feat(gateway): add websocket ingress rate limiting

docs/plans/state.json

@@ -2478,6 +2478,24 @@
         "docs/plans/analysis/2026-02-16-codebase-audit-report.md"
       ],
       "test_status": "pnpm test:run src/backends/native/agent.test.ts src/backends/native/orchestrator.test.ts + pnpm typecheck passing"
+    },
+    "audit-followup-ws-rate-limiting": {
+      "status": "completed",
+      "date": "2026-02-16",
+      "updated": "2026-02-16",
+      "summary": "Implemented gateway WebSocket ingress rate limiting (token bucket per connection) with deterministic throttle errors and close-on-repeated-violation enforcement; added schema/config wiring and tests.",
+      "files_modified": [
+        "src/gateway/server.ts",
+        "src/gateway/server.test.ts",
+        "src/config/schema.ts",
+        "src/config/schema.test.ts",
+        "src/daemon/services.ts",
+        "config/default.yaml",
+        "README.md",
+        "docs/deployment/PRODUCTION.md",
+        "docs/plans/analysis/2026-02-16-codebase-audit-report.md"
+      ],
+      "test_status": "pnpm test:run src/gateway/server.test.ts src/config/schema.test.ts + pnpm typecheck passing"
     }
   },
   "overall_progress": {