
-
-import { getVariable } from '../variables/lib/env-scanner';
-
-export function createConnectivityService(mode: EnvMode) {
-  return new ConnectivityService(mode);
-}
-
-class ConnectivityService {
-  constructor(private mode: EnvMode = 'development') {}
-
-  async checkSupabaseConnectivity() {
-    const url = await getVariable('NEXT_PUBLIC_SUPABASE_URL', this.mode);
-
-    if (!url) {
-      return {
-        status: 'error' as const,
-        message: 'No Supabase URL found in environment variables',
-      };
-    }
-
-    const anonKey =
-      (await getVariable('NEXT_PUBLIC_SUPABASE_ANON_KEY', this.mode)) ||
-      (await getVariable('NEXT_PUBLIC_SUPABASE_PUBLIC_KEY', this.mode));
-
-    if (!anonKey) {
-      return {
-        status: 'error' as const,
-        message: 'No Supabase Anon Key found in environment variables',
-      };
-    }
-
-    try {
-      const response = await fetch(`${url}/auth/v1/health`, {
-        headers: {
-          apikey: anonKey,
-          Authorization: `Bearer ${anonKey}`,
-        },
-      });
-
-      if (!response.ok) {
-        return {
-          status: 'error' as const,
-          message:
-            'Failed to connect to Supabase. The Supabase Anon Key or URL is not valid.',
-        };
-      }
-
-      return {
-        status: 'success' as const,
-        message: 'Connected to Supabase',
-      };
-    } catch (error) {
-      return {
-        status: 'error' as const,
-        message: `Failed to connect to Supabase. ${error}`,
-      };
-    }
-  }
-
-  async checkSupabaseAdminConnectivity() {
-    const url = await getVariable('NEXT_PUBLIC_SUPABASE_URL', this.mode);
-
-    if (!url) {
-      return {
-        status: 'error' as const,
-        message: 'No Supabase URL found in environment variables',
-      };
-    }
-
-    const endpoint = `${url}/rest/v1/accounts`;
-
-    const apikey =
-      (await getVariable('NEXT_PUBLIC_SUPABASE_ANON_KEY', this.mode)) ||
-      (await getVariable('NEXT_PUBLIC_SUPABASE_PUBLIC_KEY', this.mode));
-
-    if (!apikey) {
-      return {
-        status: 'error' as const,
-        message: 'No Supabase Anon Key found in environment variables',
-      };
-    }
-
-    const adminKey =
-      (await getVariable('SUPABASE_SERVICE_ROLE_KEY', this.mode)) ||
-      (await getVariable('SUPABASE_SECRET_KEY', this.mode));
-
-    if (!adminKey) {
-      return {
-        status: 'error' as const,
-        message: 'No Supabase Service Role Key found in environment variables',
-      };
-    }
-
-    try {
-      const response = await fetch(endpoint, {
-        headers: {
-          apikey: adminKey,
-        },
-      });
-
-      if (!response.ok) {
-        return {
-          status: 'error' as const,
-          message:
-            'Failed to connect to Supabase Admin. The Supabase Service Role Key is not valid.',
-        };
-      }
-
-      const data = await response.json();
-
-      if (data.length === 0) {
-        return {
-          status: 'error' as const,
-          message:
-            'No accounts found in Supabase Admin. The data may not be seeded. Please run `pnpm run supabase:web:reset` to reset the database.',
-        };
-      }
-
-      return {
-        status: 'success' as const,
-        message: 'Connected to Supabase Admin',
-      };
-    } catch (error) {
-      return {
-        status: 'error' as const,
-        message: `Failed to connect to Supabase Admin. ${error}`,
-      };
-    }
-  }
-
-  async checkStripeWebhookEndpoints() {
-    const secretKey = await getVariable('STRIPE_SECRET_KEY', this.mode);
-
-    if (!secretKey) {
-      return {
-        status: 'error' as const,
-        message: 'No Stripe Secret Key found in environment variables',
-      };
-    }
-
-    const webhooksSecret = await getVariable(
-      'STRIPE_WEBHOOK_SECRET',
-      this.mode,
-    );
-
-    if (!webhooksSecret) {
-      return {
-        status: 'error' as const,
-        message: 'No Webhooks secret found in environment variables',
-      };
-    }
-
-    const url = `https://api.stripe.com`;
-
-    const request = await fetch(`${url}/v1/webhook_endpoints`, {
-      headers: {
-        Authorization: `Bearer ${secretKey}`,
-      },
-    });
-
-    if (!request.ok) {
-      return {
-        status: 'error' as const,
-        message:
-          'Failed to connect to Stripe. The Stripe Webhook Secret is not valid.',
-      };
-    }
-
-    const webhooksResponse = await request.json();
-    const webhooks = webhooksResponse.data ?? [];
-
-    if (webhooks.length === 0) {
-      return {
-        status: 'error' as const,
-        message: 'No webhooks found in Stripe',
-      };
-    }
-
-    const allWebhooksShareTheSameSecret = webhooks.every(
-      (webhook: { secret: string }) => webhook.secret === webhooksSecret,
-    );
-
-    if (!allWebhooksShareTheSameSecret) {
-      return {
-        status: 'error' as const,
-        message: 'All webhooks do not share the same secret',
-      };
-    }
-
-    return {
-      status: 'success' as const,
-      message: 'All webhooks share the same Webhooks secret',
-    };
-  }
-
-  async checkStripeConnected() {
-    const secretKey = await getVariable('STRIPE_SECRET_KEY', this.mode);
-
-    if (!secretKey) {
-      return {
-        status: 'error' as const,
-        message: 'No Stripe Secret Key found in environment variables',
-      };
-    }
-
-    const url = `https://api.stripe.com`;
-
-    const request = await fetch(`${url}/v1/prices`, {
-      headers: {
-        Authorization: `Bearer ${secretKey}`,
-      },
-    });
-
-    if (!request.ok) {
-      return {
-        status: 'error' as const,
-        message:
-          'Failed to connect to Stripe. The Stripe Secret Key is not valid.',
-      };
-    }
-
-    return {
-      status: 'success' as const,
-      message: 'Connected to Stripe',
-    };
-  }
-}

apps/dev-tool/app/lib/prerequisites-dashboard.loader.ts

@@ -0,0 +1,154 @@
+import { execFile } from 'node:child_process';
+import { access, readFile } from 'node:fs/promises';
+import { join } from 'node:path';
+import { promisify } from 'node:util';
+
+import {
+  type KitPrerequisitesDeps,
+  createKitPrerequisitesService,
+} from '@kit/mcp-server/prerequisites';
+
+const execFileAsync = promisify(execFile);
+
+export async function loadDashboardKitPrerequisites() {
+  const rootPath = await findWorkspaceRoot(process.cwd());
+  const service = createKitPrerequisitesService(
+    createKitPrerequisitesDeps(rootPath),
+  );
+  return service.check({});
+}
+
+function createKitPrerequisitesDeps(rootPath: string): KitPrerequisitesDeps {
+  return {
+    async getVariantFamily() {
+      const variant = await resolveVariant(rootPath);
+      return variant.includes('supabase') ? 'supabase' : 'orm';
+    },
+    async executeCommand(command: string, args: string[]) {
+      const result = await executeWithFallback(rootPath, command, args);
+
+      return {
+        stdout: result.stdout,
+        stderr: result.stderr,
+        exitCode: 0,
+      };
+    },
+  };
+}
+
+async function executeWithFallback(
+  rootPath: string,
+  command: string,
+  args: string[],
+) {
+  try {
+    return await execFileAsync(command, args, {
+      cwd: rootPath,
+    });
+  } catch (error) {
+    if (isLocalCliCandidate(command)) {
+      const localBinCandidates = [
+        join(rootPath, 'node_modules', '.bin', command),
+        join(rootPath, 'apps', 'web', 'node_modules', '.bin', command),
+      ];
+
+      for (const localBin of localBinCandidates) {
+        try {
+          return await execFileAsync(localBin, args, {
+            cwd: rootPath,
+          });
+        } catch {
+          // Try next local binary candidate.
+        }
+      }
+
+      try {
+        return await execFileAsync('pnpm', ['exec', command, ...args], {
+          cwd: rootPath,
+        });
+      } catch {
+        return execFileAsync(
+          'pnpm',
+          ['--filter', 'web', 'exec', command, ...args],
+          {
+            cwd: rootPath,
+          },
+        );
+      }
+    }
+
+    throw error;
+  }
+}
+
+function isLocalCliCandidate(command: string) {
+  return command === 'supabase' || command === 'stripe';
+}
+
+async function resolveVariant(rootPath: string) {
+  const configPath = join(rootPath, '.makerkit', 'config.json');
+
+  try {
+    await access(configPath);
+    const config = JSON.parse(await readFile(configPath, 'utf8')) as Record<
+      string,
+      unknown
+    >;
+
+    const variant =
+      readString(config, 'variant') ??
+      readString(config, 'template') ??
+      readString(config, 'kitVariant');
+
+    if (variant) {
+      return variant;
+    }
+  } catch {
+    // Fall through to heuristic.
+  }
+
+  if (await pathExists(join(rootPath, 'apps', 'web', 'supabase'))) {
+    return 'next-supabase';
+  }
+
+  return 'next-drizzle';
+}
+
+function readString(obj: Record<string, unknown>, key: string) {
+  const value = obj[key];
+  return typeof value === 'string' && value.length > 0 ? value : null;
+}
+
+async function pathExists(path: string) {
+  try {
+    await access(path);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function findWorkspaceRoot(startPath: string) {
+  let current = startPath;
+
+  for (let depth = 0; depth < 6; depth++) {
+    const workspaceManifest = join(current, 'pnpm-workspace.yaml');
+
+    try {
+      await access(workspaceManifest);
+      return current;
+    } catch {
+      // Continue to parent path.
+    }
+
+    const parent = join(current, '..');
+
+    if (parent === current) {
+      break;
+    }
+
+    current = parent;
+  }
+
+  return startPath;
+}

apps/dev-tool/app/lib/status-dashboard.loader.ts

@@ -0,0 +1,116 @@
+import { execFile } from 'node:child_process';
+import { access, readFile, stat } from 'node:fs/promises';
+import { Socket } from 'node:net';
+import { join } from 'node:path';
+import { promisify } from 'node:util';
+
+import {
+  type KitStatusDeps,
+  createKitStatusService,
+} from '@kit/mcp-server/status';
+
+const execFileAsync = promisify(execFile);
+
+export async function loadDashboardKitStatus() {
+  const rootPath = await findWorkspaceRoot(process.cwd());
+  const service = createKitStatusService(createKitStatusDeps(rootPath));
+  return service.getStatus({});
+}
+
+function createKitStatusDeps(rootPath: string): KitStatusDeps {
+  return {
+    rootPath,
+    async readJsonFile(path: string): Promise<unknown> {
+      const filePath = join(rootPath, path);
+      const content = await readFile(filePath, 'utf8');
+      return JSON.parse(content) as unknown;
+    },
+    async pathExists(path: string) {
+      const fullPath = join(rootPath, path);
+
+      try {
+        await access(fullPath);
+        return true;
+      } catch {
+        return false;
+      }
+    },
+    async isDirectory(path: string) {
+      const fullPath = join(rootPath, path);
+
+      try {
+        const stats = await stat(fullPath);
+        return stats.isDirectory();
+      } catch {
+        return false;
+      }
+    },
+    async executeCommand(command: string, args: string[]) {
+      const result = await execFileAsync(command, args, {
+        cwd: rootPath,
+      });
+
+      return {
+        stdout: result.stdout,
+        stderr: result.stderr,
+        exitCode: 0,
+      };
+    },
+    async isPortOpen(port: number) {
+      return checkPort(port);
+    },
+    getNodeVersion() {
+      return process.version;
+    },
+  };
+}
+
+async function findWorkspaceRoot(startPath: string) {
+  let current = startPath;
+
+  for (let depth = 0; depth < 6; depth++) {
+    const workspaceManifest = join(current, 'pnpm-workspace.yaml');
+
+    try {
+      await access(workspaceManifest);
+      return current;
+    } catch {
+      // Continue to parent path.
+    }
+
+    const parent = join(current, '..');
+
+    if (parent === current) {
+      break;
+    }
+
+    current = parent;
+  }
+
+  return startPath;
+}
+
+async function checkPort(port: number) {
+  return new Promise<boolean>((resolve) => {
+    const socket = new Socket();
+
+    socket.setTimeout(200);
+
+    socket.once('connect', () => {
+      socket.destroy();
+      resolve(true);
+    });
+
+    socket.once('timeout', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.once('error', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.connect(port, '127.0.0.1');
+  });
+}

apps/dev-tool/app/mcp-server/_components/mcp-server-interface.tsx

@@ -1,13 +0,0 @@
-import { loadPRDs } from '../_lib/server/prd-loader';
-import { McpServerTabs } from './mcp-server-tabs';
-import { PRDManagerClient } from './prd-manager-client';
-
-export async function McpServerInterface() {
-  const initialPrds = await loadPRDs();
-
-  return (
-    <McpServerTabs
-      prdManagerContent={<PRDManagerClient initialPrds={initialPrds} />}
-    />
-  );
-}

apps/dev-tool/app/mcp-server/_components/mcp-server-tabs.tsx

@@ -1,53 +0,0 @@
-'use client';
-
-import { DatabaseIcon, FileTextIcon } from 'lucide-react';
-
-import { Tabs, TabsContent, TabsList, TabsTrigger } from '@kit/ui/tabs';
-
-interface McpServerTabsProps {
-  prdManagerContent: React.ReactNode;
-  databaseToolsContent?: React.ReactNode;
-}
-
-export function McpServerTabs({
-  prdManagerContent,
-  databaseToolsContent,
-}: McpServerTabsProps) {
-  return (
-    <div className="h-full">
-      <Tabs defaultValue="database-tools" className="flex h-full flex-col">
-        <TabsList className="grid w-full grid-cols-2">
-          <TabsTrigger
-            value="database-tools"
-            className="flex items-center gap-2"
-          >
-            <DatabaseIcon className="h-4 w-4" />
-            Database Tools
-          </TabsTrigger>
-          <TabsTrigger value="prd-manager" className="flex items-center gap-2">
-            <FileTextIcon className="h-4 w-4" />
-            PRD Manager
-          </TabsTrigger>
-        </TabsList>
-
-        <TabsContent value="database-tools" className="flex-1 space-y-4">
-          {databaseToolsContent || (
-            <div className="flex h-full items-center justify-center">
-              <div className="text-center">
-                <DatabaseIcon className="text-muted-foreground mx-auto h-12 w-12" />
-                <h3 className="mt-4 text-lg font-semibold">Database Tools</h3>
-                <p className="text-muted-foreground">
-                  Explore database schemas, tables, functions, and enums
-                </p>
-              </div>
-            </div>
-          )}
-        </TabsContent>
-
-        <TabsContent value="prd-manager" className="flex-1 space-y-4">
-          {prdManagerContent}
-        </TabsContent>
-      </Tabs>
-    </div>
-  );
-}

apps/dev-tool/app/mcp-server/_components/prd-manager-client.tsx

@@ -1,188 +0,0 @@
-'use client';
-
-import { useState } from 'react';
-
-import Link from 'next/link';
-
-import { CalendarIcon, FileTextIcon, PlusIcon, SearchIcon } from 'lucide-react';
-
-import { Button } from '@kit/ui/button';
-import { Card, CardContent, CardHeader, CardTitle } from '@kit/ui/card';
-import {
-  Dialog,
-  DialogClose,
-  DialogContent,
-  DialogHeader,
-  DialogTitle,
-} from '@kit/ui/dialog';
-import { Input } from '@kit/ui/input';
-import { Progress } from '@kit/ui/progress';
-
-import type { CreatePRDData } from '../_lib/schemas/create-prd.schema';
-import { createPRDAction } from '../_lib/server/prd-server-actions';
-import { CreatePRDForm } from './create-prd-form';
-
-interface PRDSummary {
-  filename: string;
-  title: string;
-  lastUpdated: string;
-  progress: number;
-  totalStories: number;
-  completedStories: number;
-}
-
-interface PRDManagerClientProps {
-  initialPrds: PRDSummary[];
-}
-
-export function PRDManagerClient({ initialPrds }: PRDManagerClientProps) {
-  const [prds, setPrds] = useState<PRDSummary[]>(initialPrds);
-  const [searchTerm, setSearchTerm] = useState('');
-  const [showCreateForm, setShowCreateForm] = useState(false);
-
-  const handleCreatePRD = async (data: CreatePRDData) => {
-    const result = await createPRDAction(data);
-
-    if (result.success && result.data) {
-      const newPRD: PRDSummary = {
-        filename: result.data.filename,
-        title: result.data.title,
-        lastUpdated: result.data.lastUpdated,
-        progress: result.data.progress,
-        totalStories: result.data.totalStories,
-        completedStories: result.data.completedStories,
-      };
-
-      setPrds((prev) => [...prev, newPRD]);
-      setShowCreateForm(false);
-
-      // Note: In a production app, you might want to trigger a router.refresh()
-      // to reload the server component and get the most up-to-date data
-    } else {
-      // Error handling will be managed by the form component via the action result
-      throw new Error(result.error || 'Failed to create PRD');
-    }
-  };
-
-  const filteredPrds = prds.filter(
-    (prd) =>
-      prd.title.toLowerCase().includes(searchTerm.toLowerCase()) ||
-      prd.filename.toLowerCase().includes(searchTerm.toLowerCase()),
-  );
-
-  return (
-    <div className="space-y-6">
-      {/* Header with search and create button */}
-      <div className="flex w-full flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
-        <div className="relative flex-1">
-          <SearchIcon className="text-muted-foreground absolute top-1/2 left-3 h-4 w-4 -translate-y-1/2" />
-
-          <Input
-            placeholder="Search PRDs by title or filename..."
-            value={searchTerm}
-            onChange={(e) => setSearchTerm(e.target.value)}
-            className="pl-10"
-          />
-        </div>
-
-        <Button
-          onClick={() => setShowCreateForm(true)}
-          className="flex items-center gap-2"
-        >
-          <PlusIcon className="h-4 w-4" />
-          Create New PRD
-        </Button>
-      </div>
-
-      {/* PRD List */}
-      {filteredPrds.length === 0 ? (
-        <Card>
-          <CardContent className="flex h-32 items-center justify-center">
-            <div className="text-center">
-              <FileTextIcon className="text-muted-foreground mx-auto h-8 w-8" />
-
-              <p className="text-muted-foreground mt-2">
-                {searchTerm ? 'No PRDs match your search' : 'No PRDs found'}
-              </p>
-
-              {!searchTerm && (
-                <Button
-                  variant="link"
-                  onClick={() => setShowCreateForm(true)}
-                  className="mt-2"
-                >
-                  Create your first PRD
-                </Button>
-              )}
-            </div>
-          </CardContent>
-        </Card>
-      ) : (
-        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
-          {filteredPrds.map((prd) => (
-            <Link
-              key={prd.filename}
-              href={`/mcp-server/prds/${prd.filename}`}
-              className="block"
-            >
-              <Card className="cursor-pointer transition-shadow hover:shadow-md">
-                <CardHeader className="pb-3">
-                  <CardTitle className="flex items-start gap-2 text-sm">
-                    <FileTextIcon className="text-muted-foreground mt-0.5 h-4 w-4" />
-                    <span className="line-clamp-2">{prd.title}</span>
-                  </CardTitle>
-                </CardHeader>
-                <CardContent className="space-y-3">
-                  {/* Progress */}
-                  <div className="space-y-2">
-                    <div className="text-muted-foreground flex justify-between text-xs">
-                      <span>Progress</span>
-                      <span>
-                        {prd.completedStories}/{prd.totalStories} stories
-                      </span>
-                    </div>
-                    <Progress value={prd.progress} className="h-2" />
-                    <div className="text-right text-xs font-medium">
-                      {prd.progress}%
-                    </div>
-                  </div>
-
-                  {/* Metadata */}
-                  <div className="text-muted-foreground flex items-center gap-1 text-xs">
-                    <CalendarIcon className="h-3 w-3" />
-                    <span>Updated {prd.lastUpdated}</span>
-                  </div>
-
-                  {/* Filename */}
-                  <div className="text-muted-foreground text-xs">
-                    {prd.filename}
-                  </div>
-                </CardContent>
-              </Card>
-            </Link>
-          ))}
-        </div>
-      )}
-
-      {/* Create PRD Form Modal */}
-      {showCreateForm && (
-        <Dialog open={showCreateForm} onOpenChange={setShowCreateForm}>
-          <DialogContent className="max-w-4xl overflow-y-hidden">
-            <DialogHeader>
-              <DialogTitle>Create New PRD</DialogTitle>
-            </DialogHeader>
-
-            <div
-              className="overflow-y-auto p-0.5"
-              style={{
-                maxHeight: '800px',
-              }}
-            >
-              <CreatePRDForm onSubmit={handleCreatePRD} />
-            </div>
-          </DialogContent>
-        </Dialog>
-      )}
-    </div>
-  );
-}

apps/dev-tool/app/mcp-server/page.tsx

@@ -1,106 +0,0 @@
-import Link from 'next/link';
-
-import { withI18n } from '@/lib/i18n/with-i18n';
-import { DatabaseIcon, FileTextIcon, ServerIcon } from 'lucide-react';
-
-import { Button } from '@kit/ui/button';
-import { Card, CardContent, CardHeader, CardTitle } from '@kit/ui/card';
-import { Page, PageBody, PageHeader } from '@kit/ui/page';
-
-export const metadata = {
-  title: 'MCP Server',
-  description:
-    'MCP Server development interface for database exploration and PRD management',
-};
-
-function McpServerPage() {
-  return (
-    <Page style={'custom'}>
-      <div className={'flex h-screen flex-col overflow-hidden'}>
-        <PageHeader
-          displaySidebarTrigger={false}
-          title={'MCP Server'}
-          description={
-            'Access MCP Server tools for database exploration and PRD management.'
-          }
-        />
-
-        <PageBody className={'overflow-hidden'}>
-          <div className={'flex h-full flex-1 flex-col p-6'}>
-            <div className="space-y-6">
-              {/* Welcome Section */}
-              <div className="text-center">
-                <ServerIcon className="text-muted-foreground mx-auto mb-4 h-16 w-16" />
-                <h2 className="mb-2 text-2xl font-bold">
-                  Welcome to MCP Server Tools
-                </h2>
-                <p className="text-muted-foreground mx-auto max-w-2xl">
-                  Choose from the tools below to explore your database schema or
-                  manage your Product Requirements Documents. Use the sidebar
-                  navigation for quick access to specific tools.
-                </p>
-              </div>
-
-              {/* Tool Cards */}
-              <div className="mx-auto grid max-w-4xl gap-6 md:grid-cols-2">
-                <Card className="cursor-pointer transition-shadow hover:shadow-md">
-                  <CardHeader>
-                    <CardTitle className="flex items-center gap-3">
-                      <DatabaseIcon className="h-6 w-6" />
-                      Database Tools
-                    </CardTitle>
-                  </CardHeader>
-                  <CardContent className="space-y-4">
-                    <p className="text-muted-foreground">
-                      Explore database schemas, tables, functions, and enums
-                      through an intuitive interface.
-                    </p>
-                    <ul className="text-muted-foreground space-y-1 text-sm">
-                      <li>• Browse database schemas and their structure</li>
-                      <li>• Explore tables with columns and relationships</li>
-                      <li>
-                        • Discover database functions and their parameters
-                      </li>
-                      <li>• View enum types and their values</li>
-                    </ul>
-                    <Button asChild className="w-full">
-                      <Link href="/mcp-server/database">
-                        Open Database Tools
-                      </Link>
-                    </Button>
-                  </CardContent>
-                </Card>
-
-                <Card className="cursor-pointer transition-shadow hover:shadow-md">
-                  <CardHeader>
-                    <CardTitle className="flex items-center gap-3">
-                      <FileTextIcon className="h-6 w-6" />
-                      PRD Manager
-                    </CardTitle>
-                  </CardHeader>
-                  <CardContent className="space-y-4">
-                    <p className="text-muted-foreground">
-                      Create and manage Product Requirements Documents with user
-                      stories and progress tracking.
-                    </p>
-                    <ul className="text-muted-foreground space-y-1 text-sm">
-                      <li>• Create and edit PRDs with structured templates</li>
-                      <li>• Manage user stories with priority tracking</li>
-                      <li>• Track progress and project status</li>
-                      <li>• Export PRDs to markdown format</li>
-                    </ul>
-                    <Button asChild className="w-full">
-                      <Link href="/mcp-server/prd">Open PRD Manager</Link>
-                    </Button>
-                  </CardContent>
-                </Card>
-              </div>
-            </div>
-          </div>
-        </PageBody>
-      </div>
-    </Page>
-  );
-}
-
-export default withI18n(McpServerPage);

apps/dev-tool/app/page.tsx

@@ -1,25 +1,37 @@
-import { EnvMode } from '@/app/variables/lib/types';
-import { EnvModeSelector } from '@/components/env-mode-selector';
 import { ServiceCard } from '@/components/status-tile';
 
+import { Card, CardContent, CardHeader, CardTitle } from '@kit/ui/card';
 import { Page, PageBody, PageHeader } from '@kit/ui/page';
 
-import { createConnectivityService } from './lib/connectivity-service';
+import { loadDashboardKitPrerequisites } from './lib/prerequisites-dashboard.loader';
+import { loadDashboardKitStatus } from './lib/status-dashboard.loader';
 
-type DashboardPageProps = React.PropsWithChildren<{
+export default async function DashboardPage() {
-  searchParams: Promise<{ mode?: EnvMode }>;
+  const [status, prerequisites] = await Promise.all([
-}>;
+    loadDashboardKitStatus(),
+    loadDashboardKitPrerequisites(),
+  ]);
 
-export default async function DashboardPage(props: DashboardPageProps) {
+  const failedRequiredCount = prerequisites.prerequisites.filter(
-  const mode = (await props.searchParams).mode ?? 'development';
+    (item) => item.required && item.status === 'fail',
-  const connectivityService = createConnectivityService(mode);
+  ).length;
 
-  const [supabaseStatus, supabaseAdminStatus, stripeStatus] = await Promise.all(
+  const warnCount = prerequisites.prerequisites.filter(
-    [
+    (item) => item.status === 'warn',
-      connectivityService.checkSupabaseConnectivity(),
+  ).length;
-      connectivityService.checkSupabaseAdminConnectivity(),
+
-      connectivityService.checkStripeConnected(),
+  const failedRequired = prerequisites.prerequisites.filter(
-    ],
+    (item) => item.required && item.status === 'fail',
+  );
+
+  const prerequisiteRemedies = Array.from(
+    new Set(
+      failedRequired.flatMap((item) => [
+        ...(item.remedies ?? []),
+        ...(item.install_command ? [item.install_command] : []),
+        ...(item.install_url ? [item.install_url] : []),
+      ]),
+    ),
   );
 
   return (
@@ -27,17 +39,148 @@ export default async function DashboardPage(props: DashboardPageProps) {
       <PageHeader
         displaySidebarTrigger={false}
         title={'Dev Tool'}
-        description={'Check the status of your Supabase and Stripe services'}
+        description={'Kit MCP status for this workspace'}
-      >
+      />
-        <EnvModeSelector mode={mode} />
-      </PageHeader>
 
       <PageBody className={'space-y-8 py-2'}>
         <div className="grid grid-cols-1 gap-4 md:grid-cols-4">
-          <ServiceCard name={'Supabase API'} status={supabaseStatus} />
+          <ServiceCard
-          <ServiceCard name={'Supabase Admin'} status={supabaseAdminStatus} />
+            name={'Variant'}
-          <ServiceCard name={'Stripe API'} status={stripeStatus} />
+            status={{
+              status: 'success',
+              message: `${status.variant} (${status.variant_family})`,
+            }}
+          />
+
+          <ServiceCard
+            name={'Runtime'}
+            status={{
+              status: 'success',
+              message: `${status.framework} • Node ${status.node_version} • ${status.package_manager}`,
+            }}
+          />
+
+          <ServiceCard
+            name={'Dependencies'}
+            status={{
+              status: status.deps_installed ? 'success' : 'error',
+              message: status.deps_installed
+                ? 'Dependencies installed'
+                : 'node_modules not found',
+            }}
+          />
+
+          <ServiceCard
+            name={'Git'}
+            status={{
+              status:
+                status.git_branch === 'unknown'
+                  ? 'info'
+                  : status.git_clean
+                    ? 'success'
+                    : 'warning',
+              message: `${status.git_branch} (${status.git_clean ? 'clean' : 'dirty'}) • ${status.git_modified_files.length} modified • ${status.git_untracked_files.length} untracked`,
+            }}
+          />
+
+          <ServiceCard
+            name={'Dev Server'}
+            status={{
+              status: status.services.app.running ? 'success' : 'error',
+              message: status.services.app.running
+                ? `Running on port ${status.services.app.port}`
+                : 'Not running',
+            }}
+          />
+
+          <ServiceCard
+            name={'Supabase'}
+            status={{
+              status: status.services.supabase.running ? 'success' : 'error',
+              message: status.services.supabase.running
+                ? `Running${status.services.supabase.api_port ? ` (API ${status.services.supabase.api_port})` : ''}${status.services.supabase.studio_port ? ` (Studio ${status.services.supabase.studio_port})` : ''}`
+                : 'Not running',
+            }}
+          />
+
+          <ServiceCard
+            name={'Merge Check'}
+            status={{
+              status:
+                status.git_merge_check.has_conflicts === true
+                  ? 'warning'
+                  : status.git_merge_check.detectable
+                    ? 'success'
+                    : 'info',
+              message: status.git_merge_check.detectable
+                ? status.git_merge_check.has_conflicts
+                  ? `${status.git_merge_check.conflict_files.length} potential conflicts vs ${status.git_merge_check.target_branch}`
+                  : `No conflicts vs ${status.git_merge_check.target_branch}`
+                : status.git_merge_check.message,
+            }}
+          />
+
+          <ServiceCard
+            name={'Prerequisites'}
+            status={{
+              status:
+                prerequisites.overall === 'fail'
+                  ? 'error'
+                  : prerequisites.overall === 'warn'
+                    ? 'warning'
+                    : 'success',
+              message:
+                prerequisites.overall === 'fail'
+                  ? `${failedRequiredCount} required tools missing/mismatched`
+                  : prerequisites.overall === 'warn'
+                    ? `${warnCount} optional warnings`
+                    : 'All prerequisites satisfied',
+            }}
+          />
         </div>
+
+        {failedRequired.length > 0 ? (
+          <Card>
+            <CardHeader>
+              <CardTitle>Prerequisites Details</CardTitle>
+            </CardHeader>
+
+            <CardContent className={'space-y-4'}>
+              <div className={'space-y-2'}>
+                <p className={'text-sm font-medium'}>Missing or Mismatched</p>
+                <ul
+                  className={
+                    'text-muted-foreground list-disc space-y-1 pl-5 text-sm'
+                  }
+                >
+                  {failedRequired.map((item) => (
+                    <li key={item.id}>
+                      {item.name}
+                      {item.version
+                        ? ` (installed ${item.version}, requires >= ${item.minimum_version})`
+                        : ' (not installed)'}
+                    </li>
+                  ))}
+                </ul>
+              </div>
+
+              <div className={'space-y-2'}>
+                <p className={'text-sm font-medium'}>Remediation</p>
+                <ul
+                  className={
+                    'text-muted-foreground list-disc space-y-1 pl-5 text-sm'
+                  }
+                >
+                  {prerequisiteRemedies.map((remedy) => (
+                    <li key={remedy}>
+                      <code>{remedy}</code>
+                    </li>
+                  ))}
+                </ul>
+              </div>
+            </CardContent>
+          </Card>
+        ) : null}
       </PageBody>
     </Page>
   );

apps/dev-tool/app/prds/[filename]/_components/prd-detail-view.tsx

@@ -8,8 +8,8 @@ import { Progress } from '@kit/ui/progress';
 import { Separator } from '@kit/ui/separator';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@kit/ui/tabs';
 
-import { UserStoryDisplay } from '../../../_components/user-story-display';
+import { UserStoryDisplay } from '../../_components/user-story-display';
-import type { PRDData } from '../../../_lib/server/prd-page.loader';
+import type { PRDData } from '../../_lib/server/prd-page.loader';
 
 interface PRDDetailViewProps {
   filename: string;

apps/dev-tool/app/prds/[filename]/page.tsx

@@ -2,7 +2,7 @@ import { Metadata } from 'next';
 
 import { notFound } from 'next/navigation';
 
-import { loadPRDPageData } from '../../_lib/server/prd-page.loader';
+import { loadPRDPageData } from '../_lib/server/prd-page.loader';
 import { PRDDetailView } from './_components/prd-detail-view';
 
 interface PRDPageProps {

apps/dev-tool/app/prds/_components/prds-list-interface.tsx

@@ -79,7 +79,7 @@ export function PRDsListInterface({ initialPrds }: PRDsListInterfaceProps) {
           {filteredPrds.map((prd) => (
             <Link
               key={prd.filename}
-              href={`/mcp-server/prds/${prd.filename}`}
+              href={`/prds/${prd.filename}`}
               className="block"
             >
               <Card className="cursor-pointer transition-shadow hover:shadow-md">

apps/dev-tool/app/prds/page.tsx

@@ -1,7 +1,7 @@
 import { Metadata } from 'next';
 
-import { loadPRDs } from '../_lib/server/prd-loader';
 import { PRDsListInterface } from './_components/prds-list-interface';
+import { loadPRDs } from './_lib/server/prd-loader';
 
 export const metadata: Metadata = {
   title: 'PRDs - MCP Server',

apps/dev-tool/app/translations/components/translations-comparison.tsx

@@ -33,27 +33,7 @@ import {
 import { cn } from '@kit/ui/utils';
 
 import { updateTranslationAction } from '../lib/server-actions';
-import type { TranslationData, Translations } from '../lib/translations-loader';
+import type { Translations } from '../lib/translations-loader';
-
-function flattenTranslations(
-  obj: TranslationData,
-  prefix = '',
-  result: Record<string, string> = {},
-) {
-  for (const [key, value] of Object.entries(obj)) {
-    const newKey = prefix ? `${prefix}.${key}` : key;
-
-    if (typeof value === 'string') {
-      result[newKey] = value;
-    } else {
-      flattenTranslations(value, newKey, result);
-    }
-  }
-
-  return result;
-}
-
-type FlattenedTranslations = Record<string, Record<string, string>>;
 
 export function TranslationsComparison({
   translations,
@@ -74,35 +54,24 @@ export function TranslationsComparison({
     [],
   );
 
-  const locales = Object.keys(translations);
+  const { base_locale, locales, namespaces } = translations;
-  const baseLocale = locales[0]!;
-  const namespaces = Object.keys(translations[baseLocale] || {});
 
   const [selectedLocales, setSelectedLocales] = useState<Set<string>>(
     new Set(locales),
   );
 
-  // Flatten translations for the selected namespace
-  const flattenedTranslations: FlattenedTranslations = {};
-
   const [selectedNamespace, setSelectedNamespace] = useState(
-    namespaces[0] as string,
+    namespaces[0] ?? '',
   );
 
-  for (const locale of locales) {
-    const namespaceData = translations[locale]?.[selectedNamespace];
-
-    if (namespaceData) {
-      flattenedTranslations[locale] = flattenTranslations(namespaceData);
-    } else {
-      flattenedTranslations[locale] = {};
-    }
-  }
-
   // Get all unique keys across all translations
   const allKeys = Array.from(
     new Set(
-      Object.values(flattenedTranslations).flatMap((data) => Object.keys(data)),
+      locales.flatMap((locale) =>
+        Object.keys(
+          translations.translations[locale]?.[selectedNamespace] ?? {},
+        ),
+      ),
     ),
   ).sort();
 
@@ -143,7 +112,7 @@ export function TranslationsComparison({
     return () => subscription.unsubscribe();
   }, [subject$]);
 
-  if (locales.length === 0) {
+  if (locales.length === 0 || !base_locale) {
     return <div>No translations found</div>;
   }
 
@@ -228,12 +197,16 @@ export function TranslationsComparison({
                 </TableCell>
 
                 {visibleLocales.map((locale) => {
-                  const translations = flattenedTranslations[locale] ?? {};
+                  const translationsForLocale =
+                    translations.translations[locale]?.[selectedNamespace] ??
+                    {};
 
                   const baseTranslations =
-                    flattenedTranslations[baseLocale] ?? {};
+                    translations.translations[base_locale]?.[
+                      selectedNamespace
+                    ] ?? {};
 
-                  const value = translations[key];
+                  const value = translationsForLocale[key];
                   const baseValue = baseTranslations[key];
                   const isMissing = !value;
                   const isDifferent = value !== baseValue;

apps/dev-tool/app/translations/lib/server-actions.ts

@@ -2,10 +2,14 @@
 
 import { revalidatePath } from 'next/cache';
 
-import { readFileSync, writeFileSync } from 'node:fs';
-import { resolve } from 'node:url';
 import { z } from 'zod';
 
+import { findWorkspaceRoot } from '@kit/mcp-server/env';
+import {
+  createKitTranslationsDeps,
+  createKitTranslationsService,
+} from '@kit/mcp-server/translations';
+
 const Schema = z.object({
   locale: z.string().min(1),
   namespace: z.string().min(1),
@@ -20,40 +24,18 @@ const Schema = z.object({
 export async function updateTranslationAction(props: z.infer<typeof Schema>) {
   // Validate the input
   const { locale, namespace, key, value } = Schema.parse(props);
+  const rootPath = findWorkspaceRoot(process.cwd());
 
