Marc-André Bombeck
7ec3bf0dad
Let a remote MCP client (Claude.ai, ChatGPT) self-register and connect to the `/mcp` endpoint over OAuth 2.1 + PKCE, bridged onto the existing `hlk_` Bearer model — no parallel identity store. - Discovery: RFC 9728 Protected Resource Metadata and RFC 8414 Authorization Server Metadata at `/.well-known/oauth-protected-resource` and `/.well-known/oauth-authorization-server` (added to the proxy allowlist). - `/api/mcp/oauth/authorize` — consent gate backed by the existing session; a code is only issued on an authenticated POST decision, never on a GET. - `/api/mcp/oauth/token` — authorization-code and refresh-token grants with mandatory PKCE S256, single-use codes, and rotating refresh tokens. The access token is an ordinary short-lived `hlk_` token scoped `health:read`. - `/api/mcp/oauth/register` — RFC 7591 DCR fallback; CIMD (SEP-991) is the preferred path and resolves client metadata through `safeFetch`. - Audience binding (RFC 8707): every token is bound to the canonical `/mcp` resource URI; a mismatched `resource` is rejected at authorize and token. - The grant artifacts (code, refresh, DCR client id) are HMAC-signed, self-describing, and domain-separated; the central log redactors scrub them plus the PKCE verifier.
src/app/
The Next.js App Router tree: the page surfaces a logged-in user sees and the REST API under api/. Server components are the default; "use client" is added only where a hook, state, or browser API needs it. Routing is file-based — a page.tsx is a page, a route.ts is an API endpoint.
API routes (api/)
Every endpoint wraps its handler in apiHandler (@/lib/api-handler), parses any body with Zod safeParse, narrows userId from the session or Bearer token (never from the body), and returns the { data, error, meta? } envelope. requireAdmin() is cookie-only, so api/admin/ is unreachable by Bearer token. Notable groups:
auth/— login, register, password, passkey (WebAuthn), refresh, Codex device-OAuth.measurements/,mood-entries/,medications/,sleep/— the core health-data CRUD + batch/bulk ingest.ingest/— external Bearer-token ingest surfaces.insights/,analytics/,dashboard/— AI insights, the Coach SSE stream, trend summaries, the first-paint dashboard snapshot.withings/,whoop/,fitbit/,integrations/,sync/— OAuth connect/sync/webhook surfaces and the offline delta feed.fhir/,share-links/,doctor-report/,export/,import/— clinician-facing FHIR R4 read API, shareable records, report + data export.notifications/,devices/,send/,telegram/— channel registration, device tokens, dispatch, webhook intake.admin/— operator panel APIs (cookie-only).health/,version/,meta/,internal/— health check, build-version probe, runtime metadata, worker-internal routes.
Page surfaces
measurements/, medications/, mood/, insights/, achievements/, notifications/, settings/, onboarding/, admin/, plus the public about/, privacy/, bugreport/, the share-record route c/, and the root dashboard (page.tsx). Shared shell + chrome lives in layout.tsx; error.tsx / global-error.tsx / not-found.tsx / loading.tsx cover the framework boundaries. layout.tsx holds the one nonce-bound dangerouslySetInnerHTML (theme bootstrap).
Conventions
See ../../CLAUDE.md. The request-flow walk in .planning/codebase/arch.md annotates each layer with file:line citations. Related dirs: handlers compose ../lib/; pages render ../components/.