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Marc-André Bombeck
79e0eca023
The SDK renders every tool's Zod shape with a fixed draft-07 target and stamps "$schema": "http://json-schema.org/draft-07/schema#" on each inputSchema and outputSchema. Clients that validate with a 2020-12-only validator refuse that dialect when the tool list arrives, so every tool was unusable there (#1170). Wrap the tools/list handler once, after the last tool is registered, and re-render each advertised schema from the same Zod shape with the draft-2020-12 target, without a $schema key. A schema with no $schema is 2020-12 under the MCP spec and still compiles in a draft-07 client. All other fields of a tool entry pass through unchanged, and the SDK keeps validating structuredContent against the Zod shape, so tool results are unaffected. For the current surface the 54 rendered schemas differ from the previous ones only by the dropped key. The new guard reads tools/list through a real client for a write-scoped session, rejects any draft-07 marker or construct, and compiles every schema with Ajv's 2020-12 build (ajv added as a dev dependency at the version the SDK already resolves).
src/
Application source. HealthLog is a Next.js 16 App Router project (output: "standalone", React 19, TypeScript strict). The path alias @/* resolves to this directory. Everything a request touches lives under here; the layout below follows the request flow rather than alphabetical order.
Request flow
client → src/proxy.ts → src/app/<route>/route.ts → src/lib/api-handler.ts → handler body → src/lib/api-response.ts → client
proxy.ts— the HTTP edge (Next.js 16's renamedmiddleware). Public-path allowlist, demo-mode mutation block, server-side onboarding redirect, worker-only refusal,x-request-id+ CSP nonce generation, every security header.app/— App Router pages (RSC by default) and API routes. Every API route wraps its handler inapiHandler. Seeapp/README.md.lib/— the server/runtime toolkit:apiHandler, auth, crypto, rollups, AI, notifications, pg-boss jobs, integrations, rate limiting. Seelib/README.md.components/— React components (shadcn/ui new-york, kebab-case files). Seecomponents/README.md.
Other directories
hooks/— shared React hooks (use-prefix, kebab-case).types/— shared TypeScript declarations.generated/prisma/— the generated Prisma client (do not edit; regenerated byprisma generate). Imported as@/generated/prisma.instrumentation.ts— Next.js startup hook; boots the pg-boss worker registry and boot-time backfill queues.__tests__/— cross-cutting unit tests; most tests live in__tests__/folders next to the code they cover.
Conventions
See ../CLAUDE.md for the full set. The load-bearing ones: RSC by default ("use client" only when a hook/state/browser API needs it); every API route wraps apiHandler and parses its body with Zod safeParse; userId is always narrowed from session or Bearer, never accepted as a body field; TanStack Query keys come only from src/lib/query-keys/; outbound HTTP goes through src/lib/safe-fetch.ts.