-  const root = resolve(process.cwd(), '..');
+  const service = createKitTranslationsService(
-  const filePath = `${root}apps/web/public/locales/${locale}/${namespace}.json`;
+    createKitTranslationsDeps(rootPath),
+  );
 
   try {
-    // Read the current translations file
+    const result = await service.update({ locale, namespace, key, value });
-    const translationsFile = readFileSync(filePath, 'utf8');
-    const translations = JSON.parse(translationsFile) as Record<string, any>;
-
-    // Update the nested key value
-    const keys = key.split('.') as string[];
-    let current = translations;
-
-    // Navigate through nested objects until the second-to-last key
-    for (let i = 0; i < keys.length - 1; i++) {
-      const currentKey = keys[i] as string;
-
-      if (!current[currentKey]) {
-        current[currentKey] = {};
-      }
-
-      current = current[currentKey];
-    }
-
-    // Set the value at the final key
-    const finalKey = keys[keys.length - 1] as string;
-    current[finalKey] = value;
-
-    // Write the updated translations back to the file
-    writeFileSync(filePath, JSON.stringify(translations, null, 2), 'utf8');
 
     revalidatePath(`/translations`);
 
-    return { success: true };
+    return result;
   } catch (error) {
     console.error('Failed to update translation:', error);
     throw new Error('Failed to update translation');

apps/dev-tool/app/translations/lib/translations-loader.ts

@@ -1,50 +1,21 @@
-import { readFileSync, readdirSync } from 'node:fs';
+import { findWorkspaceRoot } from '@kit/mcp-server/env';
-import { join } from 'node:path';
+import {
-
+  createKitTranslationsDeps,
-export type TranslationData = {
+  createKitTranslationsService,
-  [key: string]: string | TranslationData;
+} from '@kit/mcp-server/translations';
-};
 
 export type Translations = {
-  [locale: string]: {
+  base_locale: string;
-    [namespace: string]: TranslationData;
+  locales: string[];
-  };
+  namespaces: string[];
+  translations: Record<string, Record<string, Record<string, string>>>;
 };
 
-export async function loadTranslations() {
+export async function loadTranslations(): Promise<Translations> {
-  const localesPath = join(process.cwd(), '../web/public/locales');
+  const rootPath = findWorkspaceRoot(process.cwd());
-  const localesDirents = readdirSync(localesPath, { withFileTypes: true });
+  const service = createKitTranslationsService(
+    createKitTranslationsDeps(rootPath),
+  );
 
-  const locales = localesDirents
+  return service.list();
-    .filter((dirent) => dirent.isDirectory())
-    .map((dirent) => dirent.name);
-
-  const translations: Translations = {};
-
-  for (const locale of locales) {
-    translations[locale] = {};
-
-    const namespaces = readdirSync(join(localesPath, locale)).filter((file) =>
-      file.endsWith('.json'),
-    );
-
-    for (const namespace of namespaces) {
-      const namespaceName = namespace.replace('.json', '');
-
-      try {
-        const filePath = join(localesPath, locale, namespace);
-        const content = readFileSync(filePath, 'utf8');
-
-        translations[locale][namespaceName] = JSON.parse(content);
-      } catch (error) {
-        console.warn(
-          `Warning: Translation file not found for locale "${locale}" and namespace "${namespaceName}"`,
-        );
-
-        translations[locale][namespaceName] = {};
-      }
-    }
-  }
-
-  return translations;
 }

apps/dev-tool/app/translations/page.tsx

@@ -1,6 +1,5 @@
 import { Metadata } from 'next';
 
-import { AppBreadcrumbs } from '@kit/ui/app-breadcrumbs';
 import { Page, PageBody, PageHeader } from '@kit/ui/page';
 
 import { TranslationsComparison } from './components/translations-comparison';

apps/dev-tool/app/variables/lib/env-scanner.ts

@@ -1,471 +1,6 @@
-import 'server-only';
+export {
-
+  getEnvState,
-import fs from 'fs/promises';
+  getVariable,
-import path from 'path';
+  processEnvDefinitions,
-
+  scanMonorepoEnv,
-import { envVariables } from './env-variables-model';
+} from '@kit/mcp-server/env';
-import {
-  AppEnvState,
-  EnvFileInfo,
-  EnvMode,
-  EnvVariableState,
-  ScanOptions,
-} from './types';
-
-// Define precedence order for each mode
-const ENV_FILE_PRECEDENCE: Record<EnvMode, string[]> = {
-  development: [
-    '.env',
-    '.env.development',
-    '.env.local',
-    '.env.development.local',
-  ],
-  production: [
-    '.env',
-    '.env.production',
-    '.env.local',
-    '.env.production.local',
-  ],
-};
-
-function getSourcePrecedence(source: string, mode: EnvMode): number {
-  return ENV_FILE_PRECEDENCE[mode].indexOf(source);
-}
-
-export async function scanMonorepoEnv(
-  options: ScanOptions,
-): Promise<EnvFileInfo[]> {
-  const {
-    rootDir = path.resolve(process.cwd(), '../..'),
-    apps = ['web'],
-    mode,
-  } = options;
-
-  const envTypes = ENV_FILE_PRECEDENCE[mode];
-  const appsDir = path.join(rootDir, 'apps');
-  const results: EnvFileInfo[] = [];
-
-  try {
-    const appDirs = await fs.readdir(appsDir);
-
-    for (const appName of appDirs) {
-      if (apps.length > 0 && !apps.includes(appName)) {
-        continue;
-      }
-
-      const appDir = path.join(appsDir, appName);
-      const stat = await fs.stat(appDir);
-
-      if (!stat.isDirectory()) {
-        continue;
-      }
-
-      const appInfo: EnvFileInfo = {
-        appName,
-        filePath: appDir,
-        variables: [],
-      };
-
-      for (const envType of envTypes) {
-        const envPath = path.join(appDir, envType);
-
-        try {
-          const content = await fs.readFile(envPath, 'utf-8');
-          const vars = parseEnvFile(content, envType);
-
-          appInfo.variables.push(...vars);
-        } catch (error) {
-          if ((error as NodeJS.ErrnoException).code !== 'ENOENT') {
-            console.warn(`Error reading ${envPath}:`, error);
-          }
-        }
-      }
-
-      if (appInfo.variables.length > 0) {
-        results.push(appInfo);
-      }
-    }
-  } catch (error) {
-    console.error('Error scanning monorepo:', error);
-    throw error;
-  }
-
-  return results;
-}
-
-function parseEnvFile(content: string, source: string) {
-  const variables: Array<{ key: string; value: string; source: string }> = [];
-
-  const lines = content.split('\n');
-
-  for (const line of lines) {
-    // Skip comments and empty lines
-    if (line.trim().startsWith('#') || !line.trim()) {
-      continue;
-    }
-
-    // Match KEY=VALUE pattern, handling quotes
-    const match = line.match(/^([^=]+)=(.*)$/);
-    if (match) {
-      const [, key = '', rawValue] = match;
-      let value = rawValue ?? '';
-
-      // Remove quotes if present
-      if (
-        (value.startsWith('"') && value.endsWith('"')) ||
-        (value.startsWith("'") && value.endsWith("'"))
-      ) {
-        value = value.slice(1, -1);
-      }
-
-      // Handle escaped quotes within the value
-      value = value
-        .replace(/\\"/g, '"')
-        .replace(/\\'/g, "'")
-        .replace(/\\\\/g, '\\');
-
-      variables.push({
-        key: key.trim(),
-        value: value.trim(),
-        source,
-      });
-    }
-  }
-
-  return variables;
-}
-
-export function processEnvDefinitions(
-  envInfo: EnvFileInfo,
-  mode: EnvMode,
-): AppEnvState {
-  const variableMap: Record<string, EnvVariableState> = {};
-
-  // First pass: Collect all definitions
-  for (const variable of envInfo.variables) {
-    if (!variable) {
-      continue;
-    }
-
-    const model = envVariables.find((v) => variable.key === v.name);
-
-    if (!variableMap[variable.key]) {
-      variableMap[variable.key] = {
-        key: variable.key,
-        isVisible: true,
-        definitions: [],
-        effectiveValue: variable.value,
-        effectiveSource: variable.source,
-        isOverridden: false,
-        category: model ? model.category : 'Custom',
-        validation: {
-          success: true,
-          error: {
-            issues: [],
-          },
-        },
-      };
-    }
-
-    const varState = variableMap[variable.key];
-
-    if (!varState) {
-      continue;
-    }
-
-    varState.definitions.push({
-      key: variable.key,
-      value: variable.value,
-      source: variable.source,
-    });
-  }
-
-  // Second pass: Determine effective values and override status
-  for (const key in variableMap) {
-    const varState = variableMap[key];
-
-    if (!varState) {
-      continue;
-    }
-
-    // Sort definitions by mode-specific precedence
-    varState.definitions.sort(
-      (a, b) =>
-        getSourcePrecedence(a.source, mode) -
-        getSourcePrecedence(b.source, mode),
-    );
-
-    if (varState.definitions.length > 1) {
-      const lastDef = varState.definitions[varState.definitions.length - 1];
-
-      if (!lastDef) {
-        continue;
-      }
-
-      const highestPrecedence = getSourcePrecedence(lastDef.source, mode);
-
-      varState.isOverridden = true;
-      varState.effectiveValue = lastDef.value;
-      varState.effectiveSource = lastDef.source;
-
-      // Check for conflicts at highest precedence
-      const conflictingDefs = varState.definitions.filter(
-        (def) => getSourcePrecedence(def.source, mode) === highestPrecedence,
-      );
-
-      if (conflictingDefs.length > 1) {
-        varState.effectiveSource = `${varState.effectiveSource}`;
-      }
-    }
-  }
-
-  // after computing the effective values, we can check for errors
-  for (const key in variableMap) {
-    const model = envVariables.find((v) => key === v.name);
-    const varState = variableMap[key];
-
-    if (!varState) {
-      continue;
-    }
-
-    let validation: {
-      success: boolean;
-      error: {
-        issues: string[];
-      };
-    } = { success: true, error: { issues: [] } };
-
-    if (model) {
-      const allVariables = Object.values(variableMap).reduce(
-        (acc, variable) => {
-          return {
-            ...acc,
-            [variable.key]: variable.effectiveValue,
-          };
-        },
-        {} as Record<string, string>,
-      );
-
-      // First check if it's required but missing
-      if (model.required && !varState.effectiveValue) {
-        validation = {
-          success: false,
-          error: {
-            issues: [
-              `This variable is required but missing from your environment files`,
-            ],
-          },
-        };
-      } else if (model.contextualValidation) {
-        // Then check contextual validation
-        const dependenciesMet = model.contextualValidation.dependencies.some(
-          (dep) => {
-            const dependencyValue = allVariables[dep.variable] ?? '';
-
-            return dep.condition(dependencyValue, allVariables);
-          },
-        );
-
-        if (dependenciesMet) {
-          // Only check for missing value or run validation if dependencies are met
-          if (!varState.effectiveValue) {
-            const dependencyErrors = model.contextualValidation.dependencies
-              .map((dep) => {
-                const dependencyValue = allVariables[dep.variable] ?? '';
-
-                const shouldValidate = dep.condition(
-                  dependencyValue,
-                  allVariables,
-                );
-
-                if (shouldValidate) {
-                  const { success } = model.contextualValidation!.validate({
-                    value: varState.effectiveValue,
-                    variables: allVariables,
-                    mode,
-                  });
-
-                  if (success) {
-                    return null;
-                  }
-
-                  return dep.message;
-                }
-
-                return null;
-              })
-              .filter((message): message is string => message !== null);
-
-            validation = {
-              success: dependencyErrors.length === 0,
-              error: {
-                issues: dependencyErrors
-                  .map((message) => message)
-                  .filter((message) => !!message),
-              },
-            };
-          } else {
-            // If we have a value and dependencies are met, run contextual validation
-            const result = model.contextualValidation.validate({
-              value: varState.effectiveValue,
-              variables: allVariables,
-              mode,
-            });
-
-            if (!result.success) {
-              validation = {
-                success: false,
-                error: {
-                  issues: result.error.issues
-                    .map((issue) => issue.message)
-                    .filter((message) => !!message),
-                },
-              };
-            }
-          }
-        }
-      } else if (model.validate && varState.effectiveValue) {
-        // Only run regular validation if:
-        // 1. There's no contextual validation
-        // 2. There's a value to validate
-        const result = model.validate({
-          value: varState.effectiveValue,
-          variables: allVariables,
-          mode,
-        });
-
-        if (!result.success) {
-          validation = {
-            success: false,
-            error: {
-              issues: result.error.issues
-                .map((issue) => issue.message)
-                .filter((message) => !!message),
-            },
-          };
-        }
-      }
-    }
-
-    varState.validation = validation;
-  }
-
-  // Final pass: Validate missing variables that are marked as required
-  // or as having contextual validation
-  for (const model of envVariables) {
-    // If the variable exists in appState, use that
-    const existingVar = variableMap[model.name];
-
-    if (existingVar) {
-      // If the variable is already in the map, skip it
-      continue;
-    }
-
-    if (model.required || model.contextualValidation) {
-      if (model.contextualValidation) {
-        const allVariables = Object.values(variableMap).reduce(
-          (acc, variable) => {
-            return {
-              ...acc,
-              [variable.key]: variable.effectiveValue,
-            };
-          },
-          {} as Record<string, string>,
-        );
-
-        const errors =
-          model?.contextualValidation?.dependencies
-            .map((dep) => {
-              const dependencyValue = allVariables[dep.variable] ?? '';
-              const shouldValidate = dep.condition(
-                dependencyValue,
-                allVariables,
-              );
-
-              if (!shouldValidate) {
-                return [];
-              }
-
-              const effectiveValue = allVariables[dep.variable] ?? '';
-
-              const validation = model.contextualValidation!.validate({
-                value: effectiveValue,
-                variables: allVariables,
-                mode,
-              });
-
-              if (validation) {
-                return [dep.message];
-              }
-
-              return [];
-            })
-            .flat() ?? ([] as string[]);
-
-        if (errors.length === 0) {
-          continue;
-        } else {
-          variableMap[model.name] = {
-            key: model.name,
-            effectiveValue: '',
-            effectiveSource: 'MISSING',
-            isVisible: true,
-            category: model.category,
-            isOverridden: false,
-            definitions: [],
-            validation: {
-              success: false,
-              error: {
-                issues: errors.map((error) => error),
-              },
-            },
-          };
-        }
-      }
-
-      // If it doesn't exist but is required or has contextual validation, create an empty state
-      variableMap[model.name] = {
-        key: model.name,
-        effectiveValue: '',
-        effectiveSource: 'MISSING',
-        isVisible: true,
-        category: model.category,
-        isOverridden: false,
-        definitions: [],
-        validation: {
-          success: false,
-          error: {
-            issues: [
-              `This variable is required but missing from your environment files`,
-            ],
-          },
-        },
-      };
-    }
-  }
-
-  return {
-    appName: envInfo.appName,
-    filePath: envInfo.filePath,
-    mode,
-    variables: variableMap,
-  };
-}
-
-export async function getEnvState(
-  options: ScanOptions,
-): Promise<AppEnvState[]> {
-  const envInfos = await scanMonorepoEnv(options);
-  return envInfos.map((info) => processEnvDefinitions(info, options.mode));
-}
-
-export async function getVariable(key: string, mode: EnvMode) {
-  // Get the processed environment state for all apps (you can limit to 'web' via options)
-  const envStates = await getEnvState({ mode, apps: ['web'] });
-
-  // Find the state for the "web" app.
-  const webState = envStates.find((state) => state.appName === 'web');
-
-  // Return the effectiveValue based on override status.
-  return webState?.variables[key]?.effectiveValue ?? '';
-}

apps/dev-tool/app/variables/lib/server-actions.ts

@@ -2,83 +2,35 @@
 
 import { revalidatePath } from 'next/cache';
 
-import { envVariables } from '@/app/variables/lib/env-variables-model';
-import { existsSync, readFileSync, writeFileSync } from 'node:fs';
-import { resolve } from 'node:url';
 import { z } from 'zod';
 
+import {
+  createKitEnvDeps,
+  createKitEnvService,
+  findWorkspaceRoot,
+} from '@kit/mcp-server/env';
+
 const Schema = z.object({
   name: z.string().min(1),
   value: z.string(),
   mode: z.enum(['development', 'production']),
 });
 
-/**
- * Update the environment variable in the specified file.
- * @param props
- */
 export async function updateEnvironmentVariableAction(
   props: z.infer<typeof Schema>,
 ) {
-  // Validate the input
   const { name, mode, value } = Schema.parse(props);
-  const root = resolve(process.cwd(), '..');
-  const model = envVariables.find((item) => item.name === name);
 
-  // Determine the source file based on the mode
+  const rootPath = findWorkspaceRoot(process.cwd());
-  const source = (() => {
+  const service = createKitEnvService(createKitEnvDeps(rootPath));
-    const isSecret = model?.secret ?? true;
 
-    switch (mode) {
+  const result = await service.update({
-      case 'development':
+    key: name,
-        if (isSecret) {
+    value,
-          return '.env.local';
+    mode,
-        } else {
+  });
-          return '.env.development';
-        }
 
-      case 'production':
+  revalidatePath('/variables');
-        if (isSecret) {
-          return '.env.production.local';
-        } else {
-          return '.env.production';
-        }
 
-      default:
+  return result;
-        throw new Error(`Invalid mode: ${mode}`);
-    }
-  })();
-
-  // check file exists, if not, create it
-  const filePath = `${root}/apps/web/${source}`;
-
-  if (!existsSync(filePath)) {
-    writeFileSync(filePath, '', 'utf8');
-  }
-
-  const sourceEnvFile = readFileSync(`${root}apps/web/${source}`, 'utf8');
-
-  let updatedEnvFile = '';
-  const isInSourceFile = sourceEnvFile.includes(name);
-  const isCommentedOut = sourceEnvFile.includes(`#${name}=`);
-
-  if (isInSourceFile && !isCommentedOut) {
-    updatedEnvFile = sourceEnvFile.replace(
-      new RegExp(`^${name}=.*`, 'm'),
-      `${name}=${value}`,
-    );
-  } else {
-    // if the key does not exist, append it to the end of the file
-    updatedEnvFile = `${sourceEnvFile}\n${name}=${value}`;
-  }
-
-  // write the updated content back to the file
-  writeFileSync(`${root}/apps/web/${source}`, updatedEnvFile, 'utf8');
-
-  revalidatePath(`/variables`);
-
-  return {
-    success: true,
-    message: `Updated ${name} in "${source}"`,
-  };
 }

apps/dev-tool/app/variables/page.tsx

@@ -1,12 +1,12 @@
 import { use } from 'react';
 
-import {
-  processEnvDefinitions,
-  scanMonorepoEnv,
-} from '@/app/variables/lib/env-scanner';
 import { EnvMode } from '@/app/variables/lib/types';
 
-import { AppBreadcrumbs } from '@kit/ui/app-breadcrumbs';
+import {
+  createKitEnvDeps,
+  createKitEnvService,
+  findWorkspaceRoot,
+} from '@kit/mcp-server/env';
 import { Page, PageBody, PageHeader } from '@kit/ui/page';
 
 import { AppEnvironmentVariablesManager } from './components/app-environment-variables-manager';
@@ -21,7 +21,7 @@ export const metadata = {
 
 export default function VariablesPage({ searchParams }: VariablesPageProps) {
   const { mode = 'development' } = use(searchParams);
-  const apps = use(scanMonorepoEnv({ mode }));
+  const apps = use(loadEnvStates(mode));
 
   return (
     <Page style={'custom'}>
@@ -36,19 +36,18 @@ export default function VariablesPage({ searchParams }: VariablesPageProps) {
 
         <PageBody className={'overflow-hidden'}>
           <div className={'flex h-full flex-1 flex-col space-y-4'}>
-            {apps.map((app) => {
+            {apps.map((app) => (
-              const appEnvState = processEnvDefinitions(app, mode);
+              <AppEnvironmentVariablesManager key={app.appName} state={app} />
-
+            ))}
-              return (
-                <AppEnvironmentVariablesManager
-                  key={app.appName}
-                  state={appEnvState}
-                />
-              );
-            })}
           </div>
         </PageBody>
       </div>
     </Page>
   );
 }
+
+async function loadEnvStates(mode: EnvMode) {
+  const rootPath = findWorkspaceRoot(process.cwd());
+  const service = createKitEnvService(createKitEnvDeps(rootPath));
+  return service.getAppState(mode);
+}

apps/dev-tool/components/app-sidebar.tsx

@@ -11,7 +11,6 @@ import {
   LanguagesIcon,
   LayoutDashboardIcon,
   MailIcon,
-  ServerIcon,
 } from 'lucide-react';
 
 import {
@@ -55,20 +54,14 @@ const routes = [
     Icon: LanguagesIcon,
   },
   {
-    label: 'MCP Server',
+    label: 'Database',
-    Icon: ServerIcon,
+    path: '/database',
-    children: [
+    Icon: DatabaseIcon,
-      {
+  },
-        label: 'Database',
+  {
-        path: '/mcp-server/database',
+    label: 'PRD Manager',
-        Icon: DatabaseIcon,
+    path: '/prds',
-      },
+    Icon: FileTextIcon,
-      {
-        label: 'PRD Manager',
-        path: '/mcp-server/prds',
-        Icon: FileTextIcon,
-      },
-    ],
   },
 ];
 

apps/dev-tool/components/status-tile.tsx

@@ -2,12 +2,13 @@
 
 import { AlertCircle, CheckCircle2, XCircle } from 'lucide-react';
 
-import { Alert, AlertDescription, AlertTitle } from '@kit/ui/alert';
 import { Card, CardContent } from '@kit/ui/card';
 
 export const ServiceStatus = {
   CHECKING: 'checking',
   SUCCESS: 'success',
+  WARNING: 'warning',
+  INFO: 'info',
   ERROR: 'error',
 } as const;
 
@@ -16,6 +17,8 @@ type ServiceStatusType = (typeof ServiceStatus)[keyof typeof ServiceStatus];
 const StatusIcons = {
   [ServiceStatus.CHECKING]: <AlertCircle className="h-6 w-6 text-yellow-500" />,
   [ServiceStatus.SUCCESS]: <CheckCircle2 className="h-6 w-6 text-green-500" />,
+  [ServiceStatus.WARNING]: <AlertCircle className="h-6 w-6 text-amber-500" />,
+  [ServiceStatus.INFO]: <AlertCircle className="h-6 w-6 text-blue-500" />,
   [ServiceStatus.ERROR]: <XCircle className="h-6 w-6 text-red-500" />,
 };
 
@@ -30,7 +33,7 @@ interface ServiceCardProps {
 export const ServiceCard = ({ name, status }: ServiceCardProps) => {
   return (
     <Card className="w-full max-w-2xl">
-      <CardContent className="pt-6">
+      <CardContent className="p-4">
         <div className="space-y-4">
           <div className="flex items-center justify-between">
             <div className="flex items-center space-x-4">

apps/e2e/package.json

@@ -11,7 +11,7 @@
   },
   "author": "Makerkit",
   "devDependencies": {
-    "@playwright/test": "^1.58.1",
+    "@playwright/test": "^1.58.2",
     "@supabase/supabase-js": "catalog:",
     "@types/node": "catalog:",
     "dotenv": "17.2.4",

apps/web/AGENTS.md

@@ -22,6 +22,7 @@ app/
 
 For specialized implementation:
 - `/feature-builder` - End-to-end feature implementation
+- `/service-builder` - Server side services
 - `/server-action-builder` - Server actions
 - `/forms-builder` - Forms with validation
 - `/navigation-config` - Adding routes and menu items

apps/web/app/(marketing)/changelog/[slug]/page.tsx

@@ -72,10 +72,10 @@ export async function generateMetadata({
       url: data.entry.url,
       images: image
         ? [
-          {
+            {
-            url: image,
+              url: image,
-          },
+            },
-        ]
+          ]
         : [],
     },
     twitter: {

apps/web/app/admin/AGENTS.md

@@ -6,6 +6,7 @@
 - **ALWAYS** validate admin status before operations
 - **NEVER** bypass authentication or authorization
 - **ALWAYS** audit admin operations with logging
+- **ALWAYS** use `adminAction` to wrap admin actions @packages/features/admin/src/lib/server/utils/admin-action.ts
 
 ## Page Structure
 

apps/web/components/error-page-content.tsx

@@ -69,7 +69,7 @@ export function ErrorPageContent({
           ) : (
             <Button asChild>
               <Link href={backLink}>
-                <ArrowLeft className={'h-4 w-4 mr-1'} />
+                <ArrowLeft className={'mr-1 h-4 w-4'} />
                 <Trans i18nKey={backLabel} />
               </Link>
             </Button>
@@ -77,7 +77,7 @@ export function ErrorPageContent({
 
           <Button asChild variant={'ghost'}>
             <Link href={'/contact'}>
-              <MessageCircleQuestion className={'h-4 w-4 mr-1'} />
+              <MessageCircleQuestion className={'mr-1 h-4 w-4'} />
               <Trans i18nKey={contactLabel} />
             </Link>
           </Button>

apps/web/next.config.mjs

@@ -34,7 +34,7 @@ const config = {
       fullUrl: true,
     },
   },
-  serverExternalPackages: ['pino', 'thread-stream'],
+  serverExternalPackages: [],
   // needed for supporting dynamic imports for local content
   outputFileTracingIncludes: {
     '/*': ['./content/**/*'],

package.json

@@ -1,6 +1,6 @@
 {
   "name": "next-supabase-saas-kit-turbo",
-  "version": "2.23.14",
+  "version": "2.24.0",
   "private": true,
   "sideEffects": false,
   "engines": {
@@ -48,7 +48,7 @@
     "@turbo/gen": "^2.7.6",
     "cross-env": "^10.0.0",
     "prettier": "^3.8.1",
-    "turbo": "2.7.6",
+    "turbo": "2.8.5",
     "typescript": "^5.9.3"
   }
 }

packages/email-templates/AGENTS.md

@@ -0,0 +1,22 @@
+# Email Templates Instructions
+
+This package owns transactional email templates and renderers using React Email.
+
+## Non-negotiables
+
+1. New email must be added to `src/registry.ts` (`EMAIL_TEMPLATE_RENDERERS`) or dynamic inclusion/discovery will miss it.
+2. New email renderer must be exported from `src/index.ts`.
+3. Renderer contract: async function returning `{ html, subject }`.
+4. i18n namespace must match locale filename in `src/locales/<lang>/<namespace>.json`.
+5. Reuse shared primitives in `src/components/*` for layout/style consistency.
+6. Include one clear CTA and a plain URL fallback in body copy.
+7. Keep subject/body concise, action-first, non-spammy.
+
+## When adding a new email
+
+1. Add template in `src/emails/*.email.tsx`.
+2. Add locale file in `src/locales/en/*-email.json` if template uses i18n.
+3. Export template renderer from `src/index.ts`.
+4. Add renderer to `src/registry.ts` (`EMAIL_TEMPLATE_RENDERERS`).
+
+`src/registry.ts` is required for dynamic inclusion/discovery. If not added there, dynamic template listing/rendering will miss it.

packages/email-templates/CLAUDE.md

@@ -0,0 +1 @@
+@AGENTS.md

packages/email-templates/package.json

@@ -10,7 +10,8 @@
   },
   "prettier": "@kit/prettier-config",
   "exports": {
-    ".": "./src/index.ts"
+    ".": "./src/index.ts",
+    "./registry": "./src/registry.ts"
   },
   "dependencies": {
     "@react-email/components": "catalog:"
@@ -20,7 +21,10 @@
     "@kit/i18n": "workspace:*",
     "@kit/prettier-config": "workspace:*",
     "@kit/tsconfig": "workspace:*",
-    "@types/node": "catalog:"
+    "@types/node": "catalog:",
+    "@types/react": "catalog:",
+    "react": "catalog:",
+    "react-dom": "catalog:"
   },
   "typesVersions": {
     "*": {

packages/email-templates/src/registry.ts

@@ -0,0 +1,39 @@
+import { renderAccountDeleteEmail } from './emails/account-delete.email';
+import { renderInviteEmail } from './emails/invite.email';
+import { renderOtpEmail } from './emails/otp.email';
+
+/**
+ * Registry of email template renderers.
+ *
+ * This is used to render email templates dynamically. Ex. list all available email templates in the MCP server.
+ *
+ * @example
+ *
+ * const { html, subject } = await renderAccountDeleteEmail({
+ *   userDisplayName: 'John Doe',
+ *   productName: 'My SaaS App',
+ * });
+ *
+ * await mailer.sendEmail({
+ *   to: 'user@example.com',
+ *   from: 'noreply@yourdomain.com',
+ *   subject,
+ *   html,
+ * });
+ *
+ * @example
+ *
+ * const { html, subject } = await renderAccountDeleteEmail({
+ *   userDisplayName: 'John Doe',
+ *   productName: 'My SaaS App',
+ * });
+ *
+ */
+export const EMAIL_TEMPLATE_RENDERERS = {
+  'account-delete-email': renderAccountDeleteEmail,
+  'invite-email': renderInviteEmail,
+  'otp-email': renderOtpEmail,
+};
+
+export type EmailTemplateRenderer =
+  (typeof EMAIL_TEMPLATE_RENDERERS)[keyof typeof EMAIL_TEMPLATE_RENDERERS];

packages/i18n/src/create-i18n-settings.ts

@@ -22,6 +22,7 @@ export function createI18nSettings({
     supportedLngs: languages,
     fallbackLng: languages[0],
     detection: undefined,
+    showSupportNotice: false,
     lng,
     preload: false as const,
     lowerCaseLng: true as const,

packages/i18n/src/i18n.client.ts

@@ -42,6 +42,7 @@ export async function initializeI18nClient(
     .init(
       {
         ...settings,
+        showSupportNotice: false,
         detection: {
           order: ['cookie', 'htmlTag', 'navigator'],
           caches: ['cookie'],

packages/mcp-server/AGENTS.md

@@ -0,0 +1,16 @@
+# MCP Server Instructions
+
+This package owns Makerkit MCP tool/resource registration and adapters.
+
+## Non-negotiables
+
+1. Use service pattern: keep business/domain logic in `*.service.ts`, not MCP handlers.
+2. `index.ts` in each tool folder is adapter only: parse input, call service, map output/errors.
+3. Inject deps via `create*Deps` + `create*Service`; avoid hidden globals/singletons.
+4. Keep schemas in `schema.ts`; validate all tool input with zod before service call.
+5. Export public registration + service factory/types from each tool `index.ts`.
+6. Add/maintain unit tests for service behavior and tool adapter behavior.
+7. Register new tools/resources in `src/index.ts`.
+8. Keep tool responses structured + stable; avoid breaking output shapes.
+
+Service pattern is required to decouple logic from MCP server transport and keep logic testable/reusable.

packages/mcp-server/CLAUDE.md

@@ -0,0 +1 @@
+@AGENTS.md

packages/mcp-server/package.json

@@ -2,10 +2,10 @@
   "name": "@kit/mcp-server",
   "private": true,
   "version": "0.1.0",
-  "main": "./build/index.js",
+  "type": "module",
-  "module": true,
+  "main": "./build/index.cjs",
   "bin": {
-    "makerkit-mcp-server": "./build/index.js"
+    "makerkit-mcp-server": "./build/index.cjs"
   },
   "exports": {
     "./database": "./src/tools/database.ts",
@@ -13,28 +13,37 @@
     "./migrations": "./src/tools/migrations.ts",
     "./prd-manager": "./src/tools/prd-manager.ts",
     "./prompts": "./src/tools/prompts.ts",
-    "./scripts": "./src/tools/scripts.ts"
+    "./scripts": "./src/tools/scripts.ts",
+    "./status": "./src/tools/status/index.ts",
+    "./prerequisites": "./src/tools/prerequisites/index.ts",
+    "./env": "./src/tools/env/index.ts",
+    "./env/model": "./src/tools/env/model.ts",
+    "./env/types": "./src/tools/env/types.ts",
+    "./dev": "./src/tools/dev/index.ts",
+    "./db": "./src/tools/db/index.ts",
+    "./emails": "./src/tools/emails/index.ts",
+    "./translations": "./src/tools/translations/index.ts",
+    "./run-checks": "./src/tools/run-checks/index.ts",
+    "./deps-upgrade-advisor": "./src/tools/deps-upgrade-advisor/index.ts"
   },
   "scripts": {
     "clean": "rm -rf .turbo node_modules",
     "format": "prettier --check \"**/*.{mjs,ts,md,json}\"",
-    "build": "tsc",
+    "build": "tsup",
-    "build:watch": "tsc --watch"
+    "build:watch": "tsup --watch",
+    "test:unit": "vitest run"
   },
   "devDependencies": {
+    "@kit/email-templates": "workspace:*",
     "@kit/prettier-config": "workspace:*",
     "@kit/tsconfig": "workspace:*",
     "@modelcontextprotocol/sdk": "1.26.0",
     "@types/node": "catalog:",
     "postgres": "3.4.8",
+    "tsup": "catalog:",
+    "typescript": "^5.9.3",
+    "vitest": "^4.0.18",
     "zod": "catalog:"
   },
-  "prettier": "@kit/prettier-config",
+  "prettier": "@kit/prettier-config"
-  "typesVersions": {
-    "*": {
-      "*": [
-        "src/*"
-      ]
-    }
-  }
 }

packages/mcp-server/src/index.ts

@@ -6,10 +6,20 @@ import {
   registerDatabaseResources,
   registerDatabaseTools,
 } from './tools/database';
+import { registerKitDbTools } from './tools/db/index';
+import { registerDepsUpgradeAdvisorTool } from './tools/deps-upgrade-advisor/index';
+import { registerKitDevTools } from './tools/dev/index';
+import { registerKitEmailTemplatesTools } from './tools/emails/index';
+import { registerKitEnvTools } from './tools/env/index';
+import { registerKitEmailsTools } from './tools/mailbox/index';
 import { registerGetMigrationsTools } from './tools/migrations';
 import { registerPRDTools } from './tools/prd-manager';
+import { registerKitPrerequisitesTool } from './tools/prerequisites/index';
 import { registerPromptsSystem } from './tools/prompts';
+import { registerRunChecksTool } from './tools/run-checks/index';
 import { registerScriptsTools } from './tools/scripts';
+import { registerKitStatusTool } from './tools/status/index';
+import { registerKitTranslationsTools } from './tools/translations/index';
 
 async function main() {
   // Create server instance
@@ -21,10 +31,20 @@ async function main() {
   const transport = new StdioServerTransport();
 
   registerGetMigrationsTools(server);
+  registerKitStatusTool(server);
+  registerKitPrerequisitesTool(server);
+  registerKitEnvTools(server);
+  registerKitDevTools(server);
+  registerKitDbTools(server);
+  registerKitEmailsTools(server);
+  registerKitEmailTemplatesTools(server);
+  registerKitTranslationsTools(server);
   registerDatabaseTools(server);
   registerDatabaseResources(server);
   registerComponentsTools(server);
   registerScriptsTools(server);
+  registerRunChecksTool(server);
+  registerDepsUpgradeAdvisorTool(server);
   registerPRDTools(server);
   registerPromptsSystem(server);
 

packages/mcp-server/src/tools/components.ts

@@ -1,7 +1,7 @@
 import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
 import { readFile } from 'node:fs/promises';
 import { join } from 'node:path';
-import { z } from 'zod';
+import { z } from 'zod/v3';
 
 interface ComponentInfo {
   name: string;
@@ -345,9 +345,12 @@ export function registerComponentsTools(server: McpServer) {
 }
 
 function createGetComponentsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_components',
-    'Get all available UI components from the @kit/ui package with descriptions',
+    {
+      description:
+        'Get all available UI components from the @kit/ui package with descriptions',
+    },
     async () => {
       const components = await ComponentsTool.getComponents();
 
@@ -371,13 +374,15 @@ function createGetComponentsTool(server: McpServer) {
 }
 
 function createGetComponentContentTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_component_content',
-    'Get the source code content of a specific UI component',
     {
-      state: z.object({
+      description: 'Get the source code content of a specific UI component',
-        componentName: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          componentName: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const content = await ComponentsTool.getComponentContent(
@@ -397,13 +402,16 @@ function createGetComponentContentTool(server: McpServer) {
 }
 
 function createComponentsSearchTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'components_search',
-    'Search UI components by keyword in name, description, or category',
     {
-      state: z.object({
+      description:
-        query: z.string(),
+        'Search UI components by keyword in name, description, or category',
-      }),
+      inputSchema: {
+        state: z.object({
+          query: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const components = await ComponentsTool.searchComponents(state.query);
@@ -439,13 +447,16 @@ function createComponentsSearchTool(server: McpServer) {
 }
 
 function createGetComponentPropsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_component_props',
-    'Extract component props, interfaces, and variants from a UI component',
     {
-      state: z.object({
+      description:
-        componentName: z.string(),
+        'Extract component props, interfaces, and variants from a UI component',
-      }),
+      inputSchema: {
+        state: z.object({
+          componentName: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const propsInfo = await ComponentsTool.getComponentProps(

packages/mcp-server/src/tools/database.ts

@@ -2,7 +2,7 @@ import { type McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
 import { readFile, readdir, stat } from 'node:fs/promises';
 import { join } from 'node:path';
 import postgres from 'postgres';
-import { z } from 'zod';
+import { z } from 'zod/v3';
 
 const DATABASE_URL =
   process.env.DATABASE_URL ||
@@ -1135,9 +1135,12 @@ export function registerDatabaseResources(server: McpServer) {
 }
 
 function createGetSchemaFilesTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_schema_files',
-    '🔥 DATABASE SCHEMA FILES (SOURCE OF TRUTH - ALWAYS CURRENT) - Use these over migrations!',
+    {
+      description:
+        '🔥 DATABASE SCHEMA FILES (SOURCE OF TRUTH - ALWAYS CURRENT) - Use these over migrations!',
+    },
     async () => {
       const schemaFiles = await DatabaseTool.getSchemaFiles();
 
