docs(plan): add pi canary evaluation gate and tracking (diagram review no topology change)

docs/plans/state.json

@@ -3,6 +3,26 @@
   "updated_at": "2026-02-24",
   "description": "Tracks the status of all Flynn plans and implementation phases",
   "plans": {
+    "pi-embedded-backend-canary-evaluation-phase": {
+      "status": "in_progress",
+      "date": "2026-02-24",
+      "updated": "2026-02-24",
+      "summary": "Started formal Pi embedded canary evaluation with reproducible audit-log summarization (route/success/fallback/session latency), explicit rollout gate thresholds, and a decision record template covering reliability, latency, fallback taxonomy, and tool-compat findings.",
+      "files_modified": [
+        "src/audit/backendCanarySummary.ts",
+        "src/audit/backendCanarySummary.test.ts",
+        "scripts/summarize-backend-canary.ts",
+        "package.json",
+        "README.md",
+        "docs/plans/pi_embedded_evaluation.md",
+        "docs/plans/artifacts/.gitkeep",
+        "docs/architecture/AGENT_DIAGRAM.md",
+        "docs/architecture/GATEWAY_SESSIONS_AND_QUEUE.md",
+        "docs/api/PROTOCOL.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/audit/backendCanarySummary.test.ts + pnpm typecheck + pnpm audit:backend-canary (smoke run) passing; pnpm lint unchanged warnings-only baseline"
+    },
     "pi-embedded-backend-canary-spike": {
       "status": "completed",
       "date": "2026-02-24",
@@ -6430,7 +6450,7 @@
     }
   },
   "overall_progress": {
-    "total_test_count": 1989,
+    "total_test_count": 1992,
     "all_tests_passing": true,
     "p0_completion": "3/3 (100%)",
     "p1_completion": "4/4 (100%)",
@@ -6461,7 +6481,8 @@
     "native_audio_support": "completed — smart routing for native audio (Gemini/OpenAI/GitHub) vs Whisper transcription fallback, plus 2026-02-23 arg hydration hardening, tool.args_rewritten audit metric, transient fetch retry/timeout hardening, localhost->127.0.0.1 fallback for transcription endpoint connectivity, and whisper docker-compose entrypoint arg fix for port 18801",
     "remaining_phases_completion": "Phase 1: 3/3 (100%) — context levels, command registry, memory structure. Phase 2: 3/3 (100%) — component registry, confidence routing, history index. Phase 3: 2/2 (100%) — adaptive memory/compaction, truthfulness/autonomy hardening",
     "next_up": "Track OpenClaw evolution regularly for inspiration and feature ideas",
-    "pi_embedded_canary_spike": "completed — added optional pi_embedded backend adapter, canary-safe no-tools routing guard, backend success/fallback latency audit events, and docs/diagram updates while native remains default"
+    "pi_embedded_canary_spike": "completed — added optional pi_embedded backend adapter, canary-safe no-tools routing guard, backend success/fallback latency audit events, and docs/diagram updates while native remains default",
+    "pi_embedded_evaluation_phase": "in progress — added audit-backed canary summarizer + gate thresholds + decision template for reliability/latency/tool-compat rollout decisions"
   },
   "soul_md_and_cron_create": {
     "date": "2026-02-11",