ci: add TypeDoc validation to check:all with treatWarningsAsErrors

- Add `treatWarningsAsErrors: true` to `typedoc.config.mjs` so TypeDoc
  exits non-zero on any warning (stale `@param`, broken `@link`, etc.)
- Append `pnpm run docs:check` to the root `check:all` script so CI
  validates documentation alongside typecheck and lint
- Remove per-package `typedoc --emit none` from client and server
  `check` scripts — the root holistic run is the authoritative check and
  uses the correct `entryPointStrategy: "packages"` config

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jonathanhefner

package.json

@@ -31,7 +31,7 @@
         "prepack:all": "pnpm -r prepack",
         "lint:all": "pnpm -r lint",
         "lint:fix:all": "pnpm -r lint:fix",
-        "check:all": "pnpm -r typecheck && pnpm -r lint",
+        "check:all": "pnpm -r typecheck && pnpm -r lint && pnpm run docs:check",
         "test:all": "pnpm -r test",
         "test:conformance:client": "pnpm --filter @modelcontextprotocol/test-conformance run test:conformance:client",
         "test:conformance:client:all": "pnpm --filter @modelcontextprotocol/test-conformance run test:conformance:client:all",

packages/client/package.json

@@ -55,7 +55,7 @@
         "prepack": "npm run build",
         "lint": "eslint src/ && prettier --ignore-path ../../.prettierignore --check .",
         "lint:fix": "eslint src/ --fix && prettier --ignore-path ../../.prettierignore --write .",
-        "check": "npm run typecheck && npm run lint && pnpm exec -- typedoc --emit none",
+        "check": "npm run typecheck && npm run lint",
         "test": "vitest run",
         "test:watch": "vitest",
         "start": "npm run server",

packages/server/package.json

@@ -55,7 +55,7 @@
         "prepack": "npm run build",
         "lint": "eslint src/ && prettier --ignore-path ../../.prettierignore --check .",
         "lint:fix": "eslint src/ --fix && prettier --ignore-path ../../.prettierignore --write .",
-        "check": "npm run typecheck && npm run lint && pnpm exec -- typedoc --emit none",
+        "check": "npm run typecheck && npm run lint",
         "test": "vitest run",
         "test:watch": "vitest",
         "start": "npm run server",

typedoc.config.mjs

@@ -38,5 +38,6 @@ export default {
     headings: {
         readme: false
     },
+    treatWarningsAsErrors: true,
     out: 'tmp/docs/',
 };