@@ -1168,9 +1171,12 @@ function createGetSchemaFilesTool(server: McpServer) {
 }
 
 function createGetFunctionsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_database_functions',
-    'Get all database functions with descriptions and usage guidance',
+    {
+      description:
+        'Get all database functions with descriptions and usage guidance',
+    },
     async () => {
       const functions = await DatabaseTool.getFunctions();
 
@@ -1202,13 +1208,16 @@ function createGetFunctionsTool(server: McpServer) {
 }
 
 function createGetFunctionDetailsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_function_details',
-    'Get detailed information about a specific database function',
     {
-      state: z.object({
+      description:
-        functionName: z.string(),
+        'Get detailed information about a specific database function',
-      }),
+      inputSchema: {
+        state: z.object({
+          functionName: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const func = await DatabaseTool.getFunctionDetails(state.functionName);
@@ -1253,13 +1262,15 @@ Source File: ${func.sourceFile}`,
 }
 
 function createSearchFunctionsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'search_database_functions',
-    'Search database functions by name, description, or purpose',
     {
-      state: z.object({
+      description: 'Search database functions by name, description, or purpose',
-        query: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          query: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const functions = await DatabaseTool.searchFunctions(state.query);
@@ -1295,13 +1306,16 @@ function createSearchFunctionsTool(server: McpServer) {
 }
 
 function createGetSchemaContentTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_schema_content',
-    '📋 Get raw schema file content (CURRENT DATABASE STATE) - Source of truth for database structure',
     {
-      state: z.object({
+      description:
-        fileName: z.string(),
+        '📋 Get raw schema file content (CURRENT DATABASE STATE) - Source of truth for database structure',
-      }),
+      inputSchema: {
+        state: z.object({
+          fileName: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const content = await DatabaseTool.getSchemaContent(state.fileName);
@@ -1319,13 +1333,16 @@ function createGetSchemaContentTool(server: McpServer) {
 }
 
 function createGetSchemasByTopicTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_schemas_by_topic',
-    '🎯 Find schema files by topic (accounts, auth, billing, permissions, etc.) - Fastest way to find relevant schemas',
     {
-      state: z.object({
+      description:
-        topic: z.string(),
+        '🎯 Find schema files by topic (accounts, auth, billing, permissions, etc.) - Fastest way to find relevant schemas',
-      }),
+      inputSchema: {
+        state: z.object({
+          topic: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const schemas = await DatabaseTool.getSchemasByTopic(state.topic);
@@ -1368,13 +1385,16 @@ function createGetSchemasByTopicTool(server: McpServer) {
 }
 
 function createGetSchemaBySectionTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_schema_by_section',
-    '📂 Get specific schema by section name (Accounts, Permissions, etc.) - Direct access to schema sections',
     {
-      state: z.object({
+      description:
-        section: z.string(),
+        '📂 Get specific schema by section name (Accounts, Permissions, etc.) - Direct access to schema sections',
-      }),
+      inputSchema: {
+        state: z.object({
+          section: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const schema = await DatabaseTool.getSchemaBySection(state.section);
@@ -1414,9 +1434,12 @@ function createGetSchemaBySectionTool(server: McpServer) {
 }
 
 function createDatabaseSummaryTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_database_summary',
-    '📊 Get comprehensive database overview with tables, enums, and functions',
+    {
+      description:
+        '📊 Get comprehensive database overview with tables, enums, and functions',
+    },
     async () => {
       const tables = await DatabaseTool.getAllProjectTables();
       const enums = await DatabaseTool.getAllEnums();
@@ -1468,9 +1491,11 @@ function createDatabaseSummaryTool(server: McpServer) {
 }
 
 function createDatabaseTablesListTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_database_tables',
-    '📋 Get list of all project-defined database tables',
+    {
+      description: '📋 Get list of all project-defined database tables',
+    },
     async () => {
       const tables = await DatabaseTool.getAllProjectTables();
 
@@ -1487,14 +1512,17 @@ function createDatabaseTablesListTool(server: McpServer) {
 }
 
 function createGetTableInfoTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_table_info',
-    '🗂️ Get detailed table schema with columns, foreign keys, and indexes',
     {
-      state: z.object({
+      description:
-        schema: z.string().default('public'),
+        '🗂️ Get detailed table schema with columns, foreign keys, and indexes',
-        tableName: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          schema: z.string().default('public'),
+          tableName: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       try {
@@ -1526,13 +1554,15 @@ function createGetTableInfoTool(server: McpServer) {
 }
 
 function createGetEnumInfoTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_enum_info',
-    '🏷️ Get enum type definition with all possible values',
     {
-      state: z.object({
+      description: '🏷️ Get enum type definition with all possible values',
-        enumName: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          enumName: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       try {
@@ -1573,9 +1603,11 @@ function createGetEnumInfoTool(server: McpServer) {
 }
 
 function createGetAllEnumsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_all_enums',
-    '🏷️ Get all enum types and their values',
+    {
+      description: '🏷️ Get all enum types and their values',
+    },
     async () => {
       try {
         const enums = await DatabaseTool.getAllEnums();

packages/mcp-server/src/tools/db/__tests__/kit-db.service.test.ts

@@ -0,0 +1,248 @@
+import { describe, expect, it, vi } from 'vitest';
+
+import { type KitDbServiceDeps, createKitDbService } from '../kit-db.service';
+
+function createDeps(
+  overrides: Partial<KitDbServiceDeps> = {},
+): KitDbServiceDeps {
+  return {
+    rootPath: '/repo',
+    async resolveVariantContext() {
+      return {
+        variant: 'next-supabase',
+        variantFamily: 'supabase',
+        tool: 'supabase',
+      };
+    },
+    async executeCommand() {
+      return { stdout: '', stderr: '', exitCode: 0 };
+    },
+    async isPortOpen() {
+      return false;
+    },
+    async fileExists() {
+      return false;
+    },
+    async readdir() {
+      return [];
+    },
+    async readJsonFile() {
+      return {};
+    },
+    ...overrides,
+  };
+}
+
+describe('KitDbService.status', () => {
+  it('reports pending migrations when CLI output is unavailable', async () => {
+    const deps = createDeps({
+      async fileExists(path: string) {
+        return path.includes('supabase/migrations');
+      },
+      async readdir() {
+        return ['20260101010101_create_table.sql'];
+      },
+      async executeCommand() {
+        throw new Error('supabase missing');
+      },
+    });
+
+    const service = createKitDbService(deps);
+    const result = await service.status();
+
+    expect(result.migrations.pending).toBe(1);
+    expect(result.migrations.pending_names).toEqual([
+      '20260101010101_create_table',
+    ]);
+  });
+
+  it('treats local migrations as applied when connected', async () => {
+    const deps = createDeps({
+      async fileExists(path: string) {
+        return path.includes('supabase/migrations');
+      },
+      async readdir() {
+        return ['20260101010101_create_table.sql'];
+      },
+      async executeCommand() {
+        throw new Error('supabase missing');
+      },
+      async isPortOpen() {
+        return true;
+      },
+    });
+
+    const service = createKitDbService(deps);
+    const result = await service.status();
+
+    expect(result.migrations.applied).toBe(1);
+    expect(result.migrations.pending).toBe(0);
+  });
+
+  it('parses supabase migrations list output', async () => {
+    const deps = createDeps({
+      async executeCommand(command, args) {
+        if (command === 'supabase' && args.join(' ') === 'migrations list') {
+          return {
+            stdout:
+              '20260101010101_create_table | applied\n20260202020202_add_billing | not applied\n',
+            stderr: '',
+            exitCode: 0,
+          };
+        }
+
+        return { stdout: '', stderr: '', exitCode: 0 };
+      },
+    });
+
+    const service = createKitDbService(deps);
+    const result = await service.status();
+
+    expect(result.migrations.applied).toBe(1);
+    expect(result.migrations.pending).toBe(1);
+    expect(result.migrations.pending_names).toEqual([
+      '20260202020202_add_billing',
+    ]);
+  });
+
+  it('maps id/name columns to local migration names', async () => {
+    const deps = createDeps({
+      async fileExists(path: string) {
+        return path.includes('supabase/migrations');
+      },
+      async readdir() {
+        return ['20240319163440_roles-seed.sql'];
+      },
+      async executeCommand(command, args) {
+        if (command === 'supabase' && args.join(' ') === 'migrations list') {
+          return {
+            stdout:
+              '20240319163440 | roles-seed | Applied\n20240401010101 | add-billing | Pending\n',
+            stderr: '',
+            exitCode: 0,
+          };
+        }
+
+        return { stdout: '', stderr: '', exitCode: 0 };
+      },
+    });
+
+    const service = createKitDbService(deps);
+    const result = await service.status();
+
+    expect(result.migrations.applied).toBe(1);
+    expect(result.migrations.pending).toBe(1);
+    expect(result.migrations.pending_names).toEqual([
+      '20240401010101_add-billing',
+    ]);
+  });
+
+  it('treats id/name list with no status as applied', async () => {
+    const deps = createDeps({
+      async fileExists(path: string) {
+        return path.includes('supabase/migrations');
+      },
+      async readdir() {
+        return [
+          '20240319163440_roles-seed.sql',
+          '20240401010101_add-billing.sql',
+        ];
+      },
+      async executeCommand(command, args) {
+        if (command === 'supabase' && args.join(' ') === 'migrations list') {
+          return {
+            stdout:
+              '20240319163440 | roles-seed\n20240401010101 | add-billing\n',
+            stderr: '',
+            exitCode: 0,
+          };
+        }
+
+        return { stdout: '', stderr: '', exitCode: 0 };
+      },
+    });
+
+    const service = createKitDbService(deps);
+    const result = await service.status();
+
+    expect(result.migrations.applied).toBe(2);
+    expect(result.migrations.pending).toBe(0);
+  });
+});
+
+describe('KitDbService.migrate', () => {
+  it('throws when target is not latest', async () => {
+    const service = createKitDbService(createDeps());
+
+    await expect(
+      service.migrate({ target: '20260101010101_create_table' }),
+    ).rejects.toThrow(/target "latest"/);
+  });
+
+  it('returns applied migrations from pending list', async () => {
+    const deps = createDeps({
+      async fileExists(path: string) {
+        return path.includes('supabase/migrations');
+      },
+      async readdir() {
+        return ['20260101010101_create_table.sql'];
+      },
+      async executeCommand(command, args) {
+        if (command === 'supabase' && args.join(' ') === 'migrations list') {
+          return {
+            stdout: '20260101010101_create_table | pending\n',
+            stderr: '',
+            exitCode: 0,
+          };
+        }
+
+        return { stdout: '', stderr: '', exitCode: 0 };
+      },
+    });
+
+    const service = createKitDbService(deps);
+    const result = await service.migrate({ target: 'latest' });
+
+    expect(result.applied).toEqual(['20260101010101_create_table']);
+    expect(result.total_applied).toBe(1);
+  });
+});
+
+describe('KitDbService.reset', () => {
+  it('requires confirm true', async () => {
+    const service = createKitDbService(createDeps());
+
+    await expect(service.reset({ confirm: false })).rejects.toThrow(
+      /confirm: true/,
+    );
+  });
+});
+
+describe('KitDbService.seed', () => {
+  it('uses db:seed script when available', async () => {
+    const exec = vi.fn(async (_command: string, _args: string[]) => ({
+      stdout: '',
+      stderr: '',
+      exitCode: 0,
+    }));
+
+    const deps = createDeps({
+      async readJsonFile() {
+        return { scripts: { 'db:seed': 'tsx scripts/seed.ts' } };
+      },
+      async executeCommand(command, args) {
+        return exec(command, args);
+      },
+    });
+
+    const service = createKitDbService(deps);
+    await service.seed();
+
+    expect(exec).toHaveBeenCalledWith('pnpm', [
+      '--filter',
+      'web',
+      'run',
+      'db:seed',
+    ]);
+  });
+});

packages/mcp-server/src/tools/db/index.ts

@@ -0,0 +1,365 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { execFile } from 'node:child_process';
+import { access, readFile, readdir } from 'node:fs/promises';
+import { Socket } from 'node:net';
+import { join } from 'node:path';
+import { promisify } from 'node:util';
+
+import { type KitDbServiceDeps, createKitDbService } from './kit-db.service';
+import {
+  KitDbMigrateInputSchema,
+  KitDbMigrateOutputSchema,
+  KitDbResetInputSchema,
+  KitDbResetOutputSchema,
+  KitDbSeedInputSchema,
+  KitDbSeedOutputSchema,
+  KitDbStatusInputSchema,
+  KitDbStatusOutputSchema,
+} from './schema';
+
+const execFileAsync = promisify(execFile);
+
+type TextContent = {
+  type: 'text';
+  text: string;
+};
+
+export function registerKitDbTools(server: McpServer) {
+  const service = createKitDbService(createKitDbDeps());
+
+  server.registerTool(
+    'kit_db_status',
+    {
+      description: 'Check database connectivity and migrations state',
+      inputSchema: KitDbStatusInputSchema,
+      outputSchema: KitDbStatusOutputSchema,
+    },
+    async (input) => {
+      KitDbStatusInputSchema.parse(input);
+
+      try {
+        const result = await service.status();
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_db_status', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_db_migrate',
+    {
+      description: 'Apply pending database migrations',
+      inputSchema: KitDbMigrateInputSchema,
+      outputSchema: KitDbMigrateOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitDbMigrateInputSchema.parse(input);
+        const result = await service.migrate(parsed);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_db_migrate', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_db_seed',
+    {
+      description: 'Run database seed scripts',
+      inputSchema: KitDbSeedInputSchema,
+      outputSchema: KitDbSeedOutputSchema,
+    },
+    async (input) => {
+      KitDbSeedInputSchema.parse(input);
+
+      try {
+        const result = await service.seed();
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_db_seed', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_db_reset',
+    {
+      description: 'Reset the database after confirmation',
+      inputSchema: KitDbResetInputSchema,
+      outputSchema: KitDbResetOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitDbResetInputSchema.parse(input);
+        const result = await service.reset(parsed);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_db_reset', error);
+      }
+    },
+  );
+}
+
+export function createKitDbDeps(rootPath = process.cwd()): KitDbServiceDeps {
+  return {
+    rootPath,
+    async resolveVariantContext() {
+      const configuredVariant = await readConfiguredVariant(rootPath);
+      if (configuredVariant) {
+        return mapVariant(configuredVariant);
+      }
+
+      if (await pathExists(join(rootPath, 'apps', 'web', 'supabase'))) {
+        return mapVariant('next-supabase');
+      }
+
+      const webPackage = await readJsonIfPresent(
+        join(rootPath, 'apps', 'web', 'package.json'),
+      );
+      const dependencies = {
+        ...(webPackage?.dependencies ?? {}),
+        ...(webPackage?.devDependencies ?? {}),
+      } as Record<string, unknown>;
+
+      if ('prisma' in dependencies || '@prisma/client' in dependencies) {
+        return mapVariant('next-prisma');
+      }
+
+      if ('drizzle-kit' in dependencies || 'drizzle-orm' in dependencies) {
+        return mapVariant('next-drizzle');
+      }
+
+      return mapVariant('next-supabase');
+    },
+    async executeCommand(command: string, args: string[]) {
+      const result = await executeWithFallback(rootPath, command, args);
+
+      return {
+        stdout: result.stdout,
+        stderr: result.stderr,
+        exitCode: 0,
+      };
+    },
+    async isPortOpen(port: number) {
+      return checkPort(port);
+    },
+    async fileExists(path: string) {
+      return pathExists(path);
+    },
+    async readdir(path: string) {
+      return readdir(path);
+    },
+    async readJsonFile(path: string) {
+      const raw = await readFile(path, 'utf8');
+      return JSON.parse(raw) as unknown;
+    },
+  };
+}
+
+function mapVariant(variant: string) {
+  if (variant === 'next-prisma') {
+    return {
+      variant,
+      variantFamily: 'orm',
+      tool: 'prisma',
+    } as const;
+  }
+
+  if (variant === 'next-drizzle') {
+    return {
+      variant,
+      variantFamily: 'orm',
+      tool: 'drizzle-kit',
+    } as const;
+  }
+
+  if (variant === 'react-router-supabase') {
+    return {
+      variant,
+      variantFamily: 'supabase',
+      tool: 'supabase',
+    } as const;
+  }
+
+  return {
+    variant: variant.includes('prisma') ? variant : 'next-supabase',
+    variantFamily: 'supabase',
+    tool: 'supabase',
+  } as const;
+}
+
+async function readConfiguredVariant(rootPath: string) {
+  const configPath = join(rootPath, '.makerkit', 'config.json');
+
+  try {
+    await access(configPath);
+    const config = JSON.parse(await readFile(configPath, 'utf8')) as Record<
+      string,
+      unknown
+    >;
+
+    return (
+      readString(config, 'variant') ??
+      readString(config, 'template') ??
+      readString(config, 'kitVariant')
+    );
+  } catch {
+    return null;
+  }
+}
+
+function readString(obj: Record<string, unknown>, key: string) {
+  const value = obj[key];
+  return typeof value === 'string' && value.length > 0 ? value : null;
+}
+
+async function executeWithFallback(
+  rootPath: string,
+  command: string,
+  args: string[],
+) {
+  try {
+    return await execFileAsync(command, args, {
+      cwd: rootPath,
+    });
+  } catch (error) {
+    if (isLocalCliCandidate(command)) {
+      const localBinCandidates = [
+        join(rootPath, 'node_modules', '.bin', command),
+        join(rootPath, 'apps', 'web', 'node_modules', '.bin', command),
+      ];
+
+      for (const localBin of localBinCandidates) {
+        try {
+          return await execFileAsync(localBin, args, {
+            cwd: rootPath,
+          });
+        } catch {
+          // Try next local binary candidate.
+        }
+      }
+
+      try {
+        return await execFileAsync('pnpm', ['exec', command, ...args], {
+          cwd: rootPath,
+        });
+      } catch {
+        return execFileAsync(
+          'pnpm',
+          ['--filter', 'web', 'exec', command, ...args],
+          {
+            cwd: rootPath,
+          },
+        );
+      }
+    }
+
+    if (command === 'pnpm' || command === 'docker') {
+      return execFileAsync(command, args, {
+        cwd: rootPath,
+      });
+    }
+
+    throw error;
+  }
+}
+
+function isLocalCliCandidate(command: string) {
+  return (
+    command === 'supabase' || command === 'drizzle-kit' || command === 'prisma'
+  );
+}
+
+async function pathExists(path: string) {
+  try {
+    await access(path);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function readJsonIfPresent(path: string) {
+  try {
+    const content = await readFile(path, 'utf8');
+    return JSON.parse(content) as {
+      dependencies?: Record<string, unknown>;
+      devDependencies?: Record<string, unknown>;
+    };
+  } catch {
+    return null;
+  }
+}
+
+async function checkPort(port: number) {
+  return new Promise<boolean>((resolve) => {
+    const socket = new Socket();
+
+    socket.setTimeout(200);
+
+    socket.once('connect', () => {
+      socket.destroy();
+      resolve(true);
+    });
+
+    socket.once('timeout', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.once('error', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.connect(port, '127.0.0.1');
+  });
+}
+
+function buildErrorResponse(tool: string, error: unknown) {
+  const message = `${tool} failed: ${toErrorMessage(error)}`;
+
+  return {
+    isError: true,
+    structuredContent: {
+      error: {
+        message,
+      },
+    },
+    content: buildTextContent(message),
+  };
+}
+
+function toErrorMessage(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+
+  return 'Unknown error';
+}
+
+function buildTextContent(text: string): TextContent[] {
+  return [{ type: 'text', text }];
+}
+
+export { createKitDbService } from './kit-db.service';
+export type { KitDbServiceDeps } from './kit-db.service';
+export type { KitDbStatusOutput } from './schema';

packages/mcp-server/src/tools/db/kit-db.service.ts

@@ -0,0 +1,505 @@
+import { join } from 'node:path';
+
+import type {
+  DbTool,
+  KitDbMigrateInput,
+  KitDbMigrateOutput,
+  KitDbResetInput,
+  KitDbResetOutput,
+  KitDbSeedOutput,
+  KitDbStatusOutput,
+} from './schema';
+
+type VariantFamily = 'supabase' | 'orm';
+
+interface CommandResult {
+  stdout: string;
+  stderr: string;
+  exitCode: number;
+}
+
+interface VariantContext {
+  variant: string;
+  variantFamily: VariantFamily;
+  tool: DbTool;
+}
+
+interface MigrationStatus {
+  applied: string[];
+  pending: string[];
+}
+
+interface SeedScript {
+  command: string;
+  args: string[];
+}
+
+export interface KitDbServiceDeps {
+  rootPath: string;
+  resolveVariantContext(): Promise<VariantContext>;
+  executeCommand(command: string, args: string[]): Promise<CommandResult>;
+  isPortOpen(port: number): Promise<boolean>;
+  fileExists(path: string): Promise<boolean>;
+  readdir(path: string): Promise<string[]>;
+  readJsonFile(path: string): Promise<unknown>;
+}
+
+const SUPABASE_PORT = 54321;
+const ORM_PORT = 5432;
+
+export function createKitDbService(deps: KitDbServiceDeps) {
+  return new KitDbService(deps);
+}
+
+export class KitDbService {
+  constructor(private readonly deps: KitDbServiceDeps) {}
+
+  async status(): Promise<KitDbStatusOutput> {
+    const variant = await this.deps.resolveVariantContext();
+    const connected = await this.isConnected(variant);
+    const migrations = await this.getMigrationSummary(variant, {
+      connected,
+    });
+
+    return {
+      connected,
+      tool: variant.tool,
+      migrations: {
+        applied: migrations.applied.length,
+        pending: migrations.pending.length,
+        pending_names: migrations.pending,
+      },
+    };
+  }
+
+  async migrate(input: KitDbMigrateInput): Promise<KitDbMigrateOutput> {
+    const variant = await this.deps.resolveVariantContext();
+
+    if (input.target !== 'latest') {
+      throw new Error(
+        `Specific migration targets are not supported for ${variant.tool} in this kit. Use target "latest".`,
+      );
+    }
+
+    const pending = await this.getPendingMigrationNames(variant);
+
+    await this.runMigrations(variant);
+
+    return {
+      applied: pending,
+      total_applied: pending.length,
+      status: 'success',
+    };
+  }
+
+  async seed(): Promise<KitDbSeedOutput> {
+    const variant = await this.deps.resolveVariantContext();
+    const seedScript = await this.resolveSeedScript(variant);
+
+    await this.deps.executeCommand(seedScript.command, seedScript.args);
+
+    return {
+      status: 'success',
+      message: 'Seed data applied successfully',
+    };
+  }
+
+  async reset(input: KitDbResetInput): Promise<KitDbResetOutput> {
+    if (!input.confirm) {
+      throw new Error('Database reset requires confirm: true');
+    }
+
+    const variant = await this.deps.resolveVariantContext();
+
+    if (variant.variantFamily === 'supabase') {
+      await this.deps.executeCommand('supabase', ['db', 'reset']);
+    } else {
+      await this.deps.executeCommand('docker', ['compose', 'down', '-v']);
+      await this.deps.executeCommand('docker', [
+        'compose',
+        'up',
+        '-d',
+        'postgres',
+      ]);
+      await this.runMigrations(variant);
+    }
+
+    return {
+      status: 'success',
+      message: 'Database reset and migrations re-applied',
+    };
+  }
+
+  private async isConnected(variant: VariantContext) {
+    const port =
+      variant.variantFamily === 'supabase' ? SUPABASE_PORT : ORM_PORT;
+    return this.deps.isPortOpen(port);
+  }
+
+  private async getMigrationSummary(
+    variant: VariantContext,
+    options: {
+      connected?: boolean;
+    } = {},
+  ): Promise<MigrationStatus> {
+    const localMigrations = await this.listLocalMigrations(variant);
+
+    if (variant.variantFamily === 'supabase') {
+      const parsed = await this.tryParseSupabaseMigrations(localMigrations);
+      if (parsed) {
+        return parsed;
+      }
+    }
+
+    if (
+      variant.variantFamily === 'supabase' &&
+      options.connected &&
+      localMigrations.length > 0
+    ) {
+      return {
+        applied: localMigrations,
+        pending: [],
+      };
+    }
+
+    return {
+      applied: [],
+      pending: localMigrations,
+    };
+  }
+
+  private async getPendingMigrationNames(variant: VariantContext) {
+    const summary = await this.getMigrationSummary(variant);
+    return summary.pending;
+  }
+
+  private async runMigrations(variant: VariantContext) {
+    if (variant.tool === 'supabase') {
+      await this.deps.executeCommand('supabase', ['db', 'push']);
+      return;
+    }
+
+    if (variant.tool === 'drizzle-kit') {
+      await this.deps.executeCommand('drizzle-kit', ['push']);
+      return;
+    }
+
+    await this.deps.executeCommand('prisma', ['db', 'push']);
+  }
+
+  private async resolveSeedScript(
+    variant: VariantContext,
+  ): Promise<SeedScript> {
+    const customScript = await this.findSeedScript();
+
+    if (customScript) {
+      return {
+        command: 'pnpm',
+        args: ['--filter', 'web', 'run', customScript],
+      };
+    }
+
+    if (variant.tool === 'supabase') {
+      return {
+        command: 'supabase',
+        args: ['db', 'seed'],
+      };
+    }
+
+    if (variant.tool === 'prisma') {
+      return {
+        command: 'prisma',
+        args: ['db', 'seed'],
+      };
+    }
+
+    throw new Error(
+      'No seed command configured. Add a db:seed or seed script to apps/web/package.json.',
+    );
+  }
+
+  private async findSeedScript() {
+    const packageJsonPath = join(
+      this.deps.rootPath,
+      'apps',
+      'web',
+      'package.json',
+    );
+
+    const packageJson = await this.readObject(packageJsonPath);
+    const scripts = this.readObjectValue(packageJson, 'scripts');
+
+    if (this.readString(scripts, 'db:seed')) {
+      return 'db:seed';
+    }
+
+    if (this.readString(scripts, 'seed')) {
+      return 'seed';
+    }
+
+    return null;
+  }
+
+  private async listLocalMigrations(variant: VariantContext) {
+    const migrationsDir = await this.resolveMigrationsDir(variant);
+
+    if (!migrationsDir) {
+      return [];
+    }
+
+    const entries = await this.deps.readdir(migrationsDir);
+    return this.filterMigrationNames(variant, entries);
+  }
+
+  private async resolveMigrationsDir(variant: VariantContext) {
+    if (variant.tool === 'supabase') {
+      const supabaseDir = join(
+        this.deps.rootPath,
+        'apps',
+        'web',
+        'supabase',
+        'migrations',
+      );
+      return (await this.deps.fileExists(supabaseDir)) ? supabaseDir : null;
+    }
+
+    if (variant.tool === 'prisma') {
+      const prismaDir = join(
+        this.deps.rootPath,
+        'apps',
+        'web',
+        'prisma',
+        'migrations',
+      );
+      return (await this.deps.fileExists(prismaDir)) ? prismaDir : null;
+    }
+
+    const drizzleDir = join(
+      this.deps.rootPath,
+      'apps',
+      'web',
+      'drizzle',
+      'migrations',
+    );
+
+    if (await this.deps.fileExists(drizzleDir)) {
+      return drizzleDir;
+    }
+
+    const fallbackDir = join(this.deps.rootPath, 'drizzle', 'migrations');
+    return (await this.deps.fileExists(fallbackDir)) ? fallbackDir : null;
+  }
+
+  private filterMigrationNames(variant: VariantContext, entries: string[]) {
+    if (variant.tool === 'prisma') {
+      return entries.filter((entry) => entry.trim().length > 0);
+    }
+
+    return entries
+      .filter((entry) => entry.endsWith('.sql'))
+      .map((entry) => entry.replace(/\.sql$/, ''));
+  }
+
+  private async tryParseSupabaseMigrations(localMigrations: string[]) {
+    try {
+      const localResult = await this.deps.executeCommand('supabase', [
+        'migrations',
+        'list',
+        '--local',
+      ]);
+      const parsedLocal = parseSupabaseMigrationsList(
+        localResult.stdout,
+        localMigrations,
+      );
+      if (parsedLocal) {
+        return parsedLocal;
+      }
+    } catch {
+      // Fall through to remote attempt.
+    }
+
+    try {
+      const remoteResult = await this.deps.executeCommand('supabase', [
+        'migrations',
+        'list',
+      ]);
+      return parseSupabaseMigrationsList(remoteResult.stdout, localMigrations);
+    } catch {
+      return null;
+    }
+  }
+
+  private async readObject(path: string): Promise<Record<string, unknown>> {
+    try {
+      const value = await this.deps.readJsonFile(path);
+
+      if (!value || typeof value !== 'object' || Array.isArray(value)) {
+        return {};
+      }
+
+      return value as Record<string, unknown>;
+    } catch {
+      return {};
+    }
+  }
+
+  private readObjectValue(obj: Record<string, unknown>, key: string) {
+    const value = obj[key];
+
+    if (!value || typeof value !== 'object' || Array.isArray(value)) {
+      return {};
+    }
+
+    return value as Record<string, unknown>;
+  }
+
+  private readString(obj: Record<string, unknown>, key: string) {
+    const value = obj[key];
+    return typeof value === 'string' && value.length > 0 ? value : null;
+  }
+}
+
+function parseSupabaseMigrationsList(
+  output: string,
+  localMigrations: string[],
+): MigrationStatus | null {
+  const applied = new Set<string>();
+  const pending = new Set<string>();
+  const appliedCandidates = new Set<string>();
+  const lines = output.split('\n');
+  const migrationsById = buildMigrationIdMap(localMigrations);
+  let sawStatus = false;
+  let sawId = false;
+
+  for (const line of lines) {
+    const trimmed = line.trim();
+    if (!trimmed) {
+      continue;
+    }
+
+    const status = extractSupabaseStatus(trimmed);
+    const nameFromLine = extractMigrationName(
+      trimmed,
+      localMigrations,
+      migrationsById,
+    );
+
+    if (nameFromLine) {
+      sawId = true;
+    }
+
+    if (!status) {
+      if (nameFromLine) {
+        appliedCandidates.add(nameFromLine);
+      }
+      continue;
+    }
+
+    sawStatus = true;
+
+    if (!nameFromLine) {
+      continue;
+    }
+
+    if (status === 'applied') {
+      applied.add(nameFromLine);
+    } else {
+      pending.add(nameFromLine);
+    }
+  }
+
+  if (!sawStatus && sawId && appliedCandidates.size > 0) {
+    const appliedList = Array.from(appliedCandidates);
+    const pendingList = localMigrations.filter(
+      (migration) => !appliedCandidates.has(migration),
+    );
+
+    return {
+      applied: appliedList,
+      pending: pendingList,
+    };
+  }
+
+  if (applied.size === 0 && pending.size === 0) {
+    return null;
+  }
+
+  return {
+    applied: Array.from(applied),
+    pending: Array.from(pending),
+  };
+}
+
+function extractMigrationName(
+  line: string,
+  candidates: string[],
+  migrationsById: Map<string, string>,
+) {
+  const directMatch = line.match(/\b\d{14}_[a-z0-9_]+\b/i);
+  if (directMatch?.[0]) {
+    return directMatch[0];
+  }
+
+  const columns = line
+    .split('|')
+    .map((value) => value.trim())
+    .filter((value) => value.length > 0);
+
+  if (columns.length >= 2) {
+    const id = columns.find((value) => /^\d{14}$/.test(value));
+    if (id) {
+      const byId = migrationsById.get(id);
+      if (byId) {
+        return byId;
+      }
+
+      const nameColumn = columns[1];
+      const normalizedName = normalizeMigrationName(nameColumn);
+      const candidate = `${id}_${normalizedName}`;
+      const exactMatch = candidates.find(
+        (migration) =>
+          migration.toLowerCase() === candidate.toLowerCase() ||
+          normalizeMigrationName(migration) === normalizedName,
+      );
+
+      return exactMatch ?? candidate;
+    }
+  }
+
+  return candidates.find((name) => line.includes(name)) ?? null;
+}
+
+function extractSupabaseStatus(line: string) {
+  const lower = line.toLowerCase();
+
+  if (/\b(not applied|pending|missing)\b/.test(lower)) {
+    return 'pending';
+  }
+
+  if (/\b(applied|completed)\b/.test(lower)) {
+    return 'applied';
+  }
+
+  return null;
+}
+
+function buildMigrationIdMap(migrations: string[]) {
+  const map = new Map<string, string>();
+
+  for (const migration of migrations) {
+    const match = migration.match(/^(\d{14})_(.+)$/);
+    if (match?.[1]) {
+      map.set(match[1], migration);
+    }
+  }
+
+  return map;
+}
+
+function normalizeMigrationName(value: string) {
+  return value
+    .trim()
+    .toLowerCase()
+    .replace(/\s+/g, '-')
+    .replace(/[^a-z0-9_-]/g, '');
+}

packages/mcp-server/src/tools/db/schema.ts

@@ -0,0 +1,53 @@
+import { z } from 'zod/v3';
+
+const DbToolSchema = z.enum(['supabase', 'drizzle-kit', 'prisma']);
+
+const MigrationStatusSchema = z.object({
+  applied: z.number(),
+  pending: z.number(),
+  pending_names: z.array(z.string()),
+});
+
+export const KitDbStatusInputSchema = z.object({});
+
+export const KitDbStatusOutputSchema = z.object({
+  connected: z.boolean(),
+  tool: DbToolSchema,
+  migrations: MigrationStatusSchema,
+});
+
+export const KitDbMigrateInputSchema = z.object({
+  target: z.string().default('latest'),
+});
+
+export const KitDbMigrateOutputSchema = z.object({
+  applied: z.array(z.string()),
+  total_applied: z.number(),
+  status: z.literal('success'),
+});
+
+export const KitDbSeedInputSchema = z.object({});
+
+export const KitDbSeedOutputSchema = z.object({
+  status: z.literal('success'),
+  message: z.string(),
+});
+
+export const KitDbResetInputSchema = z.object({
+  confirm: z.boolean().default(false),
+});
+
+export const KitDbResetOutputSchema = z.object({
+  status: z.literal('success'),
+  message: z.string(),
+});
+
+export type DbTool = z.infer<typeof DbToolSchema>;
+export type KitDbStatusInput = z.infer<typeof KitDbStatusInputSchema>;
+export type KitDbStatusOutput = z.infer<typeof KitDbStatusOutputSchema>;
+export type KitDbMigrateInput = z.infer<typeof KitDbMigrateInputSchema>;
+export type KitDbMigrateOutput = z.infer<typeof KitDbMigrateOutputSchema>;
+export type KitDbSeedInput = z.infer<typeof KitDbSeedInputSchema>;
+export type KitDbSeedOutput = z.infer<typeof KitDbSeedOutputSchema>;
+export type KitDbResetInput = z.infer<typeof KitDbResetInputSchema>;
+export type KitDbResetOutput = z.infer<typeof KitDbResetOutputSchema>;

packages/mcp-server/src/tools/deps-upgrade-advisor/__tests__/deps-upgrade-advisor.service.test.ts

@@ -0,0 +1,99 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  type DepsUpgradeAdvisorDeps,
+  createDepsUpgradeAdvisorService,
+} from '../deps-upgrade-advisor.service';
+
+function createDeps(
+  output: unknown,
+  overrides: Partial<DepsUpgradeAdvisorDeps> = {},
+): DepsUpgradeAdvisorDeps {
+  return {
+    async executeCommand() {
+      return {
+        stdout: JSON.stringify(output),
+        stderr: '',
+        exitCode: 0,
+      };
+    },
+    nowIso() {
+      return '2026-02-09T00:00:00.000Z';
+    },
+    ...overrides,
+  };
+}
+
+describe('DepsUpgradeAdvisorService', () => {
+  it('flags major updates as potentially breaking', async () => {
+    const service = createDepsUpgradeAdvisorService(
+      createDeps([
+        {
+          name: 'zod',
+          current: '3.25.0',
+          wanted: '3.26.0',
+          latest: '4.0.0',
+          workspace: 'root',
+          dependencyType: 'dependencies',
+        },
+      ]),
+    );
+
+    const result = await service.advise({});
+    const zod = result.recommendations.find((item) => item.package === 'zod');
+
+    expect(zod?.update_type).toBe('major');
+    expect(zod?.potentially_breaking).toBe(true);
+    expect(zod?.risk).toBe('high');
+  });
+
+  it('prefers wanted for major updates when includeMajor is false', async () => {
+    const service = createDepsUpgradeAdvisorService(
+      createDeps([
+        {
+          name: 'example-lib',
+          current: '1.2.0',
+          wanted: '1.9.0',
+          latest: '2.1.0',
+          workspace: 'root',
+          dependencyType: 'dependencies',
+        },
+      ]),
+    );
+
+    const result = await service.advise({});
+    const item = result.recommendations[0];
+
+    expect(item?.recommended_target).toBe('1.9.0');
+  });
+
+  it('filters out dev dependencies when requested', async () => {
+    const service = createDepsUpgradeAdvisorService(
+      createDeps([
+        {
+          name: 'vitest',
+          current: '2.1.0',
+          wanted: '2.1.8',
+          latest: '2.1.8',
+          workspace: 'root',
+          dependencyType: 'devDependencies',
+        },
+        {
+          name: 'zod',
+          current: '3.25.0',
+          wanted: '3.25.1',
+          latest: '3.25.1',
+          workspace: 'root',
+          dependencyType: 'dependencies',
+        },
+      ]),
+    );
+
+    const result = await service.advise({
+      state: { includeDevDependencies: false },
+    });
+
+    expect(result.recommendations).toHaveLength(1);
+    expect(result.recommendations[0]?.package).toBe('zod');
+  });
+});

packages/mcp-server/src/tools/deps-upgrade-advisor/__tests__/deps-upgrade-advisor.tool.test.ts

