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## Summary Splits the Stack Auth MCP server out of `apps/backend` and into a dedicated Next.js app at `apps/mcp/`, served on port `:42` (suffixed via `NEXT_PUBLIC_STACK_PORT_PREFIX`) and exposed in production at `https://mcp.stack-auth.com/mcp`. The backend no longer carries the MCP transport route; clients now point at the new host. Base: `dev` → Head: `chore/move-mcp-to-a-sep-app` Scope: 34 files, +1425 / −353 ## What changed - **New app** `apps/mcp/` — standalone Next.js + `@vercel/mcp-adapter`, with: - `src/app/api/internal/[transport]/route.ts` — MCP transport handler (moved from backend) - `src/app/mcp/route.ts`, `src/app/route.ts` — public landing + setup page - `src/app/health/route.ts` — health check - `src/mcp-handler.ts`, `src/setup-page.ts`, `src/analytics.ts` - **Backend** drops `apps/backend/src/app/api/internal/[transport]/route.ts` (−105) — MCP code is gone from the backend image. - **Dashboard** install hint updated to point at `https://mcp.stack-auth.com/mcp` (was `/`). - **Dev launchpad** gets an MCP tile so the new service shows up alongside the rest of the local stack. - **CI** workflows (`db-migration-backwards-compatibility`, `e2e-api-tests*`) start the MCP service in the background before running tests. - **Docs** (`docs-mintlify`, `docs/`) and `init-stack` / `init-prompt` updated to reference the new URL. - **E2E** `apps/e2e/tests/backend/endpoints/api/v1/internal/mcp.test.ts` reworked to hit the new host; `helpers.ts` and env files gain an MCP base-URL var. ## Visuals ### New `apps/mcp` setup page (`https://mcp.stack-auth.com/`) The standalone app's root now serves a self-contained MCP setup guide with per-client instructions (Cursor, VS Code, Codex, Claude Code, Claude Desktop, Windsurf, ChatGPT, Gemini CLI):  ### Dev launchpad now lists the MCP service New tile at port suffix `:42`, importance 2, alongside Backend / Dashboard / Demo app:  ## Notes for reviewers - The MCP transport endpoint moved path: it was mounted under `/api/internal/[transport]` in the backend; in the new app it's at the same path but on the dedicated host. The public-facing URL is `https://mcp.stack-auth.com/mcp`. - `apps/mcp` ships its own PostHog analytics client (`src/analytics.ts`) so the backend doesn't have to proxy events for it anymore. - Port allocation: `${PORT_PREFIX}42` (default `8142` in dev). Picked to fit the existing dev-launchpad importance-2 row. - No DB migrations. ## Test plan - [x] `apps/mcp` builds and `pnpm dev` serves on `:8142` - [x] Dev launchpad renders the new MCP tile (screenshot above) - [x] MCP setup page renders client tabs (screenshot above) - [x] E2E `mcp.test.ts` updated to hit the new host - [ ] CI green on `e2e-api-tests*` and `db-migration-backwards-compatibility` workflows (they were touched to start the MCP service) - [ ] `init-stack` / `mcp.ts` install flow lands users on the new URL <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Standalone MCP app added with a public /mcp endpoint and health check. * MCP appears in the dev-launchpad apps list. * **Documentation** * MCP endpoint updated to https://mcp.stack-auth.com/mcp in all setup guides and installer snippets. * Setup page enhanced with detailed client install tabs and instructions. * **Chores** * MCP service integrated into CI/e2e workflows and local env configs. <!-- end of auto-generated comment: release notes by coderabbit.ai --> |
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