@@ -0,0 +1,50 @@
+import { describe, expect, it } from 'vitest';
+
+import { registerDepsUpgradeAdvisorToolWithDeps } from '../index';
+import { DepsUpgradeAdvisorOutputSchema } from '../schema';
+
+interface RegisteredTool {
+  name: string;
+  handler: (input: unknown) => Promise<Record<string, unknown>>;
+}
+
+describe('registerDepsUpgradeAdvisorTool', () => {
+  it('registers deps_upgrade_advisor and returns typed structured output', async () => {
+    const tools: RegisteredTool[] = [];
+
+    const server = {
+      registerTool(
+        name: string,
+        _config: Record<string, unknown>,
+        handler: (input: unknown) => Promise<Record<string, unknown>>,
+      ) {
+        tools.push({ name, handler });
+        return {};
+      },
+    };
+
+    registerDepsUpgradeAdvisorToolWithDeps(server as never, {
+      async executeCommand() {
+        return {
+          stdout: '[]',
+          stderr: '',
+          exitCode: 0,
+        };
+      },
+      nowIso() {
+        return '2026-02-09T00:00:00.000Z';
+      },
+    });
+
+    expect(tools).toHaveLength(1);
+    expect(tools[0]?.name).toBe('deps_upgrade_advisor');
+
+    const result = await tools[0]!.handler({});
+    const parsed = DepsUpgradeAdvisorOutputSchema.parse(
+      result.structuredContent,
+    );
+
+    expect(parsed.generated_at).toBeTruthy();
+    expect(Array.isArray(parsed.recommendations)).toBe(true);
+  });
+});

packages/mcp-server/src/tools/deps-upgrade-advisor/deps-upgrade-advisor.service.ts

@@ -0,0 +1,307 @@
+import type {
+  DepsUpgradeAdvisorInput,
+  DepsUpgradeAdvisorOutput,
+  DepsUpgradeRecommendation,
+} from './schema';
+
+interface CommandResult {
+  stdout: string;
+  stderr: string;
+  exitCode: number;
+}
+
+interface OutdatedDependency {
+  package: string;
+  workspace: string;
+  dependencyType: string;
+  current: string;
+  wanted: string;
+  latest: string;
+}
+
+export interface DepsUpgradeAdvisorDeps {
+  executeCommand(command: string, args: string[]): Promise<CommandResult>;
+  nowIso(): string;
+}
+
+export function createDepsUpgradeAdvisorService(deps: DepsUpgradeAdvisorDeps) {
+  return new DepsUpgradeAdvisorService(deps);
+}
+
+export class DepsUpgradeAdvisorService {
+  constructor(private readonly deps: DepsUpgradeAdvisorDeps) {}
+
+  async advise(
+    input: DepsUpgradeAdvisorInput,
+  ): Promise<DepsUpgradeAdvisorOutput> {
+    const includeMajor = input.state?.includeMajor ?? false;
+    const maxPackages = input.state?.maxPackages ?? 50;
+    const includeDevDependencies = input.state?.includeDevDependencies ?? true;
+    const warnings: string[] = [];
+
+    const outdated = await this.getOutdatedDependencies(warnings);
+
+    const filtered = outdated.filter((item) => {
+      if (includeDevDependencies) {
+        return true;
+      }
+
+      return !item.dependencyType.toLowerCase().includes('dev');
+    });
+
+    const recommendations = filtered
+      .map((item) => toRecommendation(item, includeMajor))
+      .sort(sortRecommendations)
+      .slice(0, maxPackages);
+
+    const major = recommendations.filter(
+      (item) => item.update_type === 'major',
+    );
+    const safe = recommendations.filter((item) => item.update_type !== 'major');
+
+    if (!includeMajor && major.length > 0) {
+      warnings.push(
+        `${major.length} major upgrades were excluded from immediate recommendations. Re-run with includeMajor=true to include them.`,
+      );
+    }
+
+    return {
+      generated_at: this.deps.nowIso(),
+      summary: {
+        total_outdated: filtered.length,
+        recommended_now: recommendations.filter((item) =>
+          includeMajor ? true : item.update_type !== 'major',
+        ).length,
+        major_available: filtered
+          .map((item) => toRecommendation(item, true))
+          .filter((item) => item.update_type === 'major').length,
+        minor_or_patch_available: filtered
+          .map((item) => toRecommendation(item, true))
+          .filter(
+            (item) =>
+              item.update_type === 'minor' || item.update_type === 'patch',
+          ).length,
+      },
+      recommendations,
+      grouped_commands: {
+        safe_batch_command: buildBatchCommand(
+          safe.map((item) => `${item.package}@${item.recommended_target}`),
+        ),
+        major_batch_command: includeMajor
+          ? buildBatchCommand(
+              major.map((item) => `${item.package}@${item.recommended_target}`),
+            )
+          : null,
+      },
+      warnings,
+    };
+  }
+
+  private async getOutdatedDependencies(warnings: string[]) {
+    const attempts: string[][] = [
+      ['outdated', '--recursive', '--format', 'json'],
+      ['outdated', '--recursive', '--json'],
+    ];
+
+    let lastError: Error | null = null;
+
+    for (const args of attempts) {
+      const result = await this.deps.executeCommand('pnpm', args);
+
+      if (!result.stdout.trim()) {
+        if (result.exitCode === 0) {
+          return [] as OutdatedDependency[];
+        }
+
+        warnings.push(
+          `pnpm ${args.join(' ')} returned no JSON output (exit code ${result.exitCode}).`,
+        );
+        lastError = new Error(result.stderr || 'Missing command output');
+        continue;
+      }
+
+      try {
+        return normalizeOutdatedJson(JSON.parse(result.stdout));
+      } catch (error) {
+        lastError = error instanceof Error ? error : new Error('Invalid JSON');
+      }
+    }
+
+    throw lastError ?? new Error('Unable to retrieve outdated dependencies');
+  }
+}
+
+function toRecommendation(
+  dependency: OutdatedDependency,
+  includeMajor: boolean,
+): DepsUpgradeRecommendation {
+  const updateType = getUpdateType(dependency.current, dependency.latest);
+  const risk =
+    updateType === 'major' ? 'high' : updateType === 'minor' ? 'medium' : 'low';
+  const target =
+    updateType === 'major' && !includeMajor
+      ? dependency.wanted
+      : dependency.latest;
+
+  return {
+    package: dependency.package,
+    workspace: dependency.workspace,
+    dependency_type: dependency.dependencyType,
+    current: dependency.current,
+    wanted: dependency.wanted,
+    latest: dependency.latest,
+    update_type: updateType,
+    risk,
+    potentially_breaking: updateType === 'major',
+    recommended_target: target,
+    recommended_command: `pnpm up -r ${dependency.package}@${target}`,
+    reason:
+      updateType === 'major' && !includeMajor
+        ? 'Major version available and potentially breaking; recommended target is the highest non-major range match.'
+        : `Recommended ${updateType} update based on current vs latest version.`,
+  };
+}
+
+function normalizeOutdatedJson(value: unknown): OutdatedDependency[] {
+  if (Array.isArray(value)) {
+    return value.map(normalizeOutdatedItem).filter((item) => item !== null);
+  }
+
+  if (isRecord(value)) {
+    const rows: OutdatedDependency[] = [];
+
+    for (const [workspace, data] of Object.entries(value)) {
+      if (!isRecord(data)) {
+        continue;
+      }
+
+      for (const [name, info] of Object.entries(data)) {
+        if (!isRecord(info)) {
+          continue;
+        }
+
+        const current = readString(info, 'current');
+        const wanted = readString(info, 'wanted');
+        const latest = readString(info, 'latest');
+
+        if (!current || !wanted || !latest) {
+          continue;
+        }
+
+        rows.push({
+          package: name,
+          workspace,
+          dependencyType: readString(info, 'dependencyType') ?? 'unknown',
+          current,
+          wanted,
+          latest,
+        });
+      }
+    }
+
+    return rows;
+  }
+
+  return [];
+}
+
+function normalizeOutdatedItem(value: unknown): OutdatedDependency | null {
+  if (!isRecord(value)) {
+    return null;
+  }
+
+  const name =
+    readString(value, 'name') ??
+    readString(value, 'package') ??
+    readString(value, 'pkgName');
+  const current = readString(value, 'current');
+  const wanted = readString(value, 'wanted');
+  const latest = readString(value, 'latest');
+
+  if (!name || !current || !wanted || !latest) {
+    return null;
+  }
+
+  return {
+    package: name,
+    workspace:
+      readString(value, 'workspace') ??
+      readString(value, 'dependent') ??
+      readString(value, 'location') ??
+      'root',
+    dependencyType:
+      readString(value, 'dependencyType') ??
+      readString(value, 'packageType') ??
+      'unknown',
+    current,
+    wanted,
+    latest,
+  };
+}
+
+function getUpdateType(current: string, latest: string) {
+  const currentVersion = parseSemver(current);
+  const latestVersion = parseSemver(latest);
+
+  if (!currentVersion || !latestVersion) {
+    return 'unknown' as const;
+  }
+
+  if (latestVersion.major > currentVersion.major) {
+    return 'major' as const;
+  }
+
+  if (latestVersion.minor > currentVersion.minor) {
+    return 'minor' as const;
+  }
+
+  if (latestVersion.patch > currentVersion.patch) {
+    return 'patch' as const;
+  }
+
+  return 'unknown' as const;
+}
+
+function parseSemver(input: string) {
+  const match = input.match(/(\d+)\.(\d+)\.(\d+)/);
+
+  if (!match) {
+    return null;
+  }
+
+  return {
+    major: Number(match[1]),
+    minor: Number(match[2]),
+    patch: Number(match[3]),
+  };
+}
+
+function buildBatchCommand(upgrades: string[]) {
+  if (upgrades.length === 0) {
+    return null;
+  }
+
+  return `pnpm up -r ${upgrades.join(' ')}`;
+}
+
+function sortRecommendations(
+  a: DepsUpgradeRecommendation,
+  b: DepsUpgradeRecommendation,
+) {
+  const rank: Record<DepsUpgradeRecommendation['risk'], number> = {
+    high: 0,
+    medium: 1,
+    low: 2,
+  };
+
+  return rank[a.risk] - rank[b.risk] || a.package.localeCompare(b.package);
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === 'object' && value !== null;
+}
+
+function readString(record: Record<string, unknown>, key: string) {
+  const value = record[key];
+  return typeof value === 'string' && value.length > 0 ? value : null;
+}

packages/mcp-server/src/tools/deps-upgrade-advisor/index.ts

@@ -0,0 +1,122 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { execFile } from 'node:child_process';
+import { promisify } from 'node:util';
+
+import {
+  type DepsUpgradeAdvisorDeps,
+  createDepsUpgradeAdvisorService,
+} from './deps-upgrade-advisor.service';
+import {
+  DepsUpgradeAdvisorInputSchema,
+  DepsUpgradeAdvisorOutputSchema,
+} from './schema';
+
+const execFileAsync = promisify(execFile);
+
+export function registerDepsUpgradeAdvisorTool(server: McpServer) {
+  return registerDepsUpgradeAdvisorToolWithDeps(
+    server,
+    createDepsUpgradeAdvisorDeps(),
+  );
+}
+
+export function registerDepsUpgradeAdvisorToolWithDeps(
+  server: McpServer,
+  deps: DepsUpgradeAdvisorDeps,
+) {
+  const service = createDepsUpgradeAdvisorService(deps);
+
+  return server.registerTool(
+    'deps_upgrade_advisor',
+    {
+      description:
+        'Analyze outdated dependencies and return risk-bucketed upgrade recommendations',
+      inputSchema: DepsUpgradeAdvisorInputSchema,
+      outputSchema: DepsUpgradeAdvisorOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = DepsUpgradeAdvisorInputSchema.parse(input);
+        const result = await service.advise(parsed);
+
+        return {
+          structuredContent: result,
+          content: [
+            {
+              type: 'text',
+              text: JSON.stringify(result),
+            },
+          ],
+        };
+      } catch (error) {
+        return {
+          isError: true,
+          content: [
+            {
+              type: 'text',
+              text: `deps_upgrade_advisor failed: ${toErrorMessage(error)}`,
+            },
+          ],
+        };
+      }
+    },
+  );
+}
+
+function createDepsUpgradeAdvisorDeps(): DepsUpgradeAdvisorDeps {
+  const rootPath = process.cwd();
+
+  return {
+    async executeCommand(command, args) {
+      try {
+        const result = await execFileAsync(command, args, {
+          cwd: rootPath,
+          maxBuffer: 1024 * 1024 * 10,
+        });
+
+        return {
+          stdout: result.stdout,
+          stderr: result.stderr,
+          exitCode: 0,
+        };
+      } catch (error) {
+        if (isExecError(error)) {
+          return {
+            stdout: error.stdout ?? '',
+            stderr: error.stderr ?? '',
+            exitCode: error.code,
+          };
+        }
+
+        throw error;
+      }
+    },
+    nowIso() {
+      return new Date().toISOString();
+    },
+  };
+}
+
+interface ExecError extends Error {
+  code: number;
+  stdout?: string;
+  stderr?: string;
+}
+
+function isExecError(error: unknown): error is ExecError {
+  return error instanceof Error && 'code' in error;
+}
+
+function toErrorMessage(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+
+  return 'Unknown error';
+}
+
+export {
+  createDepsUpgradeAdvisorService,
+  type DepsUpgradeAdvisorDeps,
+} from './deps-upgrade-advisor.service';
+export type { DepsUpgradeAdvisorOutput } from './schema';

packages/mcp-server/src/tools/deps-upgrade-advisor/schema.ts

@@ -0,0 +1,52 @@
+import { z } from 'zod/v3';
+
+export const DepsUpgradeAdvisorInputSchema = z.object({
+  state: z
+    .object({
+      includeMajor: z.boolean().optional(),
+      maxPackages: z.number().int().min(1).max(200).optional(),
+      includeDevDependencies: z.boolean().optional(),
+    })
+    .optional(),
+});
+
+export const DepsUpgradeRecommendationSchema = z.object({
+  package: z.string(),
+  workspace: z.string(),
+  dependency_type: z.string(),
+  current: z.string(),
+  wanted: z.string(),
+  latest: z.string(),
+  update_type: z.enum(['major', 'minor', 'patch', 'unknown']),
+  risk: z.enum(['high', 'medium', 'low']),
+  potentially_breaking: z.boolean(),
+  recommended_target: z.string(),
+  recommended_command: z.string(),
+  reason: z.string(),
+});
+
+export const DepsUpgradeAdvisorOutputSchema = z.object({
+  generated_at: z.string(),
+  summary: z.object({
+    total_outdated: z.number().int().min(0),
+    recommended_now: z.number().int().min(0),
+    major_available: z.number().int().min(0),
+    minor_or_patch_available: z.number().int().min(0),
+  }),
+  recommendations: z.array(DepsUpgradeRecommendationSchema),
+  grouped_commands: z.object({
+    safe_batch_command: z.string().nullable(),
+    major_batch_command: z.string().nullable(),
+  }),
+  warnings: z.array(z.string()),
+});
+
+export type DepsUpgradeAdvisorInput = z.infer<
+  typeof DepsUpgradeAdvisorInputSchema
+>;
+export type DepsUpgradeRecommendation = z.infer<
+  typeof DepsUpgradeRecommendationSchema
+>;
+export type DepsUpgradeAdvisorOutput = z.infer<
+  typeof DepsUpgradeAdvisorOutputSchema
+>;

packages/mcp-server/src/tools/dev/index.ts

@@ -0,0 +1,494 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { execFile, spawn } from 'node:child_process';
+import { access, readFile } from 'node:fs/promises';
+import { Socket } from 'node:net';
+import { join } from 'node:path';
+import { promisify } from 'node:util';
+
+import {
+  DEFAULT_PORT_CONFIG,
+  type KitDevServiceDeps,
+  createKitDevService,
+} from './kit-dev.service';
+import {
+  KitDevStartInputSchema,
+  KitDevStartOutputSchema,
+  KitDevStatusInputSchema,
+  KitDevStatusOutputSchema,
+  KitDevStopInputSchema,
+  KitDevStopOutputSchema,
+  KitMailboxStatusInputSchema,
+  KitMailboxStatusOutputSchema,
+} from './schema';
+
+const execFileAsync = promisify(execFile);
+
+export function registerKitDevTools(server: McpServer) {
+  const service = createKitDevService(createKitDevDeps());
+
+  server.registerTool(
+    'kit_dev_start',
+    {
+      description: 'Start all or selected local development services',
+      inputSchema: KitDevStartInputSchema,
+      outputSchema: KitDevStartOutputSchema,
+    },
+    async (input) => {
+      const parsedInput = KitDevStartInputSchema.parse(input);
+
+      try {
+        const result = await service.start(parsedInput);
+
+        return {
+          structuredContent: result,
+          content: [{ type: 'text', text: JSON.stringify(result) }],
+        };
+      } catch (error) {
+        return {
+          isError: true,
+          content: [
+            {
+              type: 'text',
+              text: `kit_dev_start failed: ${toErrorMessage(error)}`,
+            },
+          ],
+        };
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_dev_stop',
+    {
+      description: 'Stop all or selected local development services',
+      inputSchema: KitDevStopInputSchema,
+      outputSchema: KitDevStopOutputSchema,
+    },
+    async (input) => {
+      const parsedInput = KitDevStopInputSchema.parse(input);
+
+      try {
+        const result = await service.stop(parsedInput);
+
+        return {
+          structuredContent: result,
+          content: [{ type: 'text', text: JSON.stringify(result) }],
+        };
+      } catch (error) {
+        return {
+          isError: true,
+          content: [
+            {
+              type: 'text',
+              text: `kit_dev_stop failed: ${toErrorMessage(error)}`,
+            },
+          ],
+        };
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_dev_status',
+    {
+      description:
+        'Check status for app, database, mailbox, and stripe local services',
+      inputSchema: KitDevStatusInputSchema,
+      outputSchema: KitDevStatusOutputSchema,
+    },
+    async (input) => {
+      KitDevStatusInputSchema.parse(input);
+
+      try {
+        const result = await service.status();
+
+        return {
+          structuredContent: result,
+          content: [{ type: 'text', text: JSON.stringify(result) }],
+        };
+      } catch (error) {
+        return {
+          isError: true,
+          content: [
+            {
+              type: 'text',
+              text: `kit_dev_status failed: ${toErrorMessage(error)}`,
+            },
+          ],
+        };
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_mailbox_status',
+    {
+      description:
+        'Check local mailbox health with graceful fallback fields for UI state',
+      inputSchema: KitMailboxStatusInputSchema,
+      outputSchema: KitMailboxStatusOutputSchema,
+    },
+    async (input) => {
+      KitMailboxStatusInputSchema.parse(input);
+
+      try {
+        const result = await service.mailboxStatus();
+
+        return {
+          structuredContent: result,
+          content: [{ type: 'text', text: JSON.stringify(result) }],
+        };
+      } catch (error) {
+        return {
+          isError: true,
+          content: [
+            {
+              type: 'text',
+              text: `kit_mailbox_status failed: ${toErrorMessage(error)}`,
+            },
+          ],
+        };
+      }
+    },
+  );
+}
+
+export function createKitDevDeps(rootPath = process.cwd()): KitDevServiceDeps {
+  return {
+    rootPath,
+    async resolveVariantContext() {
+      const packageJson = await readJsonIfPresent(
+        join(rootPath, 'apps', 'web', 'package.json'),
+      );
+      const hasSupabase = await pathExists(
+        join(rootPath, 'apps', 'web', 'supabase'),
+      );
+
+      const dependencies = {
+        ...(packageJson?.dependencies ?? {}),
+        ...(packageJson?.devDependencies ?? {}),
+      } as Record<string, unknown>;
+
+      const framework =
+        'react-router' in dependencies || '@react-router/dev' in dependencies
+          ? 'react-router'
+          : 'nextjs';
+
+      if (hasSupabase) {
+        return {
+          variant:
+            framework === 'react-router'
+              ? 'react-router-supabase'
+              : 'next-supabase',
+          variantFamily: 'supabase',
+          framework,
+        } as const;
+      }
+
+      return {
+        variant:
+          framework === 'react-router'
+            ? 'react-router-drizzle'
+            : 'next-drizzle',
+        variantFamily: 'orm',
+        framework,
+      } as const;
+    },
+    async resolvePortConfig() {
+      const configTomlPath = join(
+        rootPath,
+        'apps',
+        'web',
+        'supabase',
+        'config.toml',
+      );
+
+      let supabaseApiPort = DEFAULT_PORT_CONFIG.supabaseApiPort;
+      let supabaseStudioPort = DEFAULT_PORT_CONFIG.supabaseStudioPort;
+
+      try {
+        const toml = await readFile(configTomlPath, 'utf8');
+        supabaseApiPort = parseTomlSectionPort(toml, 'api') ?? supabaseApiPort;
+        supabaseStudioPort =
+          parseTomlSectionPort(toml, 'studio') ?? supabaseStudioPort;
+      } catch {
+        // config.toml not present or unreadable — use defaults.
+      }
+
+      return {
+        appPort: DEFAULT_PORT_CONFIG.appPort,
+        supabaseApiPort,
+        supabaseStudioPort,
+        mailboxApiPort: DEFAULT_PORT_CONFIG.mailboxApiPort,
+        mailboxPort: DEFAULT_PORT_CONFIG.mailboxPort,
+        ormDbPort: DEFAULT_PORT_CONFIG.ormDbPort,
+        stripeWebhookPath: DEFAULT_PORT_CONFIG.stripeWebhookPath,
+      };
+    },
+    async executeCommand(command: string, args: string[]) {
+      const result = await executeWithFallback(rootPath, command, args);
+
+      return {
+        stdout: result.stdout,
+        stderr: result.stderr,
+        exitCode: 0,
+      };
+    },
+    async spawnDetached(command: string, args: string[]) {
+      const child = spawn(command, args, {
+        cwd: rootPath,
+        detached: true,
+        stdio: 'ignore',
+      });
+
+      child.unref();
+
+      if (!child.pid) {
+        throw new Error(`Failed to spawn ${command}`);
+      }
+
+      return {
+        pid: child.pid,
+      };
+    },
+    async isPortOpen(port: number) {
+      return checkPort(port);
+    },
+    async fetchJson(url: string) {
+      const response = await fetch(url);
+
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status} for ${url}`);
+      }
+
+      return response.json();
+    },
+    async getPortProcess(port: number) {
+      try {
+        const result = await execFileAsync(
+          'lsof',
+          ['-nP', `-iTCP:${port}`, '-sTCP:LISTEN', '-Fpc'],
+          {
+            cwd: rootPath,
+          },
+        );
+
+        const pidLine = result.stdout
+          .split('\n')
+          .map((line) => line.trim())
+          .find((line) => line.startsWith('p'));
+
+        const commandLine = result.stdout
+          .split('\n')
+          .map((line) => line.trim())
+          .find((line) => line.startsWith('c'));
+
+        if (!pidLine || !commandLine) {
+          return null;
+        }
+
+        const pid = Number(pidLine.slice(1));
+
+        if (!Number.isFinite(pid)) {
+          return null;
+        }
+
+        return {
+          pid,
+          command: commandLine.slice(1),
+        };
+      } catch {
+        return null;
+      }
+    },
+    async isProcessRunning(pid: number) {
+      try {
+        process.kill(pid, 0);
+        return true;
+      } catch {
+        return false;
+      }
+    },
+    async findProcessesByName(pattern: string) {
+      try {
+        const result = await execFileAsync('pgrep', ['-fl', pattern], {
+          cwd: rootPath,
+        });
+
+        return result.stdout
+          .split('\n')
+          .filter(Boolean)
+          .map((line) => {
+            const spaceIdx = line.indexOf(' ');
+
+            if (spaceIdx <= 0) {
+              return null;
+            }
+
+            const pid = Number(line.slice(0, spaceIdx));
+            const command = line.slice(spaceIdx + 1).trim();
+
+            if (!Number.isFinite(pid)) {
+              return null;
+            }
+
+            return { pid, command };
+          })
+          .filter((p): p is { pid: number; command: string } => p !== null);
+      } catch {
+        return [];
+      }
+    },
+    async killProcess(pid: number, signal = 'SIGTERM') {
+      try {
+        // Kill the entire process group (negative PID) since services
+        // are spawned detached and become process group leaders.
+        process.kill(-pid, signal);
+      } catch {
+        // Fall back to killing the individual process if group kill fails.
+        process.kill(pid, signal);
+      }
+    },
+    async sleep(ms: number) {
+      await new Promise((resolve) => setTimeout(resolve, ms));
+    },
+  };
+}
+
+async function executeWithFallback(
+  rootPath: string,
+  command: string,
+  args: string[],
+) {
+  try {
+    return await execFileAsync(command, args, {
+      cwd: rootPath,
+    });
+  } catch (error) {
+    if (isLocalCliCandidate(command)) {
+      const localBinCandidates = [
+        join(rootPath, 'node_modules', '.bin', command),
+        join(rootPath, 'apps', 'web', 'node_modules', '.bin', command),
+      ];
+
+      for (const localBin of localBinCandidates) {
+        try {
+          return await execFileAsync(localBin, args, {
+            cwd: rootPath,
+          });
+        } catch {
+          // Try next local binary candidate.
+        }
+      }
+
+      try {
+        return await execFileAsync('pnpm', ['exec', command, ...args], {
+          cwd: rootPath,
+        });
+      } catch {
+        return execFileAsync(
+          'pnpm',
+          ['--filter', 'web', 'exec', command, ...args],
+          {
+            cwd: rootPath,
+          },
+        );
+      }
+    }
+
+    throw error;
+  }
+}
+
+function isLocalCliCandidate(command: string) {
+  return command === 'supabase' || command === 'stripe';
+}
+
+async function pathExists(path: string) {
+  try {
+    await access(path);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function readJsonIfPresent(path: string) {
+  try {
+    const content = await readFile(path, 'utf8');
+    return JSON.parse(content) as {
+      dependencies?: Record<string, unknown>;
+      devDependencies?: Record<string, unknown>;
+    };
+  } catch {
+    return null;
+  }
+}
+
+async function checkPort(port: number) {
+  return new Promise<boolean>((resolve) => {
+    const socket = new Socket();
+
+    socket.setTimeout(200);
+
+    socket.once('connect', () => {
+      socket.destroy();
+      resolve(true);
+    });
+
+    socket.once('timeout', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.once('error', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.connect(port, '127.0.0.1');
+  });
+}
+
+function parseTomlSectionPort(
+  content: string,
+  section: string,
+): number | undefined {
+  const lines = content.split('\n');
+  let inSection = false;
+
+  for (const line of lines) {
+    const trimmed = line.trim();
+
+    if (trimmed.startsWith('[')) {
+      inSection = trimmed === `[${section}]`;
+      continue;
+    }
+
+    if (inSection) {
+      const match = trimmed.match(/^port\s*=\s*(\d+)/);
+
+      if (match) {
+        return Number(match[1]);
+      }
+    }
+  }
+
+  return undefined;
+}
+
+function toErrorMessage(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+
+  return 'Unknown error';
+}
+
+export { createKitDevService, DEFAULT_PORT_CONFIG } from './kit-dev.service';
+export type { KitDevServiceDeps, PortConfig } from './kit-dev.service';
+export type {
+  KitDevStartOutput,
+  KitDevStatusOutput,
+  KitDevStopOutput,
+} from './schema';

packages/mcp-server/src/tools/dev/kit-dev.service.ts

@@ -0,0 +1,723 @@
+import type {
+  DevServiceId,
+  DevServiceSelection,
+  DevServiceStatusItem,
+  KitDevStartInput,
+  KitDevStartOutput,
+  KitDevStatusOutput,
+  KitDevStopInput,
+  KitDevStopOutput,
+  KitMailboxStatusOutput,
+} from './schema';
+
+type VariantFamily = 'supabase' | 'orm';
+type Framework = 'nextjs' | 'react-router';
+
+type SignalName = 'SIGTERM' | 'SIGKILL';
+
+interface CommandResult {
+  stdout: string;
+  stderr: string;
+  exitCode: number;
+}
+
+interface ProcessInfo {
+  pid: number;
+  command: string;
+}
+
+interface SpawnedProcess {
+  pid: number;
+}
+
+interface VariantContext {
+  variant: string;
+  variantFamily: VariantFamily;
+  framework: Framework;
+}
+
+export interface PortConfig {
+  appPort: number;
+  supabaseApiPort: number;
+  supabaseStudioPort: number;
+  mailboxApiPort: number;
+  mailboxPort: number;
+  ormDbPort: number;
+  stripeWebhookPath: string;
+}
+
+export const DEFAULT_PORT_CONFIG: PortConfig = {
+  appPort: 3000,
+  supabaseApiPort: 54321,
+  supabaseStudioPort: 54323,
+  mailboxApiPort: 54324,
+  mailboxPort: 8025,
+  ormDbPort: 5432,
+  stripeWebhookPath: '/api/billing/webhook',
+};
+
+export interface KitDevServiceDeps {
+  rootPath: string;
+  resolveVariantContext(): Promise<VariantContext>;
+  resolvePortConfig(): Promise<PortConfig>;
+  executeCommand(command: string, args: string[]): Promise<CommandResult>;
+  spawnDetached(command: string, args: string[]): Promise<SpawnedProcess>;
+  isPortOpen(port: number): Promise<boolean>;
+  getPortProcess(port: number): Promise<ProcessInfo | null>;
+  isProcessRunning(pid: number): Promise<boolean>;
+  findProcessesByName(pattern: string): Promise<ProcessInfo[]>;
+  killProcess(pid: number, signal?: SignalName): Promise<void>;
+  sleep(ms: number): Promise<void>;
+  fetchJson(url: string): Promise<unknown>;
+}
+
+interface MailboxHealth {
+  connected: boolean;
+  running: boolean;
+  apiReachable: boolean;
+  url: string;
+  port: number;
+  reason?: string;
+  diagnostics?: Record<string, string>;
+}
+
+export function createKitDevService(deps: KitDevServiceDeps) {
+  return new KitDevService(deps);
+}
+
+export class KitDevService {
+  constructor(private readonly deps: KitDevServiceDeps) {}
+
+  async start(input: KitDevStartInput): Promise<KitDevStartOutput> {
+    const selectedServices = this.expandServices(input.services);
+    const variant = await this.deps.resolveVariantContext();
+    const ports = await this.deps.resolvePortConfig();
+
+    const startedPids: Partial<Record<DevServiceId, number>> = {};
+
+    if (selectedServices.includes('database')) {
+      const running = await this.isDatabaseRunning(variant, ports);
+
+      if (!running) {
+        await this.startDatabase(variant);
+      }
+    }
+
+    if (
+      selectedServices.includes('mailbox') &&
+      variant.variantFamily === 'supabase'
+    ) {
+      const mailbox = await this.collectMailboxHealth(variant, ports);
+
+      if (!mailbox.connected) {
+        await this.startDatabase(variant);
+      }
+    }
+
+    if (selectedServices.includes('app')) {
+      const running = await this.deps.isPortOpen(ports.appPort);
+
+      if (!running) {
+        startedPids.app = await this.startApp(variant, ports);
+      }
+    }
+
+    if (selectedServices.includes('stripe')) {
+      const procs = await this.deps.findProcessesByName('stripe.*listen');
+
+      if (procs.length === 0) {
+        startedPids.stripe = await this.startStripe(ports);
+      }
+    }
+
+    const status = await this.collectStatus(variant, ports, startedPids);
+
+    return {
+      services: status.filter((service) =>
+        selectedServices.includes(service.id),
+      ),
+    };
+  }
+
+  async stop(input: KitDevStopInput): Promise<KitDevStopOutput> {
+    const selectedServices = this.expandServices(input.services);
+    const variant = await this.deps.resolveVariantContext();
+    const ports = await this.deps.resolvePortConfig();
+
+    const stopped = new Set<DevServiceId>();
+
+    if (selectedServices.includes('stripe')) {
+      const procs = await this.deps.findProcessesByName('stripe.*listen');
+
+      for (const proc of procs) {
+        await this.stopProcess(proc.pid);
+      }
+
+      stopped.add('stripe');
+    }
+
+    if (selectedServices.includes('app')) {
+      const proc = await this.deps.getPortProcess(ports.appPort);
+
+      if (proc) {
+        await this.stopProcess(proc.pid);
+      }
+
+      stopped.add('app');
+    }
+
+    const shouldStopDatabase =
+      selectedServices.includes('database') ||
+      (selectedServices.includes('mailbox') &&
+        variant.variantFamily === 'supabase');
+
+    if (shouldStopDatabase) {
+      try {
+        await this.stopDatabase(variant);
+      } catch {
+        // Best-effort — the database process may already be stopped or
+        // the CLI may not be available.
+      }
+
+      if (selectedServices.includes('database')) {
+        stopped.add('database');
+      }
+      if (selectedServices.includes('mailbox')) {
+        stopped.add('mailbox');
+      }
+    } else if (selectedServices.includes('mailbox')) {
+      stopped.add('mailbox');
+    }
+
+    return {
+      stopped: Array.from(stopped),
+    };
+  }
+
+  async status(): Promise<KitDevStatusOutput> {
+    const variant = await this.deps.resolveVariantContext();
+    const ports = await this.deps.resolvePortConfig();
+
+    const services = await this.collectStatus(variant, ports);
+
+    return {
+      services,
+    };
+  }
+
+  async mailboxStatus(): Promise<KitMailboxStatusOutput> {
+    const variant = await this.deps.resolveVariantContext();
+    const ports = await this.deps.resolvePortConfig();
+    const mailbox = await this.collectMailboxHealth(variant, ports);
+
+    return {
+      connected: mailbox.connected,
+      running: mailbox.running,
+      api_reachable: mailbox.apiReachable,
+      url: mailbox.url,
+      port: mailbox.port,
+      reason: mailbox.reason,
+    };
+  }
+
+  private expandServices(services: DevServiceSelection[]): DevServiceId[] {
+    if (services.includes('all')) {
+      return ['app', 'database', 'mailbox', 'stripe'];
+    }
+
+    const normalized = services.map((service) =>
+      service === 'mailpit' ? 'mailbox' : service,
+    );
+
+    return Array.from(new Set(normalized)) as DevServiceId[];
+  }
+
+  private async isDatabaseRunning(
+    variant: VariantContext,
+    ports: PortConfig,
+  ): Promise<boolean> {
+    if (variant.variantFamily === 'supabase') {
+      const apiOpen = await this.deps.isPortOpen(ports.supabaseApiPort);
+      const studioOpen = await this.deps.isPortOpen(ports.supabaseStudioPort);
+
+      return apiOpen || studioOpen;
+    }
+
+    return this.deps.isPortOpen(ports.ormDbPort);
+  }
+
+  private async startDatabase(variant: VariantContext) {
+    if (variant.variantFamily === 'supabase') {
+      await this.deps.executeCommand('pnpm', [
+        '--filter',
+        'web',
+        'supabase:start',
+      ]);
+      await this.deps.sleep(400);
+
+      return;
+    }
+
+    await this.deps.executeCommand('docker', [
+      'compose',
+      'up',
+      '-d',
+      'postgres',
+    ]);
+  }
+
+  private async stopDatabase(variant: VariantContext) {
+    if (variant.variantFamily === 'supabase') {
+      await this.deps.executeCommand('pnpm', [
+        '--filter',
+        'web',
+        'supabase:stop',
+      ]);
+      return;
+    }
+
+    await this.deps.executeCommand('docker', ['compose', 'stop', 'postgres']);
+  }
+
+  private async startApp(
+    variant: VariantContext,
+    ports: PortConfig,
+  ): Promise<number> {
+    const args =
+      variant.framework === 'react-router'
+        ? ['exec', 'react-router', 'dev', '--port', String(ports.appPort)]
+        : [
+            '--filter',
+            'web',
+            'exec',
+            'next',
+            'dev',
+            '--port',
+            String(ports.appPort),
+          ];
+
+    const process = await this.deps.spawnDetached('pnpm', args);
+
+    await this.deps.sleep(500);
+
+    return process.pid;
+  }
+
+  private async startStripe(ports: PortConfig): Promise<number> {
+    const webhookUrl = `http://localhost:${ports.appPort}${ports.stripeWebhookPath}`;
+    const process = await this.deps.spawnDetached('pnpm', [
+      'exec',
+      'stripe',
+      'listen',
+      '--forward-to',
+      webhookUrl,
+    ]);
+
+    return process.pid;
+  }
+
+  private async collectStatus(
+    variant: VariantContext,
+    ports: PortConfig,
+    startedPids: Partial<Record<DevServiceId, number>> = {},
+  ): Promise<DevServiceStatusItem[]> {
+    const app = await this.collectAppStatus(variant, ports, startedPids);
+    const database = await this.collectDatabaseStatus(variant, ports);
+    const mailbox = await this.collectMailboxStatus(variant, ports);
+    const stripe = await this.collectStripeStatus(ports, startedPids);
+
+    return [app, database, mailbox, stripe];
+  }
+
+  private async collectAppStatus(
+    variant: VariantContext,
+    ports: PortConfig,
+    startedPids: Partial<Record<DevServiceId, number>> = {},
+  ): Promise<DevServiceStatusItem> {
+    const name =
+      variant.framework === 'react-router'
+        ? 'React Router Dev Server'
+        : 'Next.js Dev Server';
+
+    const portOpen = await this.deps.isPortOpen(ports.appPort);
+    const proc = portOpen
+      ? await this.deps.getPortProcess(ports.appPort)
+      : null;
+
+    // If we just started the app, the port may not be open yet.
+    // Fall back to checking if the spawned process is alive.
+    const justStartedPid = startedPids.app;
+    const justStartedAlive = justStartedPid
+      ? await this.deps.isProcessRunning(justStartedPid)
+      : false;
+
+    const running = portOpen || justStartedAlive;
+
+    return {
+      id: 'app',
+      name,
+      status: running ? 'running' : 'stopped',
+      port: ports.appPort,
+      url: running ? `http://localhost:${ports.appPort}` : undefined,
+      pid: proc?.pid ?? (justStartedAlive ? justStartedPid : null) ?? null,
+    };
+  }
+
+  private async collectDatabaseStatus(
+    variant: VariantContext,
+    ports: PortConfig,
+  ): Promise<DevServiceStatusItem> {
+    if (variant.variantFamily === 'supabase') {
+      const extras = await this.resolveSupabaseExtras();
+      const apiPort =
+        extractPortFromUrl(extras.api_url) ?? ports.supabaseApiPort;
+      const studioPort =
+        extractPortFromUrl(extras.studio_url) ?? ports.supabaseStudioPort;
+      const portOpen = await this.deps.isPortOpen(apiPort);
+      const studioOpen = await this.deps.isPortOpen(studioPort);
+      const running = portOpen || studioOpen;
+
+      return {
+        id: 'database',
+        name: 'Supabase',
+        status: running ? 'running' : 'stopped',
+        port: apiPort,
+        url:
+          extras.api_url ??
+          (running ? `http://127.0.0.1:${apiPort}` : undefined),
+        extras: running
+          ? {
+              ...(extras.studio_url ? { studio_url: extras.studio_url } : {}),
+              ...(extras.anon_key ? { anon_key: extras.anon_key } : {}),
+              ...(extras.service_role_key
+                ? { service_role_key: extras.service_role_key }
+                : {}),
+            }
+          : undefined,
+      };
+    }
+
+    const running = await this.deps.isPortOpen(ports.ormDbPort);
+
+    return {
+      id: 'database',
+      name: 'PostgreSQL',
+      status: running ? 'running' : 'stopped',
+      port: ports.ormDbPort,
+      url: running ? `postgresql://localhost:${ports.ormDbPort}` : undefined,
+    };
+  }
+
+  private async collectStripeStatus(
+    ports: PortConfig,
+    startedPids: Partial<Record<DevServiceId, number>> = {},
+  ): Promise<DevServiceStatusItem> {
+    const procs = await this.deps.findProcessesByName('stripe.*listen');
+    const justStartedPid = startedPids.stripe;
+    const justStartedAlive = justStartedPid
+      ? await this.deps.isProcessRunning(justStartedPid)
+      : false;
+
+    const running = procs.length > 0 || justStartedAlive;
+    const pid =
+      procs[0]?.pid ?? (justStartedAlive ? justStartedPid : undefined);
+
+    const webhookUrl = procs[0]?.command
+      ? (extractForwardToUrl(procs[0].command) ??
+        `http://localhost:${ports.appPort}${ports.stripeWebhookPath}`)
+      : `http://localhost:${ports.appPort}${ports.stripeWebhookPath}`;
+
+    return {
+      id: 'stripe',
+      name: 'Stripe CLI',
+      status: running ? 'running' : 'stopped',
+      pid: pid ?? null,
+      webhook_url: running ? webhookUrl : undefined,
+    };
+  }
+
+  private async collectMailboxStatus(
+    variant: VariantContext,
+    ports: PortConfig,
+  ): Promise<DevServiceStatusItem> {
+    const mailbox = await this.collectMailboxHealth(variant, ports);
+
+    return {
+      id: 'mailbox',
+      name: 'Mailbox',
+      status: mailbox.running
+        ? 'running'
+        : mailbox.connected && !mailbox.apiReachable
+          ? 'error'
+          : 'stopped',
+      port: mailbox.port,
+      url: mailbox.url,
+      extras: mailbox.diagnostics,
+    };
+  }
+
+  private async collectMailboxHealth(
+    variant: VariantContext,
+    ports: PortConfig,
+  ): Promise<MailboxHealth> {
+    const mailboxUrl = `http://localhost:${ports.mailboxPort}`;
+    const mailboxApiUrl = `http://127.0.0.1:${ports.mailboxApiPort}/api/v1/info`;
+
+    if (variant.variantFamily !== 'supabase') {
+      return {
+        connected: false,
+        running: false,
+        apiReachable: false,
+        url: mailboxUrl,
+        port: ports.mailboxPort,
+        reason: 'Mailbox is only available for Supabase variants',
+      };
+    }
+
+    const [apiReachable, containerStatus] = await Promise.all([
+      this.checkMailboxApi(mailboxApiUrl),
+      this.resolveMailboxContainerStatus(),
+    ]);
+
+    if (apiReachable.ok) {
+      return {
+        connected: true,
+        running: true,
+        apiReachable: true,
+        url: mailboxUrl,
+        port: ports.mailboxPort,
+      };
+    }
+
+    if (containerStatus.running) {
+      const reason =
+        'Mailbox container is running, but Mailpit API is unreachable';
+
+      return {
+        connected: true,
+        running: false,
+        apiReachable: false,
+        url: mailboxUrl,
+        port: ports.mailboxPort,
+        reason,
+        diagnostics: {
+          reason,
+          api_url: mailboxApiUrl,
+          ...(apiReachable.error ? { api_error: apiReachable.error } : {}),
+          ...(containerStatus.source
+            ? { container_source: containerStatus.source }
+            : {}),
+          ...(containerStatus.details
+            ? { container_details: containerStatus.details }
+            : {}),
+        },
+      };
+    }
+
+    return {
+      connected: false,
+      running: false,
+      apiReachable: false,
+      url: mailboxUrl,
+      port: ports.mailboxPort,
+      reason: 'Mailbox is not running',
+      diagnostics: {
+        reason: 'Mailbox is not running',
+        api_url: mailboxApiUrl,
+        ...(apiReachable.error ? { api_error: apiReachable.error } : {}),
+        ...(containerStatus.details
+          ? { container_details: containerStatus.details }
+          : {}),
+      },
+    };
+  }
+
+  private async resolveMailboxContainerStatus(): Promise<{
+    running: boolean;
+    source?: string;
+    details?: string;
+  }> {
+    const dockerComposeResult = await this.tryGetRunningServicesFromCommand(
+      'docker',
+      [
+        'compose',
+        '-f',
+        'docker-compose.dev.yml',
+        'ps',
+        '--status',
+        'running',
+        '--services',
+      ],
+      'docker-compose.dev.yml',
+    );
+
+    if (dockerComposeResult.running) {
+      return dockerComposeResult;
+    }
+
+    const supabaseDockerResult = await this.tryGetRunningServicesFromCommand(
+      'docker',
+      ['ps', '--format', '{{.Names}}'],
+      'docker ps',
+    );
+
+    return supabaseDockerResult;
+  }
+
+  private async tryGetRunningServicesFromCommand(
+    command: string,
+    args: string[],
+    source: string,
+  ): Promise<{ running: boolean; source?: string; details?: string }> {
+    try {
+      const result = await this.deps.executeCommand(command, args);
+      const serviceLines = result.stdout
+        .split('\n')
+        .map((line) => line.trim().toLowerCase())
+        .filter(Boolean);
+      const running = serviceLines.some((line) =>
+        /(mailpit|inbucket)/.test(line),
+      );
+
+      return {
+        running,
+        source,
+      };
+    } catch (error) {
+      const message = error instanceof Error ? error.message : 'Unknown error';
+
+      return {
+        running: false,
+        source,
+        details: message,
+      };
+    }
+  }
+
+  private async checkMailboxApi(url: string): Promise<{
+    ok: boolean;
+    error?: string;
+  }> {
+    try {
+      await this.deps.fetchJson(url);
+
+      return { ok: true };
+    } catch (error) {
+      return {
+        ok: false,
+        error: error instanceof Error ? error.message : 'Unknown error',
+      };
+    }
+  }
+
+  private async resolveSupabaseExtras() {
+    try {
+      const result = await this.deps.executeCommand('pnpm', [
+        '--filter',
+        'web',
+        'supabase',
+        'status',
+        '-o',
+        'env',
+      ]);
+
+      return parseSupabaseEnvOutput(result.stdout);
+    } catch {
+      try {
+        const result = await this.deps.executeCommand('pnpm', [
+          '--filter',
+          'web',
+          'supabase:status',
+        ]);
+
+        return parseSupabaseTextOutput(result.stdout);
+      } catch {
+        return {
+          api_url: undefined,
+          studio_url: undefined,
+          anon_key: undefined,
+          service_role_key: undefined,
+        };
+      }
+    }
+  }
+
+  private async stopProcess(pid: number) {
+    try {
+      await this.deps.killProcess(pid, 'SIGTERM');
+      await this.deps.sleep(200);
+      const running = await this.deps.isProcessRunning(pid);
+
+      if (running) {
+        await this.deps.killProcess(pid, 'SIGKILL');
+      }
+    } catch {
+      // noop - process may already be dead.
+    }
+  }
+}
+
+function parseSupabaseEnvOutput(output: string) {
+  const values: Record<string, string> = {};
+
+  for (const line of output.split('\n')) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith('#')) {
+      continue;
+    }
+
+    const idx = trimmed.indexOf('=');
+    if (idx <= 0) {
+      continue;
+    }
+
+    const key = trimmed.slice(0, idx).trim();
+    const value = trimmed.slice(idx + 1).trim();
+
+    if (key) {
+      values[key] = value;
+    }
+  }
+
+  return {
+    api_url: values.API_URL,
+    studio_url: values.STUDIO_URL,
+    anon_key: values.ANON_KEY,
+    service_role_key: values.SERVICE_ROLE_KEY,
+  };
+}
+
+function extractPortFromUrl(url: string | undefined): number | undefined {
+  if (!url) {
+    return undefined;
+  }
+
+  try {
+    const parsed = new URL(url);
+    const port = Number(parsed.port);
+
+    return Number.isFinite(port) && port > 0 ? port : undefined;
+  } catch {
+    return undefined;
+  }
+}
+
+function parseSupabaseTextOutput(output: string) {
+  const findValue = (label: string) => {
+    const regex = new RegExp(`${label}\\s*:\\s*(.+)`);
+    const match = output.match(regex);
+    return match?.[1]?.trim();
+  };
+
+  return {
+    api_url: findValue('API URL'),
+    studio_url: findValue('Studio URL'),
+    anon_key: findValue('anon key'),
+    service_role_key: findValue('service_role key'),
+  };
+}
+
+function extractForwardToUrl(command: string): string | undefined {
+  const match = command.match(/--forward-to\s+(\S+)/);
+  return match?.[1];
+}

packages/mcp-server/src/tools/dev/schema.ts

@@ -0,0 +1,69 @@
+import { z } from 'zod/v3';
+
+const DevServiceIdSchema = z.enum(['app', 'database', 'stripe', 'mailbox']);
+const DevServiceSelectionSchema = z.enum([
+  'all',
+  'app',
+  'database',
+  'stripe',
+  'mailbox',
+  'mailpit',
+]);
+
+const DevServiceStatusItemSchema = z.object({
+  id: DevServiceIdSchema,
+  name: z.string(),
+  status: z.enum(['running', 'stopped', 'error']),
+  port: z.number().nullable().optional(),
+  url: z.string().optional(),
+  pid: z.number().nullable().optional(),
+  webhook_url: z.string().optional(),
+  extras: z.record(z.string()).optional(),
+});
+
+export const KitDevStartInputSchema = z.object({
+  services: z.array(DevServiceSelectionSchema).min(1).default(['all']),
+});
+
+export const KitDevStartOutputSchema = z.object({
+  services: z.array(DevServiceStatusItemSchema),
+});
+
+export const KitDevStopInputSchema = z.object({
+  services: z.array(DevServiceSelectionSchema).min(1).default(['all']),
+});
+
+export const KitDevStopOutputSchema = z.object({
+  stopped: z.array(DevServiceIdSchema),
+});
+
+export const KitDevStatusInputSchema = z.object({});
+
+export const KitDevStatusOutputSchema = z.object({
+  services: z.array(DevServiceStatusItemSchema),
+});
+
+export const KitMailboxStatusInputSchema = z.object({});
+
+export const KitMailboxStatusOutputSchema = z.object({
+  connected: z.boolean(),
+  running: z.boolean(),
+  api_reachable: z.boolean(),
+  url: z.string().optional(),
+  port: z.number().optional(),
+  reason: z.string().optional(),
+});
+
+export type DevServiceId = z.infer<typeof DevServiceIdSchema>;
+export type DevServiceSelection = z.infer<typeof DevServiceSelectionSchema>;
+export type DevServiceStatusItem = z.infer<typeof DevServiceStatusItemSchema>;
+export type KitDevStartInput = z.infer<typeof KitDevStartInputSchema>;
+export type KitDevStartOutput = z.infer<typeof KitDevStartOutputSchema>;
+export type KitDevStopInput = z.infer<typeof KitDevStopInputSchema>;
+export type KitDevStopOutput = z.infer<typeof KitDevStopOutputSchema>;
+export type KitDevStatusInput = z.infer<typeof KitDevStatusInputSchema>;
+export type KitDevStatusOutput = z.infer<typeof KitDevStatusOutputSchema>;
+export type KitMailboxStatusInput = z.infer<typeof KitMailboxStatusInputSchema>;
+export type KitMailboxStatusOutput = z.infer<
+  typeof KitMailboxStatusOutputSchema
+>;

packages/mcp-server/src/tools/emails/__tests__/kit-emails.service.test.ts

@@ -0,0 +1,292 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  type KitEmailsDeps,
+  createKitEmailsService,
+} from '../kit-emails.service';
+
+function createDeps(
+  files: Record<string, string>,
+  directories: string[],
+): KitEmailsDeps {
+  const store = { ...files };
+  const dirSet = new Set(directories);
+
+  return {
+    rootPath: '/repo',
+    async readFile(filePath: string) {
+      if (!(filePath in store)) {
+        const error = new Error(
+          `ENOENT: no such file: ${filePath}`,
+        ) as NodeJS.ErrnoException;
+
+        error.code = 'ENOENT';
+        throw error;
+      }
+
+      return store[filePath]!;
+    },
+    async readdir(dirPath: string) {
+      if (!dirSet.has(dirPath)) {
+        return [];
+      }
+
+      return Object.keys(store)
+        .filter((p) => {
+          const parent = p.substring(0, p.lastIndexOf('/'));
+          return parent === dirPath;
+        })
+        .map((p) => p.substring(p.lastIndexOf('/') + 1));
+    },
+    async fileExists(filePath: string) {
+      return filePath in store || dirSet.has(filePath);
+    },
+    async renderReactEmail() {
+      return null;
+    },
+  };
+}
+
+const REACT_DIR = '/repo/packages/email-templates/src/emails';
+const SUPABASE_DIR = '/repo/apps/web/supabase/templates';
+
+describe('KitEmailsService.list', () => {
+  it('discovers React Email templates with -email suffix in id', async () => {
+    const deps = createDeps(
+      {
+        [`${REACT_DIR}/invite.email.tsx`]:
+          'export function renderInviteEmail() {}',
+        [`${REACT_DIR}/otp.email.tsx`]: 'export function renderOtpEmail() {}',
+      },
+      [REACT_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.list();
+
+    expect(result.templates).toHaveLength(2);
+    expect(result.categories).toEqual(['transactional']);
+    expect(result.total).toBe(2);
+
+    const invite = result.templates.find((t) => t.id === 'invite-email');
+
+    expect(invite).toBeDefined();
+    expect(invite!.name).toBe('Invite');
+    expect(invite!.category).toBe('transactional');
+    expect(invite!.file).toBe(
+      'packages/email-templates/src/emails/invite.email.tsx',
+    );
+
+    const otp = result.templates.find((t) => t.id === 'otp-email');
+
+    expect(otp).toBeDefined();
+    expect(otp!.name).toBe('Otp');
+  });
+
+  it('discovers Supabase Auth HTML templates', async () => {
+    const deps = createDeps(
+      {
+        [`${SUPABASE_DIR}/magic-link.html`]: '<html>magic</html>',
+        [`${SUPABASE_DIR}/reset-password.html`]: '<html>reset</html>',
+      },
+      [SUPABASE_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.list();
+
+    expect(result.templates).toHaveLength(2);
+    expect(result.categories).toEqual(['supabase-auth']);
+
+    const magicLink = result.templates.find((t) => t.id === 'magic-link');
+
+    expect(magicLink).toBeDefined();
+    expect(magicLink!.name).toBe('Magic Link');
+    expect(magicLink!.category).toBe('supabase-auth');
+    expect(magicLink!.file).toBe('apps/web/supabase/templates/magic-link.html');
+  });
+
+  it('discovers both types and returns sorted categories', async () => {
+    const deps = createDeps(
+      {
+        [`${REACT_DIR}/invite.email.tsx`]:
+          'export function renderInviteEmail() {}',
+        [`${SUPABASE_DIR}/confirm-email.html`]: '<html>confirm</html>',
+      },
+      [REACT_DIR, SUPABASE_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.list();
+
+    expect(result.templates).toHaveLength(2);
+    expect(result.categories).toEqual(['supabase-auth', 'transactional']);
+    expect(result.total).toBe(2);
+  });
+
+  it('handles empty directories gracefully', async () => {
+    const deps = createDeps({}, []);
+
+    const service = createKitEmailsService(deps);
+    const result = await service.list();
+
+    expect(result.templates).toEqual([]);
+    expect(result.categories).toEqual([]);
+    expect(result.total).toBe(0);
+  });
+
+  it('ignores non-email files in the directories', async () => {
+    const deps = createDeps(
+      {
+        [`${REACT_DIR}/invite.email.tsx`]:
+          'export function renderInviteEmail() {}',
+        [`${REACT_DIR}/utils.ts`]: 'export const helper = true;',
+        [`${REACT_DIR}/README.md`]: '# readme',
+        [`${SUPABASE_DIR}/magic-link.html`]: '<html>magic</html>',
+        [`${SUPABASE_DIR}/config.json`]: '{}',
+      },
+      [REACT_DIR, SUPABASE_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.list();
+
+    expect(result.templates).toHaveLength(2);
+  });
+
+  it('avoids id collision between React otp-email and Supabase otp', async () => {
+    const deps = createDeps(
+      {
+        [`${REACT_DIR}/otp.email.tsx`]: 'export function renderOtpEmail() {}',
+        [`${SUPABASE_DIR}/otp.html`]: '<html>otp</html>',
+      },
+      [REACT_DIR, SUPABASE_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.list();
+
+    const ids = result.templates.map((t) => t.id);
+
+    expect(ids).toContain('otp-email');
+    expect(ids).toContain('otp');
+    expect(new Set(ids).size).toBe(ids.length);
+  });
+});
+
+describe('KitEmailsService.read', () => {
+  it('reads a React Email template and extracts props', async () => {
+    const source = `
+interface Props {
+  teamName: string;
+  teamLogo?: string;
+  inviter: string | undefined;
+  invitedUserEmail: string;
+  link: string;
+  productName: string;
+  language?: string;
+}
+
+export async function renderInviteEmail(props: Props) {}
+`;
+
+    const deps = createDeps(
+      {
+        [`${REACT_DIR}/invite.email.tsx`]: source,
+      },
+      [REACT_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.read({ id: 'invite-email' });
+
+    expect(result.id).toBe('invite-email');
+    expect(result.name).toBe('Invite');
+    expect(result.category).toBe('transactional');
+    expect(result.source).toBe(source);
+
+    expect(result.props).toEqual([
+      { name: 'teamName', type: 'string', required: true },
+      { name: 'teamLogo', type: 'string', required: false },
+      { name: 'inviter', type: 'string | undefined', required: true },
+      { name: 'invitedUserEmail', type: 'string', required: true },
+      { name: 'link', type: 'string', required: true },
+      { name: 'productName', type: 'string', required: true },
+      { name: 'language', type: 'string', required: false },
+    ]);
+  });
+
+  it('reads a Supabase HTML template with empty props', async () => {
+    const html = '<html><body>Magic Link</body></html>';
+
+    const deps = createDeps(
+      {
+        [`${SUPABASE_DIR}/magic-link.html`]: html,
+      },
+      [SUPABASE_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.read({ id: 'magic-link' });
+
+    expect(result.id).toBe('magic-link');
+    expect(result.source).toBe(html);
+    expect(result.props).toEqual([]);
+  });
+
+  it('throws for unknown template id', async () => {
+    const deps = createDeps({}, []);
+
+    const service = createKitEmailsService(deps);
+
+    await expect(service.read({ id: 'nonexistent' })).rejects.toThrow(
+      'Email template not found: "nonexistent"',
+    );
+  });
+
+  it('handles templates without Props interface', async () => {
+    const source =
+      'export async function renderSimpleEmail() { return { html: "" }; }';
+
+    const deps = createDeps(
+      {
+        [`${REACT_DIR}/simple.email.tsx`]: source,
+      },
+      [REACT_DIR],
+    );
+
+    const service = createKitEmailsService(deps);
+    const result = await service.read({ id: 'simple-email' });
+
+    expect(result.props).toEqual([]);
+  });
+});
+
+describe('Path safety', () => {
+  it('rejects ids with path traversal', async () => {
+    const deps = createDeps({}, []);
+    const service = createKitEmailsService(deps);
+
+    await expect(service.read({ id: '../etc/passwd' })).rejects.toThrow(
+      'Template id must not contain ".."',
+    );
+  });
+
+  it('rejects ids with forward slashes', async () => {
+    const deps = createDeps({}, []);
+    const service = createKitEmailsService(deps);
+
+    await expect(service.read({ id: 'foo/bar' })).rejects.toThrow(
+      'Template id must not include path separators',
+    );
+  });
+
+  it('rejects ids with backslashes', async () => {
+    const deps = createDeps({}, []);
+    const service = createKitEmailsService(deps);
+
+    await expect(service.read({ id: 'foo\\bar' })).rejects.toThrow(
+      'Template id must not include path separators',
+    );
+  });
+});

packages/mcp-server/src/tools/emails/index.ts

@@ -0,0 +1,109 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+
+import {
+  type KitEmailsDeps,
+  createKitEmailsDeps,
+  createKitEmailsService,
+} from './kit-emails.service';
+import {
+  KitEmailsListInputSchema,
+  KitEmailsListOutputSchema,
+  KitEmailsReadInputSchema,
+  KitEmailsReadOutputSchema,
+} from './schema';
+
+type TextContent = {
+  type: 'text';
+  text: string;
+};
+
+export function registerKitEmailTemplatesTools(server: McpServer) {
+  const service = createKitEmailsService(createKitEmailsDeps());
+
+  server.registerTool(
+    'kit_email_templates_list',
+    {
+      description:
+        'List project email template files (React Email + Supabase auth templates), not received inbox messages',
+      inputSchema: KitEmailsListInputSchema,
+      outputSchema: KitEmailsListOutputSchema,
+    },
+    async () => {
+      try {
+        const result = await service.list();
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_email_templates_list', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_email_templates_read',
+    {
+      description:
+        'Read a project email template source file by template id, with extracted props and optional rendered HTML sample',
+      inputSchema: KitEmailsReadInputSchema,
+      outputSchema: KitEmailsReadOutputSchema,
+    },
+    async (input) => {
+      try {
+        const { id } = KitEmailsReadInputSchema.parse(input);
+        const result = await service.read({ id });
+
+        const content: TextContent[] = [];
+
+        // Return source, props, and metadata
+        const { renderedHtml, ...metadata } = result;
+
+        content.push({ type: 'text', text: JSON.stringify(metadata) });
+
+        // Include rendered HTML as a separate content block
+        if (renderedHtml) {
+          content.push({
+            type: 'text',
+            text: `\n\n--- Rendered HTML ---\n\n${renderedHtml}`,
+          });
+        }
+
+        return {
+          structuredContent: result,
+          content,
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_email_templates_read', error);
+      }
+    },
+  );
+}
+
+export const registerKitEmailsTools = registerKitEmailTemplatesTools;
+
+function buildErrorResponse(tool: string, error: unknown) {
+  const message = `${tool} failed: ${toErrorMessage(error)}`;
+
+  return {
+    isError: true,
+    content: buildTextContent(message),
+  };
+}
+
+function toErrorMessage(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+
+  return 'Unknown error';
+}
+
+function buildTextContent(text: string): TextContent[] {
+  return [{ type: 'text', text }];
+}
+
+export { createKitEmailsService, createKitEmailsDeps };
+export type { KitEmailsDeps };
+export type { KitEmailsListOutput, KitEmailsReadOutput } from './schema';

packages/mcp-server/src/tools/emails/kit-emails.service.ts

@@ -0,0 +1,289 @@
+import path from 'node:path';
+
+import { EMAIL_TEMPLATE_RENDERERS } from '@kit/email-templates/registry';
+
+import type { KitEmailsListOutput, KitEmailsReadOutput } from './schema';
+
+export interface KitEmailsDeps {
+  rootPath: string;
+  readFile(filePath: string): Promise<string>;
+  readdir(dirPath: string): Promise<string[]>;
+  fileExists(filePath: string): Promise<boolean>;
+  renderReactEmail(
+    sampleProps: Record<string, string>,
+    templateId: string,
+  ): Promise<string | null>;
+}
+
+interface EmailTemplate {
+  id: string;
+  name: string;
+  category: string;
+  file: string;
+  description: string;
+}
+
+export function createKitEmailsService(deps: KitEmailsDeps) {
+  return new KitEmailsService(deps);
+}
+
+export class KitEmailsService {
+  constructor(private readonly deps: KitEmailsDeps) {}
+
+  async list(): Promise<KitEmailsListOutput> {
+    const templates: EmailTemplate[] = [];
+
+    const reactTemplates = await this.discoverReactEmailTemplates();
+    const supabaseTemplates = await this.discoverSupabaseAuthTemplates();
+
+    templates.push(...reactTemplates, ...supabaseTemplates);
+
+    const categories = [...new Set(templates.map((t) => t.category))].sort();
+
+    return {
+      templates,
+      categories,
+      total: templates.length,
+    };
+  }
+
+  async read(input: { id: string }): Promise<KitEmailsReadOutput> {
+    assertSafeId(input.id);
+
+    const { templates } = await this.list();
+    const template = templates.find((t) => t.id === input.id);
+
+    if (!template) {
+      throw new Error(`Email template not found: "${input.id}"`);
+    }
+
+    const absolutePath = path.resolve(this.deps.rootPath, template.file);
+    ensureInsideRoot(absolutePath, this.deps.rootPath, input.id);
+
+    const source = await this.deps.readFile(absolutePath);
+    const isReactEmail = absolutePath.includes('packages/email-templates');
+    const props = isReactEmail ? extractPropsFromSource(source) : [];
+
+    let renderedHtml: string | null = null;
+
+    if (isReactEmail) {
+      const sampleProps = buildSampleProps(props);
+
+      renderedHtml = await this.deps.renderReactEmail(sampleProps, template.id);
+    }
+
+    return {
+      id: template.id,
+      name: template.name,
+      category: template.category,
+      file: template.file,
+      source,
+      props,
+      renderedHtml,
+    };
+  }
+
+  private async discoverReactEmailTemplates(): Promise<EmailTemplate[]> {
+    const dir = path.join('packages', 'email-templates', 'src', 'emails');
+
+    const absoluteDir = path.resolve(this.deps.rootPath, dir);
+
+    if (!(await this.deps.fileExists(absoluteDir))) {
+      return [];
+    }
+
+    const files = await this.deps.readdir(absoluteDir);
+    const templates: EmailTemplate[] = [];
+
+    for (const file of files) {
+      if (!file.endsWith('.email.tsx')) {
+        continue;
+      }
+
+      const stem = file.replace(/\.email\.tsx$/, '');
+      const id = `${stem}-email`;
+      const name = humanize(stem);
+
+      templates.push({
+        id,
+        name,
+        category: 'transactional',
+        file: path.join(dir, file),
+        description: `${name} transactional email template`,
+      });
+    }
+
+    return templates.sort((a, b) => a.id.localeCompare(b.id));
+  }
+
+  private async discoverSupabaseAuthTemplates(): Promise<EmailTemplate[]> {
+    const dir = path.join('apps', 'web', 'supabase', 'templates');
+
+    const absoluteDir = path.resolve(this.deps.rootPath, dir);
+
+    if (!(await this.deps.fileExists(absoluteDir))) {
+      return [];
+    }
+
+    const files = await this.deps.readdir(absoluteDir);
+    const templates: EmailTemplate[] = [];
+
+    for (const file of files) {
+      if (!file.endsWith('.html')) {
+        continue;
+      }
+
+      const id = file.replace(/\.html$/, '');
+      const name = humanize(id);
+
+      templates.push({
+        id,
+        name,
+        category: 'supabase-auth',
+        file: path.join(dir, file),
+        description: `${name} Supabase auth email template`,
+      });
+    }
+
+    return templates.sort((a, b) => a.id.localeCompare(b.id));
+  }
+}
+
+function humanize(kebab: string): string {
+  return kebab
+    .split('-')
+    .map((word) => word.charAt(0).toUpperCase() + word.slice(1))
+    .join(' ');
+}
+
+function extractPropsFromSource(
+  source: string,
+): Array<{ name: string; type: string; required: boolean }> {
+  const interfaceMatch = source.match(/interface\s+Props\s*\{([^}]*)\}/);
+
+  if (!interfaceMatch?.[1]) {
+    return [];
+  }
+
+  const body = interfaceMatch[1];
+  const props: Array<{ name: string; type: string; required: boolean }> = [];
+
+  const propRegex = /(\w+)(\??):\s*([^;\n]+)/g;
+  let match: RegExpExecArray | null;
+
+  while ((match = propRegex.exec(body)) !== null) {
+    const name = match[1]!;
+    const optional = match[2] === '?';
+    const type = match[3]!.trim();
+
+    props.push({
+      name,
+      type,
+      required: !optional,
+    });
+  }
+
+  return props;
+}
+
+function ensureInsideRoot(resolved: string, root: string, input: string) {
+  const normalizedRoot = root.endsWith(path.sep) ? root : `${root}${path.sep}`;
+
+  if (!resolved.startsWith(normalizedRoot) && resolved !== root) {
+    throw new Error(
+      `Invalid path: "${input}" resolves outside the project root`,
+    );
+  }
+
+  return resolved;
+}
+
+function buildSampleProps(
+  props: Array<{ name: string; type: string; required: boolean }>,
+): Record<string, string> {
+  const sample: Record<string, string> = {};
+
+  for (const prop of props) {
+    if (prop.name === 'language') continue;
+
+    sample[prop.name] = SAMPLE_PROP_VALUES[prop.name] ?? `Sample ${prop.name}`;
+  }
+
+  return sample;
+}
+
+const SAMPLE_PROP_VALUES: Record<string, string> = {
+  productName: 'Makerkit',
+  teamName: 'Acme Team',
+  inviter: 'John Doe',
+  invitedUserEmail: 'user@example.com',
+  link: 'https://example.com/action',
+  otp: '123456',
+  email: 'user@example.com',
+  name: 'Jane Doe',
+  userName: 'Jane Doe',
+};
+
+function assertSafeId(id: string) {
+  if (id.includes('..')) {
+    throw new Error('Template id must not contain ".."');
+  }
+
+  if (id.includes('/') || id.includes('\\')) {
+    throw new Error('Template id must not include path separators');
+  }
+}
+
+export function createKitEmailsDeps(rootPath = process.cwd()): KitEmailsDeps {
+  return {
+    rootPath,
+    async readFile(filePath: string) {
+      const fs = await import('node:fs/promises');
+      return fs.readFile(filePath, 'utf8');
+    },
+    async readdir(dirPath: string) {
+      const fs = await import('node:fs/promises');
+      return fs.readdir(dirPath);
+    },
+    async fileExists(filePath: string) {
+      const fs = await import('node:fs/promises');
+
+      try {
+        await fs.access(filePath);
+        return true;
+      } catch {
+        return false;
+      }
+    },
+    async renderReactEmail(
+      sampleProps: Record<string, string>,
+      templateId?: string,
+    ) {
+      const renderFromRegistry =
+        typeof templateId === 'string'
+          ? EMAIL_TEMPLATE_RENDERERS?.[templateId]
+          : undefined;
+
+      if (typeof renderFromRegistry === 'function') {
+        const result = await renderFromRegistry(sampleProps);
+
+        if (typeof result === 'string') {
+          return result;
+        }
+
+        if (
+          typeof result === 'object' &&
+          result !== null &&
+          'html' in result &&
+          typeof (result as { html: unknown }).html === 'string'
+        ) {
+          return (result as { html: string }).html;
+        }
+
+        return null;
+      }
+
+      throw new Error(`Email template renderer not found: "${templateId}"`);
+    },
+  };
+}

packages/mcp-server/src/tools/emails/schema.ts

@@ -0,0 +1,46 @@
+import { z } from 'zod/v3';
+
+export const KitEmailsListInputSchema = z.object({});
+
+const EmailTemplateSchema = z.object({
+  id: z.string(),
+  name: z.string(),
+  category: z.string(),
+  file: z.string(),
+  description: z.string(),
+});
+
+const KitEmailsListSuccessOutputSchema = z.object({
+  templates: z.array(EmailTemplateSchema),
+  categories: z.array(z.string()),
+  total: z.number(),
+});
+
+export const KitEmailsListOutputSchema = KitEmailsListSuccessOutputSchema;
+
+export const KitEmailsReadInputSchema = z.object({
+  id: z.string().min(1),
+});
+
+const PropSchema = z.object({
+  name: z.string(),
+  type: z.string(),
+  required: z.boolean(),
+});
+
+const KitEmailsReadSuccessOutputSchema = z.object({
+  id: z.string(),
+  name: z.string(),
+  category: z.string(),
+  file: z.string(),
+  source: z.string(),
+  props: z.array(PropSchema),
+  renderedHtml: z.string().nullable(),
+});
+
+export const KitEmailsReadOutputSchema = KitEmailsReadSuccessOutputSchema;
+
+export type KitEmailsListInput = z.infer<typeof KitEmailsListInputSchema>;
+export type KitEmailsListOutput = z.infer<typeof KitEmailsListOutputSchema>;
+export type KitEmailsReadInput = z.infer<typeof KitEmailsReadInputSchema>;
+export type KitEmailsReadOutput = z.infer<typeof KitEmailsReadOutputSchema>;

packages/mcp-server/src/tools/env/__tests__/kit-env.service.test.ts

@@ -0,0 +1,845 @@
+import { describe, expect, it } from 'vitest';
+
+import { type KitEnvDeps, createKitEnvService } from '../kit-env.service';
+import { processEnvDefinitions } from '../scanner';
+import { KitEnvUpdateInputSchema } from '../schema';
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+function createDeps(
+  files: Record<string, string> = {},
+  overrides: Partial<KitEnvDeps> = {},
+): KitEnvDeps & { _store: Record<string, string> } {
+  const store = { ...files };
+
+  return {
+    rootPath: '/repo',
+    async readFile(filePath: string) {
+      if (!(filePath in store)) {
+        const error = new Error(
+          `ENOENT: no such file: ${filePath}`,
+        ) as NodeJS.ErrnoException;
+        error.code = 'ENOENT';
+        throw error;
+      }
+      return store[filePath]!;
+    },
+    async writeFile(filePath: string, content: string) {
+      store[filePath] = content;
+    },
+    async fileExists(filePath: string) {
+      return filePath in store;
+    },
+    ...overrides,
+    get _store() {
+      return store;
+    },
+  } as KitEnvDeps & { _store: Record<string, string> };
+}
+
+// ---------------------------------------------------------------------------
+// getSchema
+// ---------------------------------------------------------------------------
+
+describe('KitEnvService.getSchema', () => {
+  it('returns grouped env variables with expected shape', async () => {
+    const service = createKitEnvService(createDeps());
+    const result = await service.getSchema();
+
+    expect(result.groups.length).toBeGreaterThan(0);
+
+    for (const group of result.groups) {
+      expect(group.name).toBeTruthy();
+      expect(group.description).toBeTruthy();
+      expect(group.variables.length).toBeGreaterThan(0);
+
+      for (const variable of group.variables) {
+        expect(variable.key).toBeTruthy();
+        expect(typeof variable.required).toBe('boolean');
+        expect(typeof variable.sensitive).toBe('boolean');
+        expect(
+          ['string', 'url', 'email', 'number', 'boolean', 'enum'].includes(
+            variable.type,
+          ),
+        ).toBe(true);
+      }
+    }
+  });
+
+  it('includes Stripe variables with dependency metadata', async () => {
+    const service = createKitEnvService(createDeps());
+    const result = await service.getSchema();
+
+    const billingGroup = result.groups.find((g) => g.name === 'Billing');
+    expect(billingGroup).toBeDefined();
+
+    const stripeSecret = billingGroup!.variables.find(
+      (v) => v.key === 'STRIPE_SECRET_KEY',
+    );
+    expect(stripeSecret).toBeDefined();
+    expect(stripeSecret!.sensitive).toBe(true);
+    expect(stripeSecret!.dependencies).toBeDefined();
+    expect(stripeSecret!.dependencies!.length).toBeGreaterThan(0);
+    expect(stripeSecret!.dependencies![0]!.variable).toBe(
+      'NEXT_PUBLIC_BILLING_PROVIDER',
+    );
+  });
+});
+
+// ---------------------------------------------------------------------------
+// update
+// ---------------------------------------------------------------------------
+
+describe('KitEnvService.update', () => {
+  it('replaces an existing key in-place', async () => {
+    const deps = createDeps({
+      '/repo/apps/web/.env.local':
+        '# Comment\nEMAIL_SENDER=team@example.com\nOTHER=foo\n',
+    });
+
+    const service = createKitEnvService(deps);
+
+    const result = await service.update({
+      key: 'EMAIL_SENDER',
+      value: 'hello@example.com',
+      file: '.env.local',
+    });
+
+    expect(result.success).toBe(true);
+
+    const content = deps._store['/repo/apps/web/.env.local']!;
+    expect(content).toContain('EMAIL_SENDER=hello@example.com');
+    // preserves comment
+    expect(content).toContain('# Comment');
+    // preserves other keys
+    expect(content).toContain('OTHER=foo');
+  });
+
+  it('appends new key when it does not exist', async () => {
+    const deps = createDeps({
+      '/repo/apps/web/.env.local': 'EXISTING=value\n',
+    });
+
+    const service = createKitEnvService(deps);
+
+    await service.update({
+      key: 'NEW_KEY',
+      value: 'new_value',
+      file: '.env.local',
+    });
+
+    const content = deps._store['/repo/apps/web/.env.local']!;
+    expect(content).toContain('EXISTING=value');
+    expect(content).toContain('NEW_KEY=new_value');
+  });
+
+  it('creates file if it does not exist', async () => {
+    const deps = createDeps({});
+
+    const service = createKitEnvService(deps);
+
+    await service.update({
+      key: 'BRAND_NEW',
+      value: 'value',
+      file: '.env.local',
+    });
+
+    const content = deps._store['/repo/apps/web/.env.local']!;
+    expect(content).toContain('BRAND_NEW=value');
+  });
+
+  it('throws when key is missing', async () => {
+    const service = createKitEnvService(createDeps());
+
+    await expect(service.update({ value: 'v' })).rejects.toThrow(
+      'Both key and value are required',
+    );
+  });
+
+  it('throws when value is missing', async () => {
+    const service = createKitEnvService(createDeps());
+
+    await expect(service.update({ key: 'FOO' })).rejects.toThrow(
+      'Both key and value are required',
+    );
+  });
+
+  it('resolves default file for secret key in development mode', async () => {
+    const deps = createDeps({});
+
+    const service = createKitEnvService(deps);
+
+    // STRIPE_SECRET_KEY is marked as secret in the model
+    await service.update({
+      key: 'STRIPE_SECRET_KEY',
+      value: 'sk_test_123',
+      mode: 'development',
+    });
+
+    // Secret keys default to .env.local in dev mode
+    expect(deps._store['/repo/apps/web/.env.local']).toContain(
+      'STRIPE_SECRET_KEY=sk_test_123',
+    );
+  });
+
+  it('resolves default file for key without explicit secret flag (defaults to secret)', async () => {
+    const deps = createDeps({});
+
+    const service = createKitEnvService(deps);
+
+    // NEXT_PUBLIC_SITE_URL has no explicit `secret` field in the model.
+    // resolveDefaultFile defaults unknown to secret=true (conservative),
+    // so it should go to .env.local in development mode.
+    await service.update({
+      key: 'NEXT_PUBLIC_SITE_URL',
+      value: 'http://localhost:3000',
+      mode: 'development',
+    });
+
+    expect(deps._store['/repo/apps/web/.env.local']).toContain(
+      'NEXT_PUBLIC_SITE_URL=http://localhost:3000',
+    );
+  });
+
+  it('resolves default file for secret key in production mode', async () => {
+    const deps = createDeps({});
+
+    const service = createKitEnvService(deps);
+
+    await service.update({
+      key: 'STRIPE_SECRET_KEY',
+      value: 'sk_live_abc',
+      mode: 'production',
+    });
+
+    // Secret keys in prod default to .env.production.local
+    expect(deps._store['/repo/apps/web/.env.production.local']).toContain(
+      'STRIPE_SECRET_KEY=sk_live_abc',
+    );
+  });
+
+  it('does not default file in MCP schema', () => {
+    const parsed = KitEnvUpdateInputSchema.parse({
+      key: 'FOO',
+      value: 'bar',
+      mode: 'production',
+    });
+
+    expect(parsed.file).toBeUndefined();
+  });
+});
+
+// ---------------------------------------------------------------------------
+// Path traversal prevention
+// ---------------------------------------------------------------------------
+
+describe('KitEnvService — path traversal prevention', () => {
+  it('rejects file paths that traverse outside web directory', async () => {
+    const service = createKitEnvService(createDeps());
+
+    await expect(service.rawRead('../../../../etc/passwd')).rejects.toThrow(
+      'resolves outside the web app directory',
+    );
+  });
+
+  it('rejects rawWrite with traversal path', async () => {
+    const service = createKitEnvService(createDeps());
+
+    await expect(
+      service.rawWrite('../../../etc/evil', 'malicious'),
+    ).rejects.toThrow('resolves outside the web app directory');
+  });
+
+  it('rejects update with traversal file path', async () => {
+    const service = createKitEnvService(createDeps());
+
+    await expect(
+      service.update({ key: 'FOO', value: 'bar', file: '../../.env' }),
+    ).rejects.toThrow('resolves outside the web app directory');
+  });
+
+  it('allows valid file names within web directory', async () => {
+    const deps = createDeps({
+      '/repo/apps/web/.env.local': 'KEY=val',
+    });
+
+    const service = createKitEnvService(deps);
+
+    const result = await service.rawRead('.env.local');
+    expect(result.exists).toBe(true);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// rawRead / rawWrite
+// ---------------------------------------------------------------------------
+
+describe('KitEnvService.rawRead', () => {
+  it('returns content when file exists', async () => {
+    const service = createKitEnvService(
+      createDeps({
+        '/repo/apps/web/.env.local': '# My env\nFOO=bar\n',
+      }),
+    );
+
+    const result = await service.rawRead('.env.local');
+
+    expect(result.exists).toBe(true);
+    expect(result.content).toBe('# My env\nFOO=bar\n');
+  });
+
+  it('returns empty + exists:false when file missing', async () => {
+    const service = createKitEnvService(createDeps({}));
+
+    const result = await service.rawRead('.env.local');
+
+    expect(result.exists).toBe(false);
+    expect(result.content).toBe('');
+  });
+});
+
+describe('KitEnvService.rawWrite', () => {
+  it('overwrites file with raw content', async () => {
+    const deps = createDeps({
+      '/repo/apps/web/.env.local': 'OLD=content',
+    });
+
+    const service = createKitEnvService(deps);
+
+    const result = await service.rawWrite('.env.local', '# New\nNEW=value');
+
+    expect(result.success).toBe(true);
+    expect(deps._store['/repo/apps/web/.env.local']).toBe('# New\nNEW=value');
+  });
+
+  it('creates file when it does not exist', async () => {
+    const deps = createDeps({});
+
+    const service = createKitEnvService(deps);
+
+    await service.rawWrite('.env.production', 'PROD_KEY=val');
+
+    expect(deps._store['/repo/apps/web/.env.production']).toBe('PROD_KEY=val');
+  });
+});
+
+// ---------------------------------------------------------------------------
+// read — mode-based file precedence
+// ---------------------------------------------------------------------------
+
+describe('KitEnvService.read — file precedence', () => {
+  it('returns variables with mode information when pointing to real workspace', async () => {
+    // Use the actual monorepo root — will scan real .env files
+    const service = createKitEnvService(
+      createDeps(
+        {},
+        { rootPath: process.cwd().replace(/\/packages\/mcp-server$/, '') },
+      ),
+    );
+
+    const result = await service.read('development');
+
+    expect(result.mode).toBe('development');
+    expect(typeof result.variables).toBe('object');
+  });
+});
+
+// ---------------------------------------------------------------------------
+// getAppState / getVariable — injected fs
+// ---------------------------------------------------------------------------
+
+describe('KitEnvService — injected fs', () => {
+  it('getAppState reads from injected fs', async () => {
+    const deps = createDeps(
+      {
+        '/repo/apps/web/.env': 'FOO=bar\n',
+      },
+      {
+        readdir: async (dirPath: string) => {
+          if (dirPath === '/repo/apps') {
+            return ['web'];
+          }
+          return [];
+        },
+        stat: async (path: string) => ({
+          isDirectory: () => path === '/repo/apps/web',
+        }),
+      },
+    );
+
+    const service = createKitEnvService(deps);
+    const states = await service.getAppState('development');
+
+    expect(states).toHaveLength(1);
+    expect(states[0]!.variables['FOO']!.effectiveValue).toBe('bar');
+  });
+
+  it('getVariable reads from injected fs', async () => {
+    const deps = createDeps(
+      {
+        '/repo/apps/web/.env': 'HELLO=world\n',
+      },
+      {
+        readdir: async (dirPath: string) => {
+          if (dirPath === '/repo/apps') {
+            return ['web'];
+          }
+          return [];
+        },
+        stat: async (path: string) => ({
+          isDirectory: () => path === '/repo/apps/web',
+        }),
+      },
+    );
+
+    const service = createKitEnvService(deps);
+    const value = await service.getVariable('HELLO', 'development');
+
+    expect(value).toBe('world');
+  });
+});
+
+// ---------------------------------------------------------------------------
+// processEnvDefinitions — override chains
+// ---------------------------------------------------------------------------
+
+describe('processEnvDefinitions — override chains', () => {
+  it('resolves override with development precedence (.env < .env.development < .env.local)', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://base.com',
+          source: '.env',
+        },
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://dev.com',
+          source: '.env.development',
+        },
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://local.com',
+          source: '.env.local',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const variable = result.variables['NEXT_PUBLIC_SITE_URL'];
+
+    expect(variable).toBeDefined();
+    // .env.local has highest precedence in development
+    expect(variable!.effectiveValue).toBe('https://local.com');
+    expect(variable!.effectiveSource).toBe('.env.local');
+    expect(variable!.isOverridden).toBe(true);
+    expect(variable!.definitions).toHaveLength(3);
+  });
+
+  it('resolves override with production precedence (.env < .env.production < .env.local < .env.production.local)', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://base.com',
+          source: '.env',
+        },
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://prod.com',
+          source: '.env.production',
+        },
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://local.com',
+          source: '.env.local',
+        },
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://prod-local.com',
+          source: '.env.production.local',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'production');
+    const variable = result.variables['NEXT_PUBLIC_SITE_URL'];
+
+    expect(variable!.effectiveValue).toBe('https://prod-local.com');
+    expect(variable!.effectiveSource).toBe('.env.production.local');
+    expect(variable!.isOverridden).toBe(true);
+  });
+
+  it('marks single-source variable as NOT overridden', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://site.com',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const variable = result.variables['NEXT_PUBLIC_SITE_URL'];
+
+    expect(variable!.isOverridden).toBe(false);
+    expect(variable!.effectiveSource).toBe('.env');
+  });
+});
+
+// ---------------------------------------------------------------------------
+// processEnvDefinitions — conditional requirements (Stripe keys)
+// ---------------------------------------------------------------------------
+
+describe('processEnvDefinitions — conditional requirements', () => {
+  it('flags STRIPE_SECRET_KEY as invalid when billing provider is stripe and key is missing', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_BILLING_PROVIDER',
+          value: 'stripe',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+
+    const stripeKey = result.variables['STRIPE_SECRET_KEY'];
+    expect(stripeKey).toBeDefined();
+    expect(stripeKey!.effectiveSource).toBe('MISSING');
+    expect(stripeKey!.validation.success).toBe(false);
+    expect(stripeKey!.validation.error.issues.length).toBeGreaterThan(0);
+
+    // Regression guard: contextual message must be preserved, NOT replaced
+    // by generic "required but missing"
+    expect(
+      stripeKey!.validation.error.issues.some((i) =>
+        i.includes('NEXT_PUBLIC_BILLING_PROVIDER'),
+      ),
+    ).toBe(true);
+  });
+
+  it('does NOT flag STRIPE_SECRET_KEY when billing provider is lemon-squeezy', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_BILLING_PROVIDER',
+          value: 'lemon-squeezy',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+
+    const stripeKey = result.variables['STRIPE_SECRET_KEY'];
+    expect(stripeKey).toBeUndefined();
+  });
+
+  it('flags LEMON_SQUEEZY_SECRET_KEY as invalid when provider is lemon-squeezy and key is missing', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_BILLING_PROVIDER',
+          value: 'lemon-squeezy',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+
+    const lsKey = result.variables['LEMON_SQUEEZY_SECRET_KEY'];
+    expect(lsKey).toBeDefined();
+    expect(lsKey!.effectiveSource).toBe('MISSING');
+    expect(lsKey!.validation.success).toBe(false);
+  });
+
+  it('validates Stripe key format (must start with sk_ or rk_)', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_BILLING_PROVIDER',
+          value: 'stripe',
+          source: '.env',
+        },
+        {
+          key: 'STRIPE_SECRET_KEY',
+          value: 'invalid_key_123',
+          source: '.env.local',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const stripeKey = result.variables['STRIPE_SECRET_KEY'];
+
+    expect(stripeKey).toBeDefined();
+    expect(stripeKey!.validation.success).toBe(false);
+    expect(
+      stripeKey!.validation.error.issues.some(
+        (i) =>
+          i.toLowerCase().includes('sk_') || i.toLowerCase().includes('rk_'),
+      ),
+    ).toBe(true);
+  });
+
+  it('passes Stripe key validation when key format is correct', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_BILLING_PROVIDER',
+          value: 'stripe',
+          source: '.env',
+        },
+        {
+          key: 'STRIPE_SECRET_KEY',
+          value: 'sk_test_abc123',
+          source: '.env.local',
+        },
+        {
+          key: 'NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY',
+          value: 'pk_test_abc123',
+          source: '.env',
+        },
+        {
+          key: 'STRIPE_WEBHOOK_SECRET',
+          value: 'whsec_abc123',
+          source: '.env.local',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const stripeKey = result.variables['STRIPE_SECRET_KEY'];
+
+    expect(stripeKey!.validation.success).toBe(true);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// processEnvDefinitions — cross-variable validations
+// ---------------------------------------------------------------------------
+
+describe('processEnvDefinitions — cross-variable validations', () => {
+  it('flags SUPABASE_SERVICE_ROLE_KEY when same as ANON_KEY', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SUPABASE_URL',
+          value: 'http://localhost:54321',
+          source: '.env',
+        },
+        {
+          key: 'NEXT_PUBLIC_SUPABASE_ANON_KEY',
+          value: 'same-key',
+          source: '.env',
+        },
+        {
+          key: 'SUPABASE_SERVICE_ROLE_KEY',
+          value: 'same-key',
+          source: '.env.local',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const serviceKey = result.variables['SUPABASE_SERVICE_ROLE_KEY'];
+
+    expect(serviceKey).toBeDefined();
+    expect(serviceKey!.validation.success).toBe(false);
+    expect(
+      serviceKey!.validation.error.issues.some((i) =>
+        i.toLowerCase().includes('different'),
+      ),
+    ).toBe(true);
+  });
+
+  it('passes when SUPABASE_SERVICE_ROLE_KEY differs from ANON_KEY', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SUPABASE_URL',
+          value: 'http://localhost:54321',
+          source: '.env',
+        },
+        {
+          key: 'NEXT_PUBLIC_SUPABASE_ANON_KEY',
+          value: 'anon-key-123',
+          source: '.env',
+        },
+        {
+          key: 'SUPABASE_SERVICE_ROLE_KEY',
+          value: 'service-key-456',
+          source: '.env.local',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const serviceKey = result.variables['SUPABASE_SERVICE_ROLE_KEY'];
+
+    expect(serviceKey!.validation.success).toBe(true);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// processEnvDefinitions — mode-aware URL validation
+// ---------------------------------------------------------------------------
+
+describe('processEnvDefinitions — mode-aware validations', () => {
+  it('accepts http:// SITE_URL in development mode', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'http://localhost:3000',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const siteUrl = result.variables['NEXT_PUBLIC_SITE_URL'];
+
+    expect(siteUrl!.validation.success).toBe(true);
+  });
+
+  it('rejects http:// SITE_URL in production mode', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'http://example.com',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'production');
+    const siteUrl = result.variables['NEXT_PUBLIC_SITE_URL'];
+
+    expect(siteUrl!.validation.success).toBe(false);
+    expect(
+      siteUrl!.validation.error.issues.some((i) =>
+        i.toLowerCase().includes('https'),
+      ),
+    ).toBe(true);
+  });
+
+  it('accepts https:// SITE_URL in production mode', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_SITE_URL',
+          value: 'https://example.com',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'production');
+    const siteUrl = result.variables['NEXT_PUBLIC_SITE_URL'];
+
+    expect(siteUrl!.validation.success).toBe(true);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// processEnvDefinitions — missing required variables
+// ---------------------------------------------------------------------------
+
+describe('processEnvDefinitions — missing required variables', () => {
+  it('injects missing required variables with MISSING source', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_BILLING_PROVIDER',
+          value: 'stripe',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+
+    // NEXT_PUBLIC_SITE_URL is required and missing
+    const siteUrl = result.variables['NEXT_PUBLIC_SITE_URL'];
+    expect(siteUrl).toBeDefined();
+    expect(siteUrl!.effectiveSource).toBe('MISSING');
+    expect(siteUrl!.validation.success).toBe(false);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// processEnvDefinitions — CAPTCHA conditional dependency
+// ---------------------------------------------------------------------------
+
+describe('processEnvDefinitions — CAPTCHA conditional dependency', () => {
+  it('flags CAPTCHA_SECRET_TOKEN as required when CAPTCHA_SITE_KEY is set', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [
+        {
+          key: 'NEXT_PUBLIC_CAPTCHA_SITE_KEY',
+          value: 'cap_site_123',
+          source: '.env',
+        },
+      ],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+    const captchaSecret = result.variables['CAPTCHA_SECRET_TOKEN'];
+
+    expect(captchaSecret).toBeDefined();
+    expect(captchaSecret!.effectiveSource).toBe('MISSING');
+    expect(captchaSecret!.validation.success).toBe(false);
+  });
+
+  it('does NOT flag CAPTCHA_SECRET_TOKEN when CAPTCHA_SITE_KEY is empty/absent', () => {
+    const envInfo = {
+      appName: 'web',
+      filePath: '/repo/apps/web',
+      variables: [],
+    };
+
+    const result = processEnvDefinitions(envInfo, 'development');
+
+    const captchaSecret = result.variables['CAPTCHA_SECRET_TOKEN'];
+    expect(captchaSecret).toBeUndefined();
+  });
+});

packages/mcp-server/src/tools/env/index.ts

@@ -0,0 +1,177 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+
+import {
+  type KitEnvDeps,
+  createKitEnvDeps,
+  createKitEnvService,
+} from './kit-env.service';
+import {
+  KitEnvRawReadInputSchema,
+  KitEnvRawReadOutputSchema,
+  KitEnvRawWriteInputSchema,
+  KitEnvRawWriteOutputSchema,
+  KitEnvReadInputSchema,
+  KitEnvReadOutputSchema,
+  KitEnvSchemaInputSchema,
+  KitEnvSchemaOutputSchema,
+  KitEnvUpdateInputSchema,
+  KitEnvUpdateOutputSchema,
+} from './schema';
+
+type TextContent = {
+  type: 'text';
+  text: string;
+};
+
+export function registerKitEnvTools(server: McpServer) {
+  const service = createKitEnvService(createKitEnvDeps());
+
+  server.registerTool(
+    'kit_env_schema',
+    {
+      description: 'Return environment variable schema for this kit variant',
+      inputSchema: KitEnvSchemaInputSchema,
+      outputSchema: KitEnvSchemaOutputSchema,
+    },
+    async () => {
+      try {
+        const result = await service.getSchema();
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_env_schema', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_env_read',
+    {
+      description: 'Read environment variables and validation state',
+      inputSchema: KitEnvReadInputSchema,
+      outputSchema: KitEnvReadOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitEnvReadInputSchema.parse(input);
+        const result = await service.read(parsed.mode);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_env_read', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_env_update',
+    {
+      description: 'Update one environment variable in a target .env file',
+      inputSchema: KitEnvUpdateInputSchema,
+      outputSchema: KitEnvUpdateOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitEnvUpdateInputSchema.parse(input);
+        const result = await service.update(parsed);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_env_update', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_env_raw_read',
+    {
+      description: 'Read raw content of an .env file',
+      inputSchema: KitEnvRawReadInputSchema,
+      outputSchema: KitEnvRawReadOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitEnvRawReadInputSchema.parse(input);
+        const result = await service.rawRead(parsed.file);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_env_raw_read', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_env_raw_write',
+    {
+      description: 'Write raw content to an .env file',
+      inputSchema: KitEnvRawWriteInputSchema,
+      outputSchema: KitEnvRawWriteOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitEnvRawWriteInputSchema.parse(input);
+        const result = await service.rawWrite(parsed.file, parsed.content);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_env_raw_write', error);
+      }
+    },
+  );
+}
+
+function buildErrorResponse(tool: string, error: unknown) {
+  const message = `${tool} failed: ${toErrorMessage(error)}`;
+
+  return {
+    isError: true,
+    content: buildTextContent(message),
+  };
+}
+
+function toErrorMessage(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+
+  return 'Unknown error';
+}
+
+function buildTextContent(text: string): TextContent[] {
+  return [{ type: 'text', text }];
+}
+
+export {
+  createKitEnvService,
+  createKitEnvDeps,
+  envVariables,
+  findWorkspaceRoot,
+  scanMonorepoEnv,
+  processEnvDefinitions,
+  getEnvState,
+  getVariable,
+} from './public-api';
+export type { KitEnvDeps };
+export type { EnvVariableModel } from './model';
+export type {
+  EnvMode,
+  AppEnvState,
+  EnvFileInfo,
+  EnvVariableState,
+} from './types';

packages/mcp-server/src/tools/env/kit-env.service.ts

@@ -0,0 +1,320 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+import { envVariables } from './model';
+import { getEnvState } from './scanner';
+import type { EnvMode, ScanFs } from './types';
+
+export interface KitEnvDeps {
+  rootPath: string;
+  readFile(filePath: string): Promise<string>;
+  writeFile(filePath: string, content: string): Promise<void>;
+  fileExists(filePath: string): Promise<boolean>;
+  readdir?(dirPath: string): Promise<string[]>;
+  stat?(path: string): Promise<{ isDirectory(): boolean }>;
+}
+
+export function createKitEnvService(deps: KitEnvDeps) {
+  return new KitEnvService(deps);
+}
+
+export class KitEnvService {
+  constructor(private readonly deps: KitEnvDeps) {}
+
+  async getSchema() {
+    const groups = new Map<
+      string,
+      Array<{
+        key: string;
+        label: string;
+        description: string;
+        required: boolean;
+        type: 'string' | 'url' | 'email' | 'number' | 'boolean' | 'enum';
+        sensitive: boolean;
+        values?: string[];
+        hint?: string;
+        dependencies?: Array<{ variable: string; condition: string }>;
+      }>
+    >();
+
+    for (const variable of envVariables) {
+      const category = variable.category;
+
+      if (!groups.has(category)) {
+        groups.set(category, []);
+      }
+
+      groups.get(category)!.push({
+        key: variable.name,
+        label: variable.displayName,
+        description: variable.description,
+        required: variable.required ?? false,
+        type: mapType(variable.type),
+        sensitive: variable.secret ?? false,
+        values: variable.values?.filter(
+          (v): v is string => typeof v === 'string',
+        ),
+        hint: variable.hint,
+        dependencies: variable.contextualValidation?.dependencies.map(
+          (dep) => ({
+            variable: dep.variable,
+            condition: dep.message,
+          }),
+        ),
+      });
+    }
+
+    return {
+      groups: Array.from(groups.entries()).map(([name, variables]) => ({
+        name,
+        description: `${name} configuration`,
+        variables,
+      })),
+    };
+  }
+
+  async read(mode: EnvMode) {
+    const scanFs = this.getScanFs();
+    const states = await getEnvState({
+      mode,
+      apps: ['web'],
+      rootDir: this.deps.rootPath,
+      fs: scanFs,
+    });
+
+    const webState = states.find((state) => state.appName === 'web');
+
+    if (!webState) {
+      return {
+        mode,
+        variables: {},
+      };
+    }
+
+    const allVariables = Object.values(webState.variables).reduce(
+      (acc, variable) => {
+        acc[variable.key] = variable.effectiveValue;
+        return acc;
+      },
+      {} as Record<string, string>,
+    );
+
+    const variables = Object.fromEntries(
+      Object.entries(webState.variables).map(([key, variable]) => {
+        const model = envVariables.find((item) => item.name === key);
+
+        return [
+          key,
+          {
+            key,
+            value: variable.effectiveValue,
+            source: variable.effectiveSource,
+            isOverridden: variable.isOverridden,
+            overrideChain:
+              variable.definitions.length > 1
+                ? variable.definitions.map((definition) => ({
+                    source: definition.source,
+                    value: definition.value,
+                  }))
+                : undefined,
+            validation: {
+              valid: variable.validation.success,
+              errors: variable.validation.error.issues,
+            },
+            dependencies: model?.contextualValidation?.dependencies.map(
+              (dep) => {
+                const dependencyValue = allVariables[dep.variable] ?? '';
+                const satisfied = dep.condition(dependencyValue, allVariables);
+
+                return {
+                  variable: dep.variable,
+                  condition: dep.message,
+                  satisfied,
+                };
+              },
+            ),
+          },
+        ];
+      }),
+    );
+
+    return {
+      mode,
+      variables,
+    };
+  }
+
+  async update(input: {
+    key?: string;
+    value?: string;
+    file?: string;
+    mode?: EnvMode;
+  }) {
+    if (!input.key || typeof input.value !== 'string') {
+      throw new Error('Both key and value are required for kit_env_update');
+    }
+
+    const fileName =
+      input.file ??
+      this.resolveDefaultFile(input.key, input.mode ?? 'development');
+    const targetPath = this.resolveWebFile(fileName);
+
+    let content = '';
+
+    if (await this.deps.fileExists(targetPath)) {
+      content = await this.deps.readFile(targetPath);
+    }
+
+    const lines = content.length > 0 ? content.split('\n') : [];
+
+    let replaced = false;
+    const updatedLines = lines.map((line) => {
+      if (line.startsWith(`${input.key}=`)) {
+        replaced = true;
+        return `${input.key}=${input.value}`;
+      }
+
+      return line;
+    });
+
+    if (!replaced) {
+      if (
+        updatedLines.length > 0 &&
+        updatedLines[updatedLines.length - 1] !== ''
+      ) {
+        updatedLines.push('');
+      }
+
+      updatedLines.push(`${input.key}=${input.value}`);
+    }
+
+    await this.deps.writeFile(targetPath, updatedLines.join('\n'));
+
+    return {
+      success: true,
+      message: `Updated ${input.key} in ${fileName}`,
+    };
+  }
+
+  async rawRead(file: string) {
+    const targetPath = this.resolveWebFile(file);
+
+    if (!(await this.deps.fileExists(targetPath))) {
+      return {
+        content: '',
+        exists: false,
+      };
+    }
+
+    return {
+      content: await this.deps.readFile(targetPath),
+      exists: true,
+    };
+  }
+
+  async rawWrite(file: string, content: string) {
+    const targetPath = this.resolveWebFile(file);
+    await this.deps.writeFile(targetPath, content);
+
+    return {
+      success: true,
+      message: `Saved ${file}`,
+    };
+  }
+
+  async getVariable(key: string, mode: EnvMode) {
+    const result = await this.read(mode);
+    return result.variables[key]?.value ?? '';
+  }
+
+  async getAppState(mode: EnvMode) {
+    const scanFs = this.getScanFs();
+    const states = await getEnvState({
+      mode,
+      apps: ['web'],
+      rootDir: this.deps.rootPath,
+      fs: scanFs,
+    });
+
+    return states;
+  }
+
+  private resolveDefaultFile(key: string, mode: EnvMode) {
+    const model = envVariables.find((item) => item.name === key);
+    const isSecret = model?.secret ?? true;
+
+    if (mode === 'production') {
+      return isSecret ? '.env.production.local' : '.env.production';
+    }
+
+    return isSecret ? '.env.local' : '.env.development';
+  }
+
+  private resolveWebFile(fileName: string) {
+    const webDir = path.resolve(this.deps.rootPath, 'apps', 'web');
+    const resolved = path.resolve(webDir, fileName);
+
+    // Prevent path traversal outside the web app directory
+    if (!resolved.startsWith(webDir + path.sep) && resolved !== webDir) {
+      throw new Error(
+        `Invalid file path: "${fileName}" resolves outside the web app directory`,
+      );
+    }
+
+    return resolved;
+  }
+
+  private getScanFs(): ScanFs | undefined {
+    if (!this.deps.readdir || !this.deps.stat) {
+      return undefined;
+    }
+
+    return {
+      readFile: (filePath) => this.deps.readFile(filePath),
+      readdir: (dirPath) => this.deps.readdir!(dirPath),
+      stat: (path) => this.deps.stat!(path),
+    };
+  }
+}
+
+function mapType(
+  type?: string,
+): 'string' | 'url' | 'email' | 'number' | 'boolean' | 'enum' {
+  if (
+    type === 'url' ||
+    type === 'email' ||
+    type === 'number' ||
+    type === 'boolean' ||
+    type === 'enum'
+  ) {
+    return type;
+  }
+
+  return 'string';
+}
+
+export function createKitEnvDeps(rootPath = process.cwd()): KitEnvDeps {
+  return {
+    rootPath,
+    readFile(filePath: string) {
+      return fs.readFile(filePath, 'utf8');
+    },
+    writeFile(filePath: string, content: string) {
+      return fs.writeFile(filePath, content, 'utf8');
+    },
+    readdir(dirPath: string) {
+      return fs.readdir(dirPath);
+    },
+    stat(path: string) {
+      return fs.stat(path);
+    },
+    async fileExists(filePath: string) {
+      try {
+        await fs.access(filePath);
+        return true;
+      } catch {
+        return false;
+      }
+    },
+  };
+}

packages/mcp-server/src/tools/env/public-api.ts

@@ -0,0 +1,9 @@
+export { envVariables } from './model';
+export {
+  findWorkspaceRoot,
+  getEnvState,
+  getVariable,
+  processEnvDefinitions,
+  scanMonorepoEnv,
+} from './scanner';
+export { createKitEnvDeps, createKitEnvService } from './kit-env.service';

packages/mcp-server/src/tools/env/scanner.ts

@@ -0,0 +1,480 @@
+import fs from 'fs/promises';
+import { existsSync } from 'node:fs';
+import path from 'path';
+
+import { envVariables } from './model';
+import {
+  AppEnvState,
+  EnvFileInfo,
+  EnvMode,
+  EnvVariableState,
+  ScanFs,
+  ScanOptions,
+} from './types';
+
+// Define precedence order for each mode
+const ENV_FILE_PRECEDENCE: Record<EnvMode, string[]> = {
+  development: [
+    '.env',
+    '.env.development',
+    '.env.local',
+    '.env.development.local',
+  ],
+  production: [
+    '.env',
+    '.env.production',
+    '.env.local',
+    '.env.production.local',
+  ],
+};
+
+function getSourcePrecedence(source: string, mode: EnvMode): number {
+  return ENV_FILE_PRECEDENCE[mode].indexOf(source);
+}
+
+export async function scanMonorepoEnv(
+  options: ScanOptions,
+): Promise<EnvFileInfo[]> {
+  const {
+    rootDir = findWorkspaceRoot(process.cwd()),
+    apps = ['web'],
+    mode,
+  } = options;
+
+  const defaultFs: ScanFs = {
+    readFile: (filePath) => fs.readFile(filePath, 'utf-8'),
+    readdir: (dirPath) => fs.readdir(dirPath),
+    stat: (path) => fs.stat(path),
+  };
+  const fsApi = options.fs ?? defaultFs;
+
+  const envTypes = ENV_FILE_PRECEDENCE[mode];
+  const appsDir = path.join(rootDir, 'apps');
+  const results: EnvFileInfo[] = [];
+
+  try {
+    const appDirs = await fsApi.readdir(appsDir);
+
+    for (const appName of appDirs) {
+      if (apps.length > 0 && !apps.includes(appName)) {
+        continue;
+      }
+
+      const appDir = path.join(appsDir, appName);
+      const stat = await fsApi.stat(appDir);
+
+      if (!stat.isDirectory()) {
+        continue;
+      }
+
+      const appInfo: EnvFileInfo = {
+        appName,
+        filePath: appDir,
+        variables: [],
+      };
+
+      for (const envType of envTypes) {
+        const envPath = path.join(appDir, envType);
+
+        try {
+          const content = await fsApi.readFile(envPath);
+          const vars = parseEnvFile(content, envType);
+
+          appInfo.variables.push(...vars);
+        } catch (error) {
+          if ((error as NodeJS.ErrnoException).code !== 'ENOENT') {
+            console.warn(`Error reading ${envPath}:`, error);
+          }
+        }
+      }
+
+      results.push(appInfo);
+    }
+  } catch (error) {
+    console.error('Error scanning monorepo:', error);
+    throw error;
+  }
+
+  return results;
+}
+
+function parseEnvFile(content: string, source: string) {
+  const variables: Array<{ key: string; value: string; source: string }> = [];
+
+  const lines = content.split('\n');
+
+  for (const line of lines) {
+    // Skip comments and empty lines
+    if (line.trim().startsWith('#') || !line.trim()) {
+      continue;
+    }
+
+    // Match KEY=VALUE pattern, handling quotes
+    const match = line.match(/^([^=]+)=(.*)$/);
+    if (match) {
+      const [, key = '', rawValue] = match;
+      let value = rawValue ?? '';
+
+      // Remove quotes if present
+      if (
+        (value.startsWith('"') && value.endsWith('"')) ||
+        (value.startsWith("'") && value.endsWith("'"))
+      ) {
+        value = value.slice(1, -1);
+      }
+
+      // Handle escaped quotes within the value
+      value = value
+        .replace(/\\"/g, '"')
+        .replace(/\\'/g, "'")
+        .replace(/\\\\/g, '\\');
+
+      variables.push({
+        key: key.trim(),
+        value: value.trim(),
+        source,
+      });
+    }
+  }
+
+  return variables;
+}
+
+export function processEnvDefinitions(
+  envInfo: EnvFileInfo,
+  mode: EnvMode,
+): AppEnvState {
+  const variableMap: Record<string, EnvVariableState> = {};
+
+  // First pass: Collect all definitions
+  for (const variable of envInfo.variables) {
+    if (!variable) {
+      continue;
+    }
+
+    const model = envVariables.find((v) => variable.key === v.name);
+
+    if (!variableMap[variable.key]) {
+      variableMap[variable.key] = {
+        key: variable.key,
+        isVisible: true,
+        definitions: [],
+        effectiveValue: variable.value,
+        effectiveSource: variable.source,
+        isOverridden: false,
+        category: model ? model.category : 'Custom',
+        validation: {
+          success: true,
+          error: {
+            issues: [],
+          },
+        },
+      };
+    }
+
+    const varState = variableMap[variable.key];
+
+    if (!varState) {
+      continue;
+    }
+
+    varState.definitions.push({
+      key: variable.key,
+      value: variable.value,
+      source: variable.source,
+    });
+  }
+
+  // Second pass: Determine effective values and override status
+  for (const key in variableMap) {
+    const varState = variableMap[key];
+
+    if (!varState) {
+      continue;
+    }
+
+    // Sort definitions by mode-specific precedence
+    varState.definitions.sort(
+      (a, b) =>
+        getSourcePrecedence(a.source, mode) -
+        getSourcePrecedence(b.source, mode),
+    );
+
+    if (varState.definitions.length > 1) {
+      const lastDef = varState.definitions[varState.definitions.length - 1];
+
+      if (!lastDef) {
+        continue;
+      }
+
+      const highestPrecedence = getSourcePrecedence(lastDef.source, mode);
+
+      varState.isOverridden = true;
+      varState.effectiveValue = lastDef.value;
+      varState.effectiveSource = lastDef.source;
+
+      // Check for conflicts at highest precedence
+      const conflictingDefs = varState.definitions.filter(
+        (def) => getSourcePrecedence(def.source, mode) === highestPrecedence,
+      );
+
+      if (conflictingDefs.length > 1) {
+        varState.effectiveSource = `${varState.effectiveSource} (conflict)`;
+      }
+    }
+  }
+
+  // Build a lookup of all effective values once (used by validations below)
+  const allVariables: Record<string, string> = {};
+
+  for (const key in variableMap) {
+    const varState = variableMap[key];
+    if (varState) {
+      allVariables[varState.key] = varState.effectiveValue;
+    }
+  }
+
+  // after computing the effective values, we can check for errors
+  for (const key in variableMap) {
+    const model = envVariables.find((v) => key === v.name);
+    const varState = variableMap[key];
+
+    if (!varState) {
+      continue;
+    }
+
+    let validation: {
+      success: boolean;
+      error: {
+        issues: string[];
+      };
+    } = { success: true, error: { issues: [] } };
+
+    if (model) {
+      // First check if it's required but missing (use pre-computed allVariables)
+      if (model.required && !varState.effectiveValue) {
+        validation = {
+          success: false,
+          error: {
+            issues: [
+              `This variable is required but missing from your environment files`,
+            ],
+          },
+        };
+      } else if (model.contextualValidation) {
+        // Then check contextual validation
+        const dependenciesMet = model.contextualValidation.dependencies.some(
+          (dep) => {
+            const dependencyValue = allVariables[dep.variable] ?? '';
+
+            return dep.condition(dependencyValue, allVariables);
+          },
+        );
+
+        if (dependenciesMet) {
+          // Only check for missing value or run validation if dependencies are met
+          if (!varState.effectiveValue) {
+            const dependencyErrors = model.contextualValidation.dependencies
+              .map((dep) => {
+                const dependencyValue = allVariables[dep.variable] ?? '';
+
+                const shouldValidate = dep.condition(
+                  dependencyValue,
+                  allVariables,
+                );
+
+                if (shouldValidate) {
+                  const { success } = model.contextualValidation!.validate({
+                    value: varState.effectiveValue,
+                    variables: allVariables,
+                    mode,
+                  });
+
+                  if (success) {
+                    return null;
+                  }
+
+                  return dep.message;
+                }
+
+                return null;
+              })
+              .filter((message): message is string => message !== null);
+
+            validation = {
+              success: dependencyErrors.length === 0,
+              error: {
+                issues: dependencyErrors
+                  .map((message) => message)
+                  .filter((message) => !!message),
+              },
+            };
+          } else {
+            // If we have a value and dependencies are met, run contextual validation
+            const result = model.contextualValidation.validate({
+              value: varState.effectiveValue,
+              variables: allVariables,
+              mode,
+            });
+
+            if (!result.success) {
+              validation = {
+                success: false,
+                error: {
+                  issues: result.error.issues
+                    .map((issue) => issue.message)
+                    .filter((message) => !!message),
+                },
+              };
+            }
+          }
+        }
+      } else if (model.validate && varState.effectiveValue) {
+        // Only run regular validation if:
+        // 1. There's no contextual validation
+        // 2. There's a value to validate
+        const result = model.validate({
+          value: varState.effectiveValue,
+          variables: allVariables,
+          mode,
+        });
+
+        if (!result.success) {
+          validation = {
+            success: false,
+            error: {
+              issues: result.error.issues
+                .map((issue) => issue.message)
+                .filter((message) => !!message),
+            },
+          };
+        }
+      }
+    }
+
+    varState.validation = validation;
+  }
+
+  // Final pass: Validate missing variables that are marked as required
+  // or as having contextual validation
+  for (const model of envVariables) {
+    // If the variable exists in appState, use that
+    const existingVar = variableMap[model.name];
+
+    if (existingVar) {
+      // If the variable is already in the map, skip it
+      continue;
+    }
+
+    if (model.contextualValidation) {
+      // Check if any dependency condition is met for this missing variable
+      const errors = model.contextualValidation.dependencies.flatMap((dep) => {
+        const dependencyValue = allVariables[dep.variable] ?? '';
+        const shouldValidate = dep.condition(dependencyValue, allVariables);
+
+        if (!shouldValidate) {
+          return [];
+        }
+
+        // Validate with the missing variable's empty value
+        const validation = model.contextualValidation!.validate({
+          value: '',
+          variables: allVariables,
+          mode,
+        });
+
+        if (!validation.success) {
+          return [dep.message];
+        }
+
+        return [];
+      });
+
+      if (errors.length === 0) {
+        continue;
+      }
+
+      variableMap[model.name] = {
+        key: model.name,
+        effectiveValue: '',
+        effectiveSource: 'MISSING',
+        isVisible: true,
+        category: model.category,
+        isOverridden: false,
+        definitions: [],
+        validation: {
+          success: false,
+          error: {
+            issues: errors,
+          },
+        },
+      };
+    } else if (model.required) {
+      // Required but no contextual validation — generic required error
+      variableMap[model.name] = {
+        key: model.name,
+        effectiveValue: '',
+        effectiveSource: 'MISSING',
+        isVisible: true,
+        category: model.category,
+        isOverridden: false,
+        definitions: [],
+        validation: {
+          success: false,
+          error: {
+            issues: [
+              `This variable is required but missing from your environment files`,
+            ],
+          },
+        },
+      };
+    }
+  }
+
+  return {
+    appName: envInfo.appName,
+    filePath: envInfo.filePath,
+    mode,
+    variables: variableMap,
+  };
+}
+
+export async function getEnvState(
+  options: ScanOptions,
+): Promise<AppEnvState[]> {
+  const envInfos = await scanMonorepoEnv(options);
+  return envInfos.map((info) => processEnvDefinitions(info, options.mode));
+}
+
+export async function getVariable(key: string, mode: EnvMode) {
+  // Get the processed environment state for all apps (you can limit to 'web' via options)
+  const envStates = await getEnvState({ mode, apps: ['web'] });
+
+  // Find the state for the "web" app.
+  const webState = envStates.find((state) => state.appName === 'web');
+
+  // Return the effectiveValue based on override status.
+  return webState?.variables[key]?.effectiveValue ?? '';
+}
+
+export function findWorkspaceRoot(startPath: string) {
+  let current = startPath;
+
+  for (let depth = 0; depth < 6; depth++) {
+    const maybeWorkspace = path.join(current, 'pnpm-workspace.yaml');
+
+    if (existsSync(maybeWorkspace)) {
+      return current;
+    }
+
+    const parent = path.join(current, '..');
+
+    if (parent === current) {
+      break;
+    }
+
+    current = parent;
+  }
+
+  return startPath;
+}

packages/mcp-server/src/tools/env/schema.ts

@@ -0,0 +1,102 @@
+import { z } from 'zod/v3';
+
+export const KitEnvModeSchema = z.enum(['development', 'production']);
+
+export const KitEnvSchemaInputSchema = z.object({});
+
+export const KitEnvReadInputSchema = z.object({
+  mode: KitEnvModeSchema.default('development'),
+});
+
+export const KitEnvUpdateInputSchema = z.object({
+  key: z.string().min(1),
+  value: z.string(),
+  mode: KitEnvModeSchema.optional(),
+  file: z.string().optional(),
+});
+
+export const KitEnvRawReadInputSchema = z.object({
+  file: z.string().min(1),
+});
+
+export const KitEnvRawWriteInputSchema = z.object({
+  file: z.string().min(1),
+  content: z.string(),
+});
+
+export const KitEnvSchemaOutputSchema = z.object({
+  groups: z.array(
+    z.object({
+      name: z.string(),
+      description: z.string(),
+      variables: z.array(
+        z.object({
+          key: z.string(),
+          label: z.string(),
+          description: z.string(),
+          required: z.boolean(),
+          type: z.enum(['string', 'url', 'email', 'number', 'boolean', 'enum']),
+          sensitive: z.boolean(),
+          values: z.array(z.string()).optional(),
+          hint: z.string().optional(),
+          dependencies: z
+            .array(
+              z.object({
+                variable: z.string(),
+                condition: z.string(),
+              }),
+            )
+            .optional(),
+        }),
+      ),
+    }),
+  ),
+});
+
+export const KitEnvReadOutputSchema = z.object({
+  mode: KitEnvModeSchema,
+  variables: z.record(
+    z.object({
+      key: z.string(),
+      value: z.string(),
+      source: z.string(),
+      isOverridden: z.boolean(),
+      overrideChain: z
+        .array(
+          z.object({
+            source: z.string(),
+            value: z.string(),
+          }),
+        )
+        .optional(),
+      validation: z.object({
+        valid: z.boolean(),
+        errors: z.array(z.string()),
+      }),
+      dependencies: z
+        .array(
+          z.object({
+            variable: z.string(),
+            condition: z.string(),
+            satisfied: z.boolean(),
+          }),
+        )
+        .optional(),
+    }),
+  ),
+});
+
+export const KitEnvUpdateOutputSchema = z.object({
+  success: z.boolean(),
+  message: z.string(),
+});
+
+export const KitEnvRawReadOutputSchema = z.object({
+  content: z.string(),
+  exists: z.boolean(),
+});
+
+export const KitEnvRawWriteOutputSchema = z.object({
+  success: z.boolean(),
+  message: z.string(),
+});

packages/mcp-server/src/tools/env/types.ts

@@ -0,0 +1,54 @@
+export type EnvMode = 'development' | 'production';
+
+export type ScanFs = {
+  readFile: (filePath: string) => Promise<string>;
+  readdir: (dirPath: string) => Promise<string[]>;
+  stat: (path: string) => Promise<{ isDirectory(): boolean }>;
+};
+
+export type ScanOptions = {
+  apps?: string[];
+  rootDir?: string;
+  mode: EnvMode;
+  fs?: ScanFs;
+};
+
+export type EnvDefinition = {
+  key: string;
+  value: string;
+  source: string;
+};
+
+export type EnvVariableState = {
+  key: string;
+  category: string;
+  definitions: EnvDefinition[];
+  effectiveValue: string;
+  isOverridden: boolean;
+  effectiveSource: string;
+  isVisible: boolean;
+  validation: {
+    success: boolean;
+    error: {
+      issues: string[];
+    };
+  };
+};
+
+export type AppEnvState = {
+  appName: string;
+  filePath: string;
+  mode: EnvMode;
+  variables: Record<string, EnvVariableState>;
+};
+
+export type EnvFileInfo = {
+  appName: string;
+  filePath: string;
+
+  variables: Array<{
+    key: string;
+    value: string;
+    source: string;
+  }>;
+};

packages/mcp-server/src/tools/mailbox/__tests__/kit-mailbox.service.test.ts

@@ -0,0 +1,190 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  type KitMailboxDeps,
+  createKitMailboxService,
+} from '../kit-mailbox.service';
+
+function createDeps(overrides: Partial<KitMailboxDeps> = {}): KitMailboxDeps {
+  return {
+    async executeCommand() {
+      return {
+        stdout: '',
+        stderr: '',
+        exitCode: 0,
+      };
+    },
+    async isPortOpen() {
+      return true;
+    },
+    async fetchJson() {
+      return {};
+    },
+    async requestJson() {
+      return {};
+    },
+    ...overrides,
+  };
+}
+
+describe('KitMailboxService', () => {
+  it('lists messages from Mailpit API', async () => {
+    const service = createKitMailboxService(
+      createDeps({
+        async executeCommand() {
+          return { stdout: 'mailpit\n', stderr: '', exitCode: 0 };
+        },
+        async fetchJson(url: string) {
+          if (url.endsWith('/info')) {
+            return { version: 'v1' };
+          }
+
+          return {
+            total: 1,
+            unread: 1,
+            count: 1,
+            messages: [
+              {
+                ID: 'abc',
+                MessageID: 'm-1',
+                Subject: 'Welcome',
+                From: [{ Name: 'Makerkit', Address: 'noreply@makerkit.dev' }],
+                To: [{ Address: 'user@example.com' }],
+                Created: '2025-01-01T00:00:00Z',
+                Size: 123,
+                Read: false,
+                ReadAt: null,
+              },
+            ],
+          };
+        },
+      }),
+    );
+
+    const result = await service.list({ start: 0, limit: 50 });
+
+    expect(result.mail_server.running).toBe(true);
+    expect(result.mail_server.running_via_docker).toBe(true);
+    expect(result.total).toBe(1);
+    expect(result.messages[0]).toEqual({
+      id: 'abc',
+      message_id: 'm-1',
+      subject: 'Welcome',
+      from: ['Makerkit <noreply@makerkit.dev>'],
+      to: ['user@example.com'],
+      created_at: '2025-01-01T00:00:00Z',
+      size: 123,
+      read: false,
+    });
+    expect(result.messages[0]?.readAt).toBeUndefined();
+  });
+
+  it('reads single message details', async () => {
+    const service = createKitMailboxService(
+      createDeps({
+        async executeCommand() {
+          return { stdout: '', stderr: '', exitCode: 0 };
+        },
+        async fetchJson(url: string) {
+          if (url.endsWith('/info')) {
+            return { version: 'v1' };
+          }
+
+          if (url.includes('/message/')) {
+            return {
+              ID: 'abc',
+              MessageID: 'm-1',
+              Subject: 'Welcome',
+              From: [{ Address: 'noreply@makerkit.dev' }],
+              To: [{ Address: 'user@example.com' }],
+              Cc: [{ Address: 'team@example.com' }],
+              Bcc: [],
+              Text: ['Hello user'],
+              HTML: ['<p>Hello user</p>'],
+              Headers: {
+                Subject: ['Welcome'],
+              },
+              Read: true,
+              ReadAt: '2025-01-01T00:05:00Z',
+              Size: 456,
+              Created: '2025-01-01T00:00:00Z',
+            };
+          }
+
+          return {};
+        },
+      }),
+    );
+
+    const result = await service.read({ id: 'abc' });
+
+    expect(result.id).toBe('abc');
+    expect(result.subject).toBe('Welcome');
+    expect(result.from).toEqual(['noreply@makerkit.dev']);
+    expect(result.to).toEqual(['user@example.com']);
+    expect(result.cc).toEqual(['team@example.com']);
+    expect(result.text).toBe('Hello user');
+    expect(result.html).toBe('<p>Hello user</p>');
+    expect(result.read).toBe(true);
+    expect(result.readAt).toBe('2025-01-01T00:05:00Z');
+    expect(result.headers).toEqual({ Subject: ['Welcome'] });
+  });
+
+  it('updates read status for a message', async () => {
+    const service = createKitMailboxService(
+      createDeps({
+        async requestJson(url: string) {
+          expect(url).toContain('/message/abc/read');
+
+          return {
+            id: 'abc',
+            read: true,
+            readAt: '2025-01-01T00:10:00Z',
+          };
+        },
+      }),
+    );
+
+    const result = await service.setReadStatus({ id: 'abc', read: true });
+
+    expect(result).toEqual({
+      id: 'abc',
+      read: true,
+      readAt: '2025-01-01T00:10:00Z',
+    });
+  });
+
+  it('throws if mailpit runs in docker but API port is not open', async () => {
+    const service = createKitMailboxService(
+      createDeps({
+        async isPortOpen() {
+          return false;
+        },
+        async executeCommand() {
+          return { stdout: 'mailpit\n', stderr: '', exitCode: 0 };
+        },
+      }),
+    );
+
+    await expect(service.list({ start: 0, limit: 50 })).rejects.toThrow(
+      'Mailpit appears running in docker but API is unreachable at http://127.0.0.1:8025',
+    );
+  });
+
+  it('throws if mailpit is not running', async () => {
+    const service = createKitMailboxService(
+      createDeps({
+        async isPortOpen() {
+          return false;
+        },
+        async executeCommand() {
+          return { stdout: '', stderr: '', exitCode: 0 };
+        },
+      }),
+    );
+
+    await expect(service.list({ start: 0, limit: 50 })).rejects.toThrow(
+      'Mailpit is not running. Start local services with "pnpm compose:dev:up".',
+    );
+  });
+});

packages/mcp-server/src/tools/mailbox/index.ts

@@ -0,0 +1,194 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { execFile } from 'node:child_process';
+import { Socket } from 'node:net';
+import { promisify } from 'node:util';
+
+import {
+  type KitMailboxDeps,
+  createKitMailboxService,
+} from './kit-mailbox.service';
+import {
+  KitEmailsListInputSchema,
+  KitEmailsListOutputSchema,
+  KitEmailsReadInputSchema,
+  KitEmailsReadOutputSchema,
+  KitEmailsSetReadStatusInputSchema,
+  KitEmailsSetReadStatusOutputSchema,
+} from './schema';
+
+const execFileAsync = promisify(execFile);
+
+type TextContent = {
+  type: 'text';
+  text: string;
+};
+
+export function registerKitEmailsTools(server: McpServer) {
+  const service = createKitMailboxService(createKitMailboxDeps());
+
+  server.registerTool(
+    'kit_emails_list',
+    {
+      description:
+        'List received emails from the local Mailpit inbox (runtime mailbox, not source templates)',
+      inputSchema: KitEmailsListInputSchema,
+      outputSchema: KitEmailsListOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitEmailsListInputSchema.parse(input);
+        const result = await service.list(parsed);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_emails_list', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_emails_read',
+    {
+      description:
+        'Read a received email from the local Mailpit inbox by message id (includes text/html/headers)',
+      inputSchema: KitEmailsReadInputSchema,
+      outputSchema: KitEmailsReadOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitEmailsReadInputSchema.parse(input);
+        const result = await service.read(parsed);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_emails_read', error);
+      }
+    },
+  );
+
+  server.registerTool(
+    'kit_emails_set_read_status',
+    {
+      description:
+        'Set read/unread status for a received email in the local Mailpit inbox',
+      inputSchema: KitEmailsSetReadStatusInputSchema,
+      outputSchema: KitEmailsSetReadStatusOutputSchema,
+    },
+    async (input) => {
+      try {
+        const parsed = KitEmailsSetReadStatusInputSchema.parse(input);
+        const result = await service.setReadStatus(parsed);
+
+        return {
+          structuredContent: result,
+          content: buildTextContent(JSON.stringify(result)),
+        };
+      } catch (error) {
+        return buildErrorResponse('kit_emails_set_read_status', error);
+      }
+    },
+  );
+}
+
+export function createKitMailboxDeps(rootPath = process.cwd()): KitMailboxDeps {
+  return {
+    async executeCommand(command: string, args: string[]) {
+      const result = await execFileAsync(command, args, { cwd: rootPath });
+
+      return {
+        stdout: result.stdout,
+        stderr: result.stderr,
+        exitCode: 0,
+      };
+    },
+    async isPortOpen(port: number) {
+      return checkPort(port);
+    },
+    async fetchJson(url: string) {
+      const response = await fetch(url);
+
+      if (!response.ok) {
+        throw new Error(
+          `Mailpit API request failed with status ${response.status}`,
+        );
+      }
+
+      return response.json();
+    },
+    async requestJson(url: string, init) {
+      const response = await fetch(url, {
+        method: init?.method ?? 'GET',
+        headers: init?.headers,
+        body: init?.body,
+      });
+
+      if (!response.ok) {
+        throw new Error(
+          `Mailpit API request failed with status ${response.status}`,
+        );
+      }
+
+      return response.json();
+    },
+  };
+}
+
+async function checkPort(port: number) {
+  return new Promise<boolean>((resolve) => {
+    const socket = new Socket();
+
+    socket.setTimeout(200);
+
+    socket.once('connect', () => {
+      socket.destroy();
+      resolve(true);
+    });
+
+    socket.once('timeout', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.once('error', () => {
+      socket.destroy();
+      resolve(false);
+    });
+
+    socket.connect(port, '127.0.0.1');
+  });
+}
+
+function buildErrorResponse(tool: string, error: unknown) {
+  const message = `${tool} failed: ${toErrorMessage(error)}`;
+
+  return {
+    isError: true,
+    content: buildTextContent(message),
+  };
+}
+
+function toErrorMessage(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+
+  return 'Unknown error';
+}
+
+function buildTextContent(text: string): TextContent[] {
+  return [{ type: 'text', text }];
+}
+
+export { createKitMailboxService } from './kit-mailbox.service';
+export type { KitMailboxDeps } from './kit-mailbox.service';
+export type {
+  KitEmailsListOutput,
+  KitEmailsReadOutput,
+  KitEmailsSetReadStatusOutput,
+} from './schema';

packages/mcp-server/src/tools/mailbox/kit-mailbox.service.ts

@@ -0,0 +1,261 @@
+import type {
+  KitEmailsListInput,
+  KitEmailsListOutput,
+  KitEmailsReadInput,
+  KitEmailsReadOutput,
+  KitEmailsSetReadStatusInput,
+  KitEmailsSetReadStatusOutput,
+} from './schema';
+
+interface CommandResult {
+  stdout: string;
+  stderr: string;
+  exitCode: number;
+}
+
+export interface KitMailboxDeps {
+  executeCommand(command: string, args: string[]): Promise<CommandResult>;
+  isPortOpen(port: number): Promise<boolean>;
+  fetchJson(url: string): Promise<unknown>;
+  requestJson(
+    url: string,
+    init?: {
+      method?: string;
+      body?: string;
+      headers?: Record<string, string>;
+    },
+  ): Promise<unknown>;
+}
+
+interface MailServerStatus {
+  running: boolean;
+  running_via_docker: boolean;
+  api_base_url: string;
+}
+
+const MAILPIT_HTTP_PORT = 54324;
+const MAILPIT_API_BASE_URL = 'http://127.0.0.1:54324/api/v1';
+
+export function createKitMailboxService(deps: KitMailboxDeps) {
+  return new KitMailboxService(deps);
+}
+
+export class KitMailboxService {
+  constructor(private readonly deps: KitMailboxDeps) {}
+
+  async list(input: KitEmailsListInput): Promise<KitEmailsListOutput> {
+    const mailServer = await this.ensureMailServerReady();
+
+    const payload = asRecord(
+      await this.deps.fetchJson(
+        `${MAILPIT_API_BASE_URL}/messages?start=${input.start}&limit=${input.limit}`,
+      ),
+    );
+
+    const messages = asArray(payload.messages ?? payload.Messages).map(
+      (message) => this.toSummary(asRecord(message)),
+    );
+
+    return {
+      mail_server: mailServer,
+      start: toNumber(payload.start ?? payload.Start) ?? input.start,
+      limit: toNumber(payload.limit ?? payload.Limit) ?? input.limit,
+      count: toNumber(payload.count ?? payload.Count) ?? messages.length,
+      total: toNumber(payload.total ?? payload.Total) ?? messages.length,
+      unread: toNumber(payload.unread ?? payload.Unread),
+      messages,
+    };
+  }
+
+  async read(input: KitEmailsReadInput): Promise<KitEmailsReadOutput> {
+    const mailServer = await this.ensureMailServerReady();
+
+    const message = asRecord(
+      await this.deps.fetchJson(
+        `${MAILPIT_API_BASE_URL}/message/${encodeURIComponent(input.id)}`,
+      ),
+    );
+
+    return {
+      mail_server: mailServer,
+      id: toString(message.ID ?? message.id) ?? input.id,
+      message_id: toString(message.MessageID ?? message.messageId),
+      subject: toString(message.Subject ?? message.subject),
+      from: readAddressList(message.From ?? message.from),
+      to: readAddressList(message.To ?? message.to),
+      cc: readAddressList(message.Cc ?? message.cc),
+      bcc: readAddressList(message.Bcc ?? message.bcc),
+      created_at: toString(message.Created ?? message.created),
+      size: toNumber(message.Size ?? message.size),
+      read: toBoolean(message.Read ?? message.read) ?? false,
+      readAt: toString(message.ReadAt ?? message.readAt),
+      text: readBody(message.Text ?? message.text),
+      html: readBody(message.HTML ?? message.Html ?? message.html),
+      headers: readHeaders(message.Headers ?? message.headers),
+      raw: message,
+    };
+  }
+
+  async setReadStatus(
+    input: KitEmailsSetReadStatusInput,
+  ): Promise<KitEmailsSetReadStatusOutput> {
+    await this.ensureMailServerReady();
+
+    const response = asRecord(
+      await this.deps.requestJson(
+        `${MAILPIT_API_BASE_URL}/message/${encodeURIComponent(input.id)}/read`,
+        {
+          method: 'PUT',
+          headers: {
+            'content-type': 'application/json',
+          },
+          body: JSON.stringify({ read: input.read }),
+        },
+      ),
+    );
+
+    const read = toBoolean(response.Read ?? response.read) ?? input.read;
+    const readAt = toString(response.ReadAt ?? response.readAt);
+
+    return {
+      id: toString(response.ID ?? response.id) ?? input.id,
+      read,
+      ...(readAt ? { readAt } : {}),
+    };
+  }
+
+  private toSummary(message: Record<string, unknown>) {
+    const readAt = toString(message.ReadAt ?? message.readAt);
+
+    return {
+      id: toString(message.ID ?? message.id) ?? '',
+      message_id: toString(message.MessageID ?? message.messageId),
+      subject: toString(message.Subject ?? message.subject),
+      from: readAddressList(message.From ?? message.from),
+      to: readAddressList(message.To ?? message.to),
+      created_at: toString(message.Created ?? message.created),
+      size: toNumber(message.Size ?? message.size),
+      read: toBoolean(message.Read ?? message.read) ?? false,
+      ...(readAt ? { readAt } : {}),
+    };
+  }
+
+  private async ensureMailServerReady(): Promise<MailServerStatus> {
+    const running = await this.deps.isPortOpen(MAILPIT_HTTP_PORT);
+    const runningViaDocker = await this.isMailpitRunningViaDocker();
+
+    if (!running) {
+      if (runningViaDocker) {
+        throw new Error(
+          'Mailpit appears running in docker but API is unreachable at http://127.0.0.1:8025',
+        );
+      }
+
+      throw new Error(
+        'Mailpit is not running. Start local services with "pnpm compose:dev:up".',
+      );
+    }
+
+    await this.deps.fetchJson(`${MAILPIT_API_BASE_URL}/info`);
+
+    return {
+      running,
+      running_via_docker: runningViaDocker,
+      api_base_url: MAILPIT_API_BASE_URL,
+    };
+  }
+
+  private async isMailpitRunningViaDocker() {
+    try {
+      const result = await this.deps.executeCommand('docker', [
+        'compose',
+        '-f',
+        'docker-compose.dev.yml',
+        'ps',
+        '--status',
+        'running',
+        '--services',
+      ]);
+
+      const services = result.stdout
+        .split('\n')
+        .map((line) => line.trim())
+        .filter(Boolean);
+
+      return services.includes('mailpit');
+    } catch {
+      return false;
+    }
+  }
+}
+
+function readHeaders(input: unknown) {
+  const headers = asRecord(input);
+  const normalized: Record<string, string[]> = {};
+
+  for (const [key, value] of Object.entries(headers)) {
+    normalized[key] = asArray(value)
+      .map((item) => toString(item))
+      .filter((item): item is string => item !== null);
+  }
+
+  return normalized;
+}
+
+function readBody(input: unknown): string | null {
+  if (typeof input === 'string') {
+    return input;
+  }
+
+  if (Array.isArray(input)) {
+    const chunks = input
+      .map((item) => toString(item))
+      .filter((item): item is string => item !== null);
+
+    return chunks.length > 0 ? chunks.join('\n\n') : null;
+  }
+
+  return null;
+}
+
+function readAddressList(input: unknown): string[] {
+  return asArray(input)
+    .map((entry) => {
+      const item = asRecord(entry);
+      const address =
+        toString(item.Address ?? item.address ?? item.Email ?? item.email) ??
+        '';
+      const name = toString(item.Name ?? item.name);
+
+      if (!address) {
+        return null;
+      }
+
+      return name ? `${name} <${address}>` : address;
+    })
+    .filter((value): value is string => value !== null);
+}
+
+function asRecord(value: unknown): Record<string, unknown> {
+  if (!value || typeof value !== 'object' || Array.isArray(value)) {
+    return {};
+  }
+
+  return value as Record<string, unknown>;
+}
+
+function asArray(value: unknown): unknown[] {
+  return Array.isArray(value) ? value : [];
+}
+
+function toString(value: unknown): string | null {
+  return typeof value === 'string' ? value : null;
+}
+
+function toBoolean(value: unknown): boolean | null {
+  return typeof value === 'boolean' ? value : null;
+}
+
+function toNumber(value: unknown): number | null {
+  return typeof value === 'number' && Number.isFinite(value) ? value : null;
+}

packages/mcp-server/src/tools/mailbox/schema.ts

@@ -0,0 +1,79 @@
+import { z } from 'zod/v3';
+
+export const KitEmailsListInputSchema = z.object({
+  start: z.number().int().min(0).default(0),
+  limit: z.number().int().min(1).max(200).default(50),
+});
+
+const MailServerStatusSchema = z.object({
+  running: z.boolean(),
+  running_via_docker: z.boolean(),
+  api_base_url: z.string(),
+});
+
+const EmailSummarySchema = z.object({
+  id: z.string(),
+  message_id: z.string().nullable(),
+  subject: z.string().nullable(),
+  from: z.array(z.string()),
+  to: z.array(z.string()),
+  created_at: z.string().nullable(),
+  size: z.number().nullable(),
+  read: z.boolean(),
+  readAt: z.string().optional(),
+});
+
+export const KitEmailsListOutputSchema = z.object({
+  mail_server: MailServerStatusSchema,
+  start: z.number(),
+  limit: z.number(),
+  count: z.number(),
+  total: z.number(),
+  unread: z.number().nullable(),
+  messages: z.array(EmailSummarySchema),
+});
+
+export const KitEmailsReadInputSchema = z.object({
+  id: z.string().min(1),
+});
+
+export const KitEmailsReadOutputSchema = z.object({
+  mail_server: MailServerStatusSchema,
+  id: z.string(),
+  message_id: z.string().nullable(),
+  subject: z.string().nullable(),
+  from: z.array(z.string()),
+  to: z.array(z.string()),
+  cc: z.array(z.string()),
+  bcc: z.array(z.string()),
+  created_at: z.string().nullable(),
+  size: z.number().nullable(),
+  read: z.boolean(),
+  readAt: z.string().optional(),
+  text: z.string().nullable(),
+  html: z.string().nullable(),
+  headers: z.record(z.array(z.string())),
+  raw: z.unknown(),
+});
+
+export const KitEmailsSetReadStatusInputSchema = z.object({
+  id: z.string().min(1),
+  read: z.boolean(),
+});
+
+export const KitEmailsSetReadStatusOutputSchema = z.object({
+  id: z.string(),
+  read: z.boolean(),
+  readAt: z.string().optional(),
+});
+
+export type KitEmailsListInput = z.infer<typeof KitEmailsListInputSchema>;
+export type KitEmailsListOutput = z.infer<typeof KitEmailsListOutputSchema>;
+export type KitEmailsReadInput = z.infer<typeof KitEmailsReadInputSchema>;
+export type KitEmailsReadOutput = z.infer<typeof KitEmailsReadOutputSchema>;
+export type KitEmailsSetReadStatusInput = z.infer<
+  typeof KitEmailsSetReadStatusInputSchema
+>;
+export type KitEmailsSetReadStatusOutput = z.infer<
+  typeof KitEmailsSetReadStatusOutputSchema
+>;

packages/mcp-server/src/tools/migrations.ts

@@ -2,7 +2,7 @@ import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
 import { execSync } from 'node:child_process';
 import { readFile, readdir } from 'node:fs/promises';
 import { join } from 'node:path';
-import { z } from 'zod';
+import { z } from 'zod/v3';
 
 export class MigrationsTool {
   static GetMigrations() {
@@ -35,9 +35,12 @@ export function registerGetMigrationsTools(server: McpServer) {
 }
 
 function createDiffMigrationTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'diff_migrations',
-    'Compare differences between the declarative schemas and the applied migrations in Supabase',
+    {
+      description:
+        'Compare differences between the declarative schemas and the applied migrations in Supabase',
+    },
     async () => {
       const result = MigrationsTool.Diff();
       const text = result.toString('utf8');
@@ -55,13 +58,15 @@ function createDiffMigrationTool(server: McpServer) {
 }
 
 function createCreateMigrationTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'create_migration',
-    'Create a new Supabase Postgres migration file',
     {
-      state: z.object({
+      description: 'Create a new Supabase Postgres migration file',
-        name: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          name: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const result = MigrationsTool.CreateMigration(state.name);
@@ -80,13 +85,16 @@ function createCreateMigrationTool(server: McpServer) {
 }
 
 function createGetMigrationContentTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_migration_content',
-    '📜 Get migration file content (HISTORICAL) - For current state use get_schema_content instead',
     {
-      state: z.object({
+      description:
-        path: z.string(),
+        '📜 Get migration file content (HISTORICAL) - For current state use get_schema_content instead',
-      }),
+      inputSchema: {
+        state: z.object({
+          path: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const content = await MigrationsTool.getMigrationContent(state.path);
@@ -104,9 +112,12 @@ function createGetMigrationContentTool(server: McpServer) {
 }
 
 function createGetMigrationsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_migrations',
-    '📜 Get migration files (HISTORICAL CHANGES) - Use schema files for current state instead',
+    {
+      description:
+        '📜 Get migration files (HISTORICAL CHANGES) - Use schema files for current state instead',
+    },
     async () => {
       const migrations = await MigrationsTool.GetMigrations();
 

packages/mcp-server/src/tools/prd-manager.ts

@@ -1,7 +1,7 @@
 import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
-import { mkdir, readFile, readdir, writeFile } from 'node:fs/promises';
+import { mkdir, readFile, readdir, unlink, writeFile } from 'node:fs/promises';
 import { join } from 'node:path';
-import { z } from 'zod';
+import { z } from 'zod/v3';
 
 // Custom phase for organizing user stories
 interface CustomPhase {
@@ -34,6 +34,56 @@ interface UserStory {
   completedAt?: string;
 }
 
+interface RiskItem {
+  id: string;
+  description: string;
+  mitigation: string;
+  owner: string;
+  severity: 'low' | 'medium' | 'high';
+}
+
+interface CrossDependency {
+  id: string;
+  name: string;
+  description: string;
+  blocking: boolean;
+  owner?: string;
+}
+
+interface DecisionLogEntry {
+  id: string;
+  date: string;
+  decision: string;
+  rationale: string;
+  owner?: string;
+  status: 'proposed' | 'accepted' | 'superseded';
+}
+
+interface AgentTaskPacket {
+  id: string;
+  title: string;
+  scope: string;
+  doneCriteria: string[];
+  testPlan: string[];
+  likelyFiles: string[];
+  linkedStoryIds: string[];
+  dependencies: string[];
+}
+
+interface StoryTraceabilityMap {
+  storyId: string;
+  featureId: string;
+  acceptanceCriteriaIds: string[];
+  successMetricIds: string[];
+}
+
+interface CreateStructuredPRDOptions {
+  nonGoals?: string[];
+  outOfScope?: string[];
+  assumptions?: string[];
+  openQuestions?: string[];
+}
+
 // Structured PRD following ChatPRD format
 interface StructuredPRD {
   introduction: {
@@ -54,8 +104,16 @@ interface StructuredPRD {
     successMetrics: string[];
   };
 
+  nonGoals: string[];
+  outOfScope: string[];
+  assumptions: string[];
+  openQuestions: string[];
+  risks: RiskItem[];
+  dependencies: CrossDependency[];
+
   userStories: UserStory[];
   customPhases?: CustomPhase[];
+  storyTraceability: StoryTraceabilityMap[];
 
   technicalRequirements: {
     constraints: string[];
@@ -63,6 +121,13 @@ interface StructuredPRD {
     complianceRequirements: string[];
   };
 
+  technicalContracts: {
+    apis: string[];
+    dataModels: string[];
+    permissions: string[];
+    integrationBoundaries: string[];
+  };
+
   acceptanceCriteria: {
     global: string[];
     qualityStandards: string[];
@@ -75,10 +140,30 @@ interface StructuredPRD {
     nonNegotiables: string[];
   };
 
+  rolloutPlan: {
+    featureFlags: string[];
+    migrationPlan: string[];
+    rolloutPhases: string[];
+    rollbackConditions: string[];
+  };
+
+  measurementPlan: {
+    events: string[];
+    dashboards: string[];
+    baselineMetrics: string[];
+    targetMetrics: string[];
+    guardrailMetrics: string[];
+  };
+
+  decisionLog: DecisionLogEntry[];
+  agentTaskPackets: AgentTaskPacket[];
+  changeLog: string[];
+
   metadata: {
     version: string;
     created: string;
     lastUpdated: string;
+    lastValidatedAt: string;
     approver: string;
   };
 
@@ -118,6 +203,7 @@ export class PRDManager {
     solutionDescription: string,
     keyFeatures: string[],
     successMetrics: string[],
+    options?: CreateStructuredPRDOptions,
   ): Promise<string> {
     await this.ensurePRDsDirectory();
 
@@ -140,12 +226,25 @@ export class PRDManager {
         keyFeatures,
         successMetrics,
       },
+      nonGoals: options?.nonGoals ?? [],
+      outOfScope: options?.outOfScope ?? [],
+      assumptions: options?.assumptions ?? [],
+      openQuestions: options?.openQuestions ?? [],
+      risks: [],
+      dependencies: [],
       userStories: [],
+      storyTraceability: [],
       technicalRequirements: {
         constraints: [],
         integrationNeeds: [],
         complianceRequirements: [],
       },
+      technicalContracts: {
+        apis: [],
+        dataModels: [],
+        permissions: [],
+        integrationBoundaries: [],
+      },
       acceptanceCriteria: {
         global: [],
         qualityStandards: [],
@@ -155,10 +254,27 @@ export class PRDManager {
         resources: [],
         nonNegotiables: [],
       },
+      rolloutPlan: {
+        featureFlags: [],
+        migrationPlan: [],
+        rolloutPhases: [],
+        rollbackConditions: [],
+      },
+      measurementPlan: {
+        events: [],
+        dashboards: [],
+        baselineMetrics: [],
+        targetMetrics: [],
+        guardrailMetrics: [],
+      },
+      decisionLog: [],
+      agentTaskPackets: [],
+      changeLog: ['Initial PRD created'],
       metadata: {
-        version: '1.0',
+        version: '2.0',
         created: now,
         lastUpdated: now,
+        lastValidatedAt: now,
         approver: '',
       },
       progress: {
@@ -294,6 +410,28 @@ export class PRDManager {
       suggestions.push('Add global acceptance criteria for quality standards');
     }
 
+    if (prd.nonGoals.length === 0 || prd.outOfScope.length === 0) {
+      suggestions.push(
+        'Define both non-goals and out-of-scope items to reduce implementation drift',
+      );
+    }
+
+    if (prd.openQuestions.length > 0) {
+      suggestions.push(
+        `${prd.openQuestions.length} open questions remain unresolved`,
+      );
+    }
+
+    if (prd.measurementPlan.targetMetrics.length === 0) {
+      suggestions.push(
+        'Define target metrics in measurementPlan to validate delivery impact',
+      );
+    }
+
+    if (prd.rolloutPlan.rolloutPhases.length === 0) {
+      suggestions.push('Add rollout phases and rollback conditions');
+    }
+
     const vagueStories = prd.userStories.filter(
       (s) => s.acceptanceCriteria.length < 2,
     );
@@ -336,11 +474,24 @@ export class PRDManager {
     }
   }
 
+  static async deletePRD(filename: string): Promise<string> {
+    const filePath = join(this.PRDS_DIR, filename);
+
+    try {
+      await unlink(filePath);
+      return `PRD deleted successfully: ${filename}`;
+    } catch {
+      throw new Error(`PRD file "${filename}" not found`);
+    }
+  }
+
   static async getProjectStatus(filename: string): Promise<{
     progress: number;
     summary: string;
     nextSteps: string[];
     blockers: UserStory[];
+    openQuestions: string[];
+    highRisks: RiskItem[];
   }> {
     const prd = await this.loadPRD(filename);
 
@@ -357,13 +508,16 @@ export class PRDManager {
       ...nextPending.map((s) => `Start: ${s.title}`),
     ];
 
-    const summary = `${prd.progress.completed}/${prd.progress.total} stories completed (${prd.progress.overall}%). Total stories: ${prd.userStories.length}`;
+    const highRisks = prd.risks.filter((risk) => risk.severity === 'high');
+    const summary = `${prd.progress.completed}/${prd.progress.total} stories completed (${prd.progress.overall}%). Total stories: ${prd.userStories.length}. Open questions: ${prd.openQuestions.length}. High risks: ${highRisks.length}.`;
 
     return {
       progress: prd.progress.overall,
       summary,
       nextSteps,
       blockers,
+      openQuestions: prd.openQuestions,
+      highRisks,
     };
   }
 
@@ -526,7 +680,7 @@ export class PRDManager {
     const filePath = join(this.PRDS_DIR, filename);
     try {
       const content = await readFile(filePath, 'utf8');
-      return JSON.parse(content);
+      return this.normalizePRD(JSON.parse(content));
     } catch {
       throw new Error(`PRD file "${filename}" not found`);
     }
@@ -536,11 +690,101 @@ export class PRDManager {
     filename: string,
     prd: StructuredPRD,
   ): Promise<void> {
-    prd.metadata.lastUpdated = new Date().toISOString().split('T')[0];
+    const now = new Date().toISOString().split('T')[0];
+    prd.metadata.lastUpdated = now;
+    prd.metadata.lastValidatedAt = prd.metadata.lastValidatedAt || now;
+    if (prd.changeLog.length === 0) {
+      prd.changeLog.push(`Updated on ${now}`);
+    }
+
     const filePath = join(this.PRDS_DIR, filename);
     await writeFile(filePath, JSON.stringify(prd, null, 2), 'utf8');
   }
 
+  private static normalizePRD(input: unknown): StructuredPRD {
+    const prd = input as Partial<StructuredPRD>;
+    const today = new Date().toISOString().split('T')[0];
+
+    return {
+      introduction: {
+        title: prd.introduction?.title ?? 'Untitled PRD',
+        overview: prd.introduction?.overview ?? '',
+        lastUpdated: prd.introduction?.lastUpdated ?? today,
+      },
+      problemStatement: {
+        problem: prd.problemStatement?.problem ?? '',
+        marketOpportunity: prd.problemStatement?.marketOpportunity ?? '',
+        targetUsers: prd.problemStatement?.targetUsers ?? [],
+      },
+      solutionOverview: {
+        description: prd.solutionOverview?.description ?? '',
+        keyFeatures: prd.solutionOverview?.keyFeatures ?? [],
+        successMetrics: prd.solutionOverview?.successMetrics ?? [],
+      },
+      nonGoals: prd.nonGoals ?? [],
+      outOfScope: prd.outOfScope ?? [],
+      assumptions: prd.assumptions ?? [],
+      openQuestions: prd.openQuestions ?? [],
+      risks: prd.risks ?? [],
+      dependencies: prd.dependencies ?? [],
+      userStories: prd.userStories ?? [],
+      customPhases: prd.customPhases ?? [],
+      storyTraceability: prd.storyTraceability ?? [],
+      technicalRequirements: {
+        constraints: prd.technicalRequirements?.constraints ?? [],
+        integrationNeeds: prd.technicalRequirements?.integrationNeeds ?? [],
+        complianceRequirements:
+          prd.technicalRequirements?.complianceRequirements ?? [],
+      },
+      technicalContracts: {
+        apis: prd.technicalContracts?.apis ?? [],
+        dataModels: prd.technicalContracts?.dataModels ?? [],
+        permissions: prd.technicalContracts?.permissions ?? [],
+        integrationBoundaries:
+          prd.technicalContracts?.integrationBoundaries ?? [],
+      },
+      acceptanceCriteria: {
+        global: prd.acceptanceCriteria?.global ?? [],
+        qualityStandards: prd.acceptanceCriteria?.qualityStandards ?? [],
+      },
+      constraints: {
+        timeline: prd.constraints?.timeline ?? '',
+        budget: prd.constraints?.budget,
+        resources: prd.constraints?.resources ?? [],
+        nonNegotiables: prd.constraints?.nonNegotiables ?? [],
+      },
+      rolloutPlan: {
+        featureFlags: prd.rolloutPlan?.featureFlags ?? [],
+        migrationPlan: prd.rolloutPlan?.migrationPlan ?? [],
+        rolloutPhases: prd.rolloutPlan?.rolloutPhases ?? [],
+        rollbackConditions: prd.rolloutPlan?.rollbackConditions ?? [],
+      },
+      measurementPlan: {
+        events: prd.measurementPlan?.events ?? [],
+        dashboards: prd.measurementPlan?.dashboards ?? [],
+        baselineMetrics: prd.measurementPlan?.baselineMetrics ?? [],
+        targetMetrics: prd.measurementPlan?.targetMetrics ?? [],
+        guardrailMetrics: prd.measurementPlan?.guardrailMetrics ?? [],
+      },
+      decisionLog: prd.decisionLog ?? [],
+      agentTaskPackets: prd.agentTaskPackets ?? [],
+      changeLog: prd.changeLog ?? [],
+      metadata: {
+        version: prd.metadata?.version ?? '2.0',
+        created: prd.metadata?.created ?? today,
+        lastUpdated: prd.metadata?.lastUpdated ?? today,
+        lastValidatedAt: prd.metadata?.lastValidatedAt ?? today,
+        approver: prd.metadata?.approver ?? '',
+      },
+      progress: {
+        overall: prd.progress?.overall ?? 0,
+        completed: prd.progress?.completed ?? 0,
+        total: prd.progress?.total ?? 0,
+        blocked: prd.progress?.blocked ?? 0,
+      },
+    };
+  }
+
   private static extractTitleFromAction(action: string): string {
     const cleaned = action.trim().toLowerCase();
     const words = cleaned.split(' ').slice(0, 4);
@@ -604,6 +848,58 @@ export class PRDManager {
       content += `- ${metric}\n`;
     });
 
+    content += `\n## Scope Guardrails\n\n`;
+    content += `### Non-Goals\n`;
+    if (prd.nonGoals.length > 0) {
+      prd.nonGoals.forEach((item) => {
+        content += `- ${item}\n`;
+      });
+    } else {
+      content += `- None specified\n`;
+    }
+
+    content += `\n### Out of Scope\n`;
+    if (prd.outOfScope.length > 0) {
+      prd.outOfScope.forEach((item) => {
+        content += `- ${item}\n`;
+      });
+    } else {
+      content += `- None specified\n`;
+    }
+
+    content += `\n### Assumptions\n`;
+    if (prd.assumptions.length > 0) {
+      prd.assumptions.forEach((item) => {
+        content += `- ${item}\n`;
+      });
+    } else {
+      content += `- None specified\n`;
+    }
+
+    content += `\n### Open Questions\n`;
+    if (prd.openQuestions.length > 0) {
+      prd.openQuestions.forEach((item) => {
+        content += `- ${item}\n`;
+      });
+    } else {
+      content += `- None\n`;
+    }
+
+    if (prd.risks.length > 0) {
+      content += `\n## Risks\n`;
+      prd.risks.forEach((risk) => {
+        content += `- [${risk.severity}] ${risk.description} | Mitigation: ${risk.mitigation} | Owner: ${risk.owner}\n`;
+      });
+    }
+
+    if (prd.dependencies.length > 0) {
+      content += `\n## Dependencies\n`;
+      prd.dependencies.forEach((dependency) => {
+        const mode = dependency.blocking ? 'blocking' : 'non-blocking';
+        content += `- ${dependency.name} (${mode}) - ${dependency.description}\n`;
+      });
+    }
+
     content += `\n## User Stories\n\n`;
 
     const priorities: UserStory['priority'][] = ['P0', 'P1', 'P2', 'P3'];
@@ -637,6 +933,20 @@ export class PRDManager {
       content += `**Blocked:** ${prd.progress.blocked} stories need attention\n`;
     }
 
+    if (prd.rolloutPlan.rolloutPhases.length > 0) {
+      content += `\n## Rollout Plan\n`;
+      prd.rolloutPlan.rolloutPhases.forEach((phase) => {
+        content += `- ${phase}\n`;
+      });
+    }
+
+    if (prd.measurementPlan.targetMetrics.length > 0) {
+      content += `\n## Measurement Plan\n`;
+      prd.measurementPlan.targetMetrics.forEach((metric) => {
+        content += `- ${metric}\n`;
+      });
+    }
+
     content += `\n---\n\n`;
     content += `*Approver: ${prd.metadata.approver || 'TBD'}*\n`;
 
@@ -661,6 +971,7 @@ export function registerPRDTools(server: McpServer) {
   createListPRDsTool(server);
   createGetPRDTool(server);
   createCreatePRDTool(server);
+  createDeletePRDTool(server);
   createAddUserStoryTool(server);
   createUpdateStoryStatusTool(server);
   createExportMarkdownTool(server);
@@ -670,9 +981,11 @@ export function registerPRDTools(server: McpServer) {
 }
 
 function createListPRDsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'list_prds',
-    'List all Product Requirements Documents',
+    {
+      description: 'List all Product Requirements Documents',
+    },
     async () => {
       const prds = await PRDManager.listPRDs();
 
@@ -702,13 +1015,15 @@ function createListPRDsTool(server: McpServer) {
 }
 
 function createGetPRDTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_prd',
-    'Get the contents of a specific PRD file',
     {
-      state: z.object({
+      description: 'Get the contents of a specific PRD file',
-        filename: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          filename: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const content = await PRDManager.getPRDContent(state.filename);
@@ -726,20 +1041,27 @@ function createGetPRDTool(server: McpServer) {
 }
 
 function createCreatePRDTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'create_prd',
-    'Create a new structured PRD following ChatPRD best practices',
     {
-      state: z.object({
+      description:
-        title: z.string(),
+        'Create a new structured PRD following ChatPRD best practices',
-        overview: z.string(),
+      inputSchema: {
-        problemStatement: z.string(),
+        state: z.object({
-        marketOpportunity: z.string(),
+          title: z.string(),
-        targetUsers: z.array(z.string()),
+          overview: z.string(),
-        solutionDescription: z.string(),
+          problemStatement: z.string(),
-        keyFeatures: z.array(z.string()),
+          marketOpportunity: z.string(),
-        successMetrics: z.array(z.string()),
+          targetUsers: z.array(z.string()),
-      }),
+          solutionDescription: z.string(),
+          keyFeatures: z.array(z.string()),
+          successMetrics: z.array(z.string()),
+          nonGoals: z.array(z.string()).optional(),
+          outOfScope: z.array(z.string()).optional(),
+          assumptions: z.array(z.string()).optional(),
+          openQuestions: z.array(z.string()).optional(),
+        }),
+      },
     },
     async ({ state }) => {
       const filename = await PRDManager.createStructuredPRD(
@@ -751,6 +1073,12 @@ function createCreatePRDTool(server: McpServer) {
         state.solutionDescription,
         state.keyFeatures,
         state.successMetrics,
+        {
+          nonGoals: state.nonGoals,
+          outOfScope: state.outOfScope,
+          assumptions: state.assumptions,
+          openQuestions: state.openQuestions,
+        },
       );
 
       return {
@@ -765,19 +1093,47 @@ function createCreatePRDTool(server: McpServer) {
   );
 }
 
-function createAddUserStoryTool(server: McpServer) {
+function createDeletePRDTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
-    'add_user_story',
+    'delete_prd',
-    'Add a new user story to an existing PRD',
     {
-      state: z.object({
+      description: 'Delete an existing PRD file',
-        filename: z.string(),
+      inputSchema: {
-        userType: z.string(),
+        state: z.object({
-        action: z.string(),
+          filename: z.string(),
-        benefit: z.string(),
+        }),
-        acceptanceCriteria: z.array(z.string()),
+      },
-        priority: z.enum(['P0', 'P1', 'P2', 'P3']).default('P2'),
+    },
-      }),
+    async ({ state }) => {
+      const result = await PRDManager.deletePRD(state.filename);
+
+      return {
+        content: [
+          {
+            type: 'text',
+            text: result,
+          },
+        ],
+      };
+    },
+  );
+}
+
+function createAddUserStoryTool(server: McpServer) {
+  return server.registerTool(
+    'add_user_story',
+    {
+      description: 'Add a new user story to an existing PRD',
+      inputSchema: {
+        state: z.object({
+          filename: z.string(),
+          userType: z.string(),
+          action: z.string(),
+          benefit: z.string(),
+          acceptanceCriteria: z.array(z.string()),
+          priority: z.enum(['P0', 'P1', 'P2', 'P3']).default('P2'),
+        }),
+      },
     },
     async ({ state }) => {
       const result = await PRDManager.addUserStory(
@@ -802,23 +1158,25 @@ function createAddUserStoryTool(server: McpServer) {
 }
 
 function createUpdateStoryStatusTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'update_story_status',
-    'Update the status of a specific user story',
     {
-      state: z.object({
+      description: 'Update the status of a specific user story',
-        filename: z.string(),
+      inputSchema: {
-        storyId: z.string(),
+        state: z.object({
-        status: z.enum([
+          filename: z.string(),
-          'not_started',
+          storyId: z.string(),
-          'research',
+          status: z.enum([
-          'in_progress',
+            'not_started',
-          'review',
+            'research',
-          'completed',
+            'in_progress',
-          'blocked',
+            'review',
-        ]),
+            'completed',
-        notes: z.string().optional(),
+            'blocked',
-      }),
+          ]),
+          notes: z.string().optional(),
+        }),
+      },
     },
     async ({ state }) => {
       const result = await PRDManager.updateStoryStatus(
@@ -841,13 +1199,15 @@ function createUpdateStoryStatusTool(server: McpServer) {
 }
 
 function createExportMarkdownTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'export_prd_markdown',
-    'Export PRD as markdown for visualization and sharing',
     {
-      state: z.object({
+      description: 'Export PRD as markdown for visualization and sharing',
-        filename: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          filename: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const markdownFile = await PRDManager.exportAsMarkdown(state.filename);
@@ -865,13 +1225,15 @@ function createExportMarkdownTool(server: McpServer) {
 }
 
 function createGetImplementationPromptsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_implementation_prompts',
-    'Generate Claude Code implementation prompts from PRD',
     {
-      state: z.object({
+      description: 'Generate Claude Code implementation prompts from PRD',
-        filename: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          filename: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const prompts = await PRDManager.generateImplementationPrompts(
@@ -904,13 +1266,15 @@ function createGetImplementationPromptsTool(server: McpServer) {
 }
 
 function createGetImprovementSuggestionsTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_improvement_suggestions',
-    'Get AI-powered suggestions to improve the PRD',
     {
-      state: z.object({
+      description: 'Get AI-powered suggestions to improve the PRD',
-        filename: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          filename: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const suggestions = await PRDManager.getImprovementSuggestions(
@@ -943,13 +1307,15 @@ function createGetImprovementSuggestionsTool(server: McpServer) {
 }
 
 function createGetProjectStatusTool(server: McpServer) {
-  return server.tool(
+  return server.registerTool(
     'get_project_status',
-    'Get comprehensive status overview of the PRD project',
     {
-      state: z.object({
+      description: 'Get comprehensive status overview of the PRD project',
-        filename: z.string(),
+      inputSchema: {
-      }),
+        state: z.object({
+          filename: z.string(),
+        }),
+      },
     },
     async ({ state }) => {
       const status = await PRDManager.getProjectStatus(state.filename);
@@ -970,6 +1336,22 @@ function createGetProjectStatusTool(server: McpServer) {
         status.blockers.forEach((blocker) => {
           result += `- ${blocker.title}: ${blocker.notes || 'No details provided'}\n`;
         });
+        result += '\n';
+      }
+
+      if (status.highRisks.length > 0) {
+        result += `**High Risks:**\n`;
+        status.highRisks.forEach((risk) => {
+          result += `- ${risk.description} (Owner: ${risk.owner || 'Unassigned'})\n`;
+        });
+        result += '\n';
+      }
+
+      if (status.openQuestions.length > 0) {
+        result += `**Open Questions:**\n`;
+        status.openQuestions.slice(0, 5).forEach((question) => {
+          result += `- ${question}\n`;
+        });
       }
 
       return {

packages/mcp-server/src/tools/prerequisites/__tests__/kit-prerequisites.service.test.ts

@@ -0,0 +1,109 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  type KitPrerequisitesDeps,
+  createKitPrerequisitesService,
+} from '../kit-prerequisites.service';
+
+function createDeps(overrides: Partial<KitPrerequisitesDeps> = {}) {
+  const base: KitPrerequisitesDeps = {
+    async getVariantFamily() {
+      return 'supabase';
+    },
+    async executeCommand(command: string, _args: string[]) {
+      if (command === 'node')
+        return { stdout: 'v22.5.0\n', stderr: '', exitCode: 0 };
+      if (command === 'pnpm')
+        return { stdout: '10.19.0\n', stderr: '', exitCode: 0 };
+      if (command === 'git')
+        return { stdout: 'git version 2.44.0\n', stderr: '', exitCode: 0 };
+      if (command === 'docker')
+        return {
+          stdout: 'Docker version 26.1.0, build abc\n',
+          stderr: '',
+          exitCode: 0,
+        };
+      if (command === 'supabase')
+        return { stdout: '2.75.5\n', stderr: '', exitCode: 0 };
+      if (command === 'stripe') throw new Error('not installed');
+
+      throw new Error(`unexpected command: ${command}`);
+    },
+  };
+
+  return {
+    ...base,
+    ...overrides,
+  };
+}
+
+describe('KitPrerequisitesService', () => {
+  it('returns pass/warn statuses in a healthy supabase setup', async () => {
+    const service = createKitPrerequisitesService(createDeps());
+    const result = await service.check({});
+
+    expect(result.ready_to_develop).toBe(true);
+    expect(result.overall).toBe('warn');
+
+    const node = result.prerequisites.find((item) => item.id === 'node');
+    const supabase = result.prerequisites.find(
+      (item) => item.id === 'supabase',
+    );
+    const stripe = result.prerequisites.find((item) => item.id === 'stripe');
+
+    expect(node?.status).toBe('pass');
+    expect(supabase?.status).toBe('pass');
+    expect(stripe?.status).toBe('warn');
+  });
+
+  it('fails when required supabase cli is missing for supabase family', async () => {
+    const service = createKitPrerequisitesService(
+      createDeps({
+        async executeCommand(command: string, args: string[]) {
+          if (command === 'supabase') {
+            throw new Error('missing');
+          }
+
+          return createDeps().executeCommand(command, args);
+        },
+      }),
+    );
+
+    const result = await service.check({});
+    const supabase = result.prerequisites.find(
+      (item) => item.id === 'supabase',
+    );
+
+    expect(supabase?.required).toBe(true);
+    expect(supabase?.status).toBe('fail');
+    expect(result.overall).toBe('fail');
+    expect(result.ready_to_develop).toBe(false);
+  });
+
+  it('treats supabase cli as optional for orm family', async () => {
+    const service = createKitPrerequisitesService(
+      createDeps({
+        async getVariantFamily() {
+          return 'orm';
+        },
+        async executeCommand(command: string, args: string[]) {
+          if (command === 'supabase') {
+            throw new Error('missing');
+          }
+
+          return createDeps().executeCommand(command, args);
+        },
+      }),
+    );
+
+    const result = await service.check({});
+    const supabase = result.prerequisites.find(
+      (item) => item.id === 'supabase',
+    );
+
+    expect(supabase?.required).toBe(false);
+    expect(supabase?.status).toBe('warn');
+    expect(result.overall).toBe('warn');
+    expect(result.ready_to_develop).toBe(true);
+  });
+});

packages/mcp-server/src/tools/prerequisites/__tests__/kit-prerequisites.tool.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest';
+
+import { registerKitPrerequisitesTool } from '../index';
+import { KitPrerequisitesOutputSchema } from '../schema';
+
+interface RegisteredTool {
+  name: string;
+  handler: (input: unknown) => Promise<Record<string, unknown>>;
+}
+
+describe('registerKitPrerequisitesTool', () => {
+  it('registers kit_prerequisites and returns typed structured output', async () => {
+    const tools: RegisteredTool[] = [];
+
+    const server = {
+      registerTool(
+        name: string,
+        _config: Record<string, unknown>,
+        handler: (input: unknown) => Promise<Record<string, unknown>>,
+      ) {
+        tools.push({ name, handler });
+        return {};
+      },
+    };
+
+    registerKitPrerequisitesTool(server as never);
+
+    expect(tools).toHaveLength(1);
+    expect(tools[0]?.name).toBe('kit_prerequisites');
+
+    const result = await tools[0]!.handler({});
+    const parsed = KitPrerequisitesOutputSchema.parse(result.structuredContent);
+
+    expect(parsed.prerequisites.length).toBeGreaterThan(0);
+    expect(typeof parsed.ready_to_develop).toBe('boolean');
+  });
+});

packages/mcp-server/src/tools/prerequisites/index.ts

@@ -0,0 +1,191 @@
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { execFile } from 'node:child_process';
+import { access, readFile } from 'node:fs/promises';
+import { join } from 'node:path';
+import { promisify } from 'node:util';
+
+import {
+  type KitPrerequisitesDeps,
+  createKitPrerequisitesService,
+} from './kit-prerequisites.service';
+import {
+  KitPrerequisitesInputSchema,
+  KitPrerequisitesOutputSchema,
+} from './schema';
+
+const execFileAsync = promisify(execFile);
+
+export function registerKitPrerequisitesTool(server: McpServer) {
+  return server.registerTool(
+    'kit_prerequisites',
+    {
+      description: 'Check installed tools and versions for this kit variant',
+      inputSchema: KitPrerequisitesInputSchema,
+      outputSchema: KitPrerequisitesOutputSchema,
+    },
+    async (input) => {
+      const parsedInput = KitPrerequisitesInputSchema.parse(input);
+
+      try {
+        const service = createKitPrerequisitesService(
+          createKitPrerequisitesDeps(),
+        );
+
+        const result = await service.check(parsedInput);
+
+        return {
+          structuredContent: result,
+          content: [
+            {
+              type: 'text',
+              text: JSON.stringify(result),
+            },
+          ],
+        };
+      } catch (error) {
+        return {
+          isError: true,
+          content: [
+            {
+              type: 'text',
+              text: `kit_prerequisites failed: ${toErrorMessage(error)}`,
+            },
+          ],
+        };
+      }
+    },
+  );
+}
+
+function createKitPrerequisitesDeps(): KitPrerequisitesDeps {
+  const rootPath = process.cwd();
+
+  return {
+    async getVariantFamily() {
+      const variant = await resolveVariant(rootPath);
+      return variant.includes('supabase') ? 'supabase' : 'orm';
+    },
+    async executeCommand(command: string, args: string[]) {
+      const result = await executeWithFallback(rootPath, command, args);
+
+      return {
+        stdout: result.stdout,
+        stderr: result.stderr,
+        exitCode: 0,
+      };
+    },
+  };
+}
+
+async function executeWithFallback(
+  rootPath: string,
+  command: string,
+  args: string[],
+) {
+  try {
+    return await execFileAsync(command, args, {
+      cwd: rootPath,
+    });
+  } catch (error) {
+    // Local CLI tools are often installed in node_modules/.bin in this monorepo.
+    if (isLocalCliCandidate(command)) {
+      const localBinCandidates = [
+        join(rootPath, 'node_modules', '.bin', command),
+        join(rootPath, 'apps', 'web', 'node_modules', '.bin', command),
+      ];
+
+      for (const localBin of localBinCandidates) {
+        try {
+          return await execFileAsync(localBin, args, {
+            cwd: rootPath,
+          });
+        } catch {
+          // Try next local binary candidate.
+        }
+      }
+
+      try {
+        return await execFileAsync('pnpm', ['exec', command, ...args], {
+          cwd: rootPath,
+        });
+      } catch {
+        return execFileAsync(
+          'pnpm',
+          ['--filter', 'web', 'exec', command, ...args],
+          {
+            cwd: rootPath,
+          },
+        );
+      }
+    }
+
+    if (command === 'pnpm') {
+      return execFileAsync(command, args, {
+        cwd: rootPath,
+      });
+    }
+
+    throw error;
+  }
+}
+
+function isLocalCliCandidate(command: string) {
+  return command === 'supabase' || command === 'stripe';
+}
+
+async function resolveVariant(rootPath: string) {
+  const configPath = join(rootPath, '.makerkit', 'config.json');
+
+  try {
+    await access(configPath);
+    const config = JSON.parse(await readFile(configPath, 'utf8')) as Record<
+      string,
+      unknown
+    >;
+
+    const variant =
+      readString(config, 'variant') ??
+      readString(config, 'template') ??
+      readString(config, 'kitVariant');
+
+    if (variant) {
+      return variant;
+    }
+  } catch {
+    // Fall through to heuristic.
+  }
+
+  if (await pathExists(join(rootPath, 'apps', 'web', 'supabase'))) {
+    return 'next-supabase';
+  }
+
+  return 'next-drizzle';
+}
+
+function readString(obj: Record<string, unknown>, key: string) {
+  const value = obj[key];
+  return typeof value === 'string' && value.length > 0 ? value : null;
+}
+
+async function pathExists(path: string) {
+  try {
+    await access(path);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+function toErrorMessage(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+
+  return 'Unknown error';
+}
+
+export {
+  createKitPrerequisitesService,
+  type KitPrerequisitesDeps,
+} from './kit-prerequisites.service';
+export type { KitPrerequisitesOutput } from './schema';

packages/mcp-server/src/tools/prerequisites/kit-prerequisites.service.ts

@@ -0,0 +1,405 @@
+import type {
+  KitPrerequisiteItem,
+  KitPrerequisitesInput,
+  KitPrerequisitesOutput,
+} from './schema';
+
+type VariantFamily = 'supabase' | 'orm';
+
+interface CommandResult {
+  stdout: string;
+  stderr: string;
+  exitCode: number;
+}
+
+interface ToolVersion {
+  installed: boolean;
+  version: string | null;
+}
+
+export interface KitPrerequisitesDeps {
+  getVariantFamily(): Promise<VariantFamily>;
+  executeCommand(command: string, args: string[]): Promise<CommandResult>;
+}
+
+export function createKitPrerequisitesService(deps: KitPrerequisitesDeps) {
+  return new KitPrerequisitesService(deps);
+}
+
+export class KitPrerequisitesService {
+  constructor(private readonly deps: KitPrerequisitesDeps) {}
+
+  async check(_input: KitPrerequisitesInput): Promise<KitPrerequisitesOutput> {
+    const family = await this.deps.getVariantFamily();
+
+    const [node, pnpm, git, docker, supabaseCli, stripeCli] = await Promise.all(
+      [
+        this.getNodeVersion(),
+        this.getPnpmVersion(),
+        this.getGitVersion(),
+        this.getDockerVersion(),
+        this.getSupabaseVersion(),
+        this.getStripeVersion(),
+      ],
+    );
+
+    const prerequisites: KitPrerequisiteItem[] = [];
+
+    prerequisites.push(
+      this.createRequiredItem({
+        id: 'node',
+        name: 'Node.js',
+        minimumVersion: '20.10.0',
+        installUrl: 'https://nodejs.org',
+        version: node,
+      }),
+    );
+
+    prerequisites.push(
+      this.createRequiredItem({
+        id: 'pnpm',
+        name: 'pnpm',
+        minimumVersion: '10.0.0',
+        installCommand: 'npm install -g pnpm',
+        version: pnpm,
+      }),
+    );
+
+    prerequisites.push(
+      this.createRequiredItem({
+        id: 'git',
+        name: 'Git',
+        minimumVersion: '2.0.0',
+        installUrl: 'https://git-scm.com/downloads',
+        version: git,
+      }),
+    );
+
+    prerequisites.push(
+      this.createRequiredItem({
+        id: 'docker',
+        name: 'Docker',
+        minimumVersion: '20.10.0',
+        installUrl: 'https://docker.com/products/docker-desktop',
+        requiredFor:
+          family === 'supabase' ? 'Local Supabase stack' : 'Local PostgreSQL',
+        version: docker,
+      }),
+    );
+
+    prerequisites.push(
+      this.createVariantConditionalItem({
+        id: 'supabase',
+        name: 'Supabase CLI',
+        minimumVersion: '2.0.0',
+        installCommand: 'npm install -g supabase',
+        required: family === 'supabase',
+        requiredFor: 'Supabase variants',
+        version: supabaseCli,
+      }),
+    );
+
+    prerequisites.push(
+      this.createVariantConditionalItem({
+        id: 'stripe',
+        name: 'Stripe CLI',
+        minimumVersion: '1.0.0',
+        installUrl: 'https://docs.stripe.com/stripe-cli',
+        required: false,
+        requiredFor: 'Payment webhook testing',
+        version: stripeCli,
+      }),
+    );
+
+    const overall = this.computeOverall(prerequisites);
+
+    return {
+      prerequisites,
+      overall,
+      ready_to_develop: overall !== 'fail',
+    };
+  }
+
+  private computeOverall(items: KitPrerequisiteItem[]) {
+    if (items.some((item) => item.required && item.status === 'fail')) {
+      return 'fail' as const;
+    }
+
+    if (items.some((item) => item.status === 'warn')) {
+      return 'warn' as const;
+    }
+
+    return 'pass' as const;
+  }
+
+  private createRequiredItem(params: {
+    id: string;
+    name: string;
+    minimumVersion: string;
+    version: ToolVersion;
+    installUrl?: string;
+    installCommand?: string;
+    requiredFor?: string;
+  }): KitPrerequisiteItem {
+    const status = this.getVersionStatus(params.version, params.minimumVersion);
+
+    return {
+      id: params.id,
+      name: params.name,
+      required: true,
+      required_for: params.requiredFor,
+      installed: params.version.installed,
+      version: params.version.version,
+      minimum_version: params.minimumVersion,
+      status,
+      install_url: params.installUrl,
+      install_command: params.installCommand,
+      message: this.getMessage(params.version, params.minimumVersion, true),
+      remedies: this.getRemedies(params, status, true),
+    };
+  }
+
+  private createVariantConditionalItem(params: {
+    id: string;
+    name: string;
+    minimumVersion: string;
+    version: ToolVersion;
+    required: boolean;
+    requiredFor?: string;
+    installUrl?: string;
+    installCommand?: string;
+  }): KitPrerequisiteItem {
+    if (!params.required) {
+      if (!params.version.installed) {
+        return {
+          id: params.id,
+          name: params.name,
+          required: false,
+          required_for: params.requiredFor,
+          installed: false,
+          version: null,
+          minimum_version: params.minimumVersion,
+          status: 'warn',
+          install_url: params.installUrl,
+          install_command: params.installCommand,
+          message: `${params.name} is optional but recommended for ${params.requiredFor ?? 'developer workflows'}.`,
+          remedies: params.installCommand
+            ? [params.installCommand]
+            : params.installUrl
+              ? [params.installUrl]
+              : [],
+        };
+      }
+
+      const status = this.getVersionStatus(
+        params.version,
+        params.minimumVersion,
+      );
+
+      return {
+        id: params.id,
+        name: params.name,
+        required: false,
+        required_for: params.requiredFor,
+        installed: true,
+        version: params.version.version,
+        minimum_version: params.minimumVersion,
+        status: status === 'fail' ? 'warn' : status,
+        install_url: params.installUrl,
+        install_command: params.installCommand,
+        message: this.getMessage(params.version, params.minimumVersion, false),
+        remedies: this.getRemedies(
+          {
+            ...params,
+          },
+          status === 'fail' ? 'warn' : status,
+          false,
+        ),
+      };
+    }
+
+    const status = this.getVersionStatus(params.version, params.minimumVersion);
+
+    return {
+      id: params.id,
+      name: params.name,
+      required: true,
+      required_for: params.requiredFor,
+      installed: params.version.installed,
+      version: params.version.version,
+      minimum_version: params.minimumVersion,
+      status,
+      install_url: params.installUrl,
+      install_command: params.installCommand,
+      message: this.getMessage(params.version, params.minimumVersion, true),
+      remedies: this.getRemedies(params, status, true),
+    };
+  }
+
+  private getVersionStatus(version: ToolVersion, minimumVersion: string) {
+    if (!version.installed || !version.version) {
+      return 'fail' as const;
+    }
+
+    const cmp = compareVersions(version.version, minimumVersion);
+
+    if (cmp < 0) {
+      return 'fail' as const;
+    }
+
+    return 'pass' as const;
+  }
+
+  private getMessage(
+    version: ToolVersion,
+    minimumVersion: string,
+    required: boolean,
+  ) {
+    if (!version.installed) {
+      return required
+        ? 'Required tool is not installed.'
+        : 'Optional tool is not installed.';
+    }
+
+    if (!version.version) {
+      return 'Tool is installed but version could not be detected.';
+    }
+
+    const cmp = compareVersions(version.version, minimumVersion);
+
+    if (cmp < 0) {
+      return `Installed version ${version.version} is below minimum ${minimumVersion}.`;
+    }
+
+    return `Installed version ${version.version} satisfies minimum ${minimumVersion}.`;
+  }
+
+  private getRemedies(
+    params: {
+      installUrl?: string;
+      installCommand?: string;
+      minimumVersion: string;
+    },
+    status: 'pass' | 'warn' | 'fail',
+    required: boolean,
+  ) {
+    if (status === 'pass') {
+      return [];
+    }
+
+    const remedies: string[] = [];
+
+    if (params.installCommand) {
+      remedies.push(params.installCommand);
+    }
+
+    if (params.installUrl) {
+      remedies.push(params.installUrl);
+    }
+
+    remedies.push(`Ensure version is >= ${params.minimumVersion}`);
+
+    if (!required && status === 'warn') {
+      remedies.push(
+        'Optional for development but useful for related workflows',
+      );
+    }
+
+    return remedies;
+  }
+
+  private async getNodeVersion() {
+    try {
+      const result = await this.deps.executeCommand('node', ['--version']);
+      return {
+        installed: true,
+        version: normalizeVersion(result.stdout),
+      };
+    } catch {
+      return { installed: false, version: null };
+    }
+  }
+
+  private async getPnpmVersion() {
+    try {
+      const result = await this.deps.executeCommand('pnpm', ['--version']);
+      return {
+        installed: true,
+        version: normalizeVersion(result.stdout),
+      };
+    } catch {
+      return { installed: false, version: null };
+    }
+  }
+
+  private async getGitVersion() {
+    try {
+      const result = await this.deps.executeCommand('git', ['--version']);
+      return {
+        installed: true,
+        version: normalizeVersion(result.stdout),
+      };
+    } catch {
+      return { installed: false, version: null };
+    }
+  }
+
+  private async getDockerVersion() {
+    try {
+      const result = await this.deps.executeCommand('docker', ['--version']);
+      return {
+        installed: true,
+        version: normalizeVersion(result.stdout),
+      };
+    } catch {
+      return { installed: false, version: null };
+    }
+  }
+
+  private async getSupabaseVersion() {
+    try {
+      const result = await this.deps.executeCommand('supabase', ['--version']);
+      return {
+        installed: true,
+        version: normalizeVersion(result.stdout),
+      };
+    } catch {
+      return { installed: false, version: null };
+    }
+  }
+
+  private async getStripeVersion() {
+    try {
+      const result = await this.deps.executeCommand('stripe', ['--version']);
+      return {
+        installed: true,
+        version: normalizeVersion(result.stdout),
+      };
+    } catch {
+      return { installed: false, version: null };
+    }
+  }
+}
+
+function normalizeVersion(input: string) {
+  const match = input.match(/\d+\.\d+\.\d+/);
+
+  return match ? match[0] : null;
+}
+
+function compareVersions(a: string, b: string) {
+  const left = a.split('.').map((part) => Number(part));
+  const right = b.split('.').map((part) => Number(part));
+
+  const length = Math.max(left.length, right.length);
+
+  for (let i = 0; i < length; i++) {
+    const l = left[i] ?? 0;
+    const r = right[i] ?? 0;
+
+    if (l > r) return 1;
+    if (l < r) return -1;
+  }
+
+  return 0;
+}

packages/mcp-server/src/tools/prerequisites/schema.ts

@@ -0,0 +1,30 @@
+import { z } from 'zod/v3';
+
+export const KitPrerequisitesInputSchema = z.object({});
+
+export const KitPrerequisiteItemSchema = z.object({
+  id: z.string(),
+  name: z.string(),
+  required: z.boolean(),
+  required_for: z.string().optional(),
+  installed: z.boolean(),
+  version: z.string().nullable(),
+  minimum_version: z.string().nullable(),
+  status: z.enum(['pass', 'warn', 'fail']),
+  install_url: z.string().optional(),
+  install_command: z.string().optional(),
+  message: z.string().optional(),
+  remedies: z.array(z.string()).default([]),
+});
+
+export const KitPrerequisitesOutputSchema = z.object({
+  prerequisites: z.array(KitPrerequisiteItemSchema),
+  overall: z.enum(['pass', 'warn', 'fail']),
+  ready_to_develop: z.boolean(),
+});
+
+export type KitPrerequisitesInput = z.infer<typeof KitPrerequisitesInputSchema>;
+export type KitPrerequisiteItem = z.infer<typeof KitPrerequisiteItemSchema>;
+export type KitPrerequisitesOutput = z.infer<
+  typeof KitPrerequisitesOutputSchema
+>;