models: add synthetic provider

docs/plans/state.json

@@ -100,6 +100,21 @@
       ],
       "test_status": "pnpm typecheck passing (no new tests added in this change)"
     },
+    "synthetic-model-provider": {
+      "status": "completed",
+      "date": "2026-02-14",
+      "summary": "Added a local-only `synthetic` model provider for offline development and deterministic tests. Supports echo/fixed/error modes and a dev `@tool <name> <json>` directive to emit tool calls.",
+      "files_created": [
+        "src/models/synthetic.ts",
+        "src/models/synthetic.test.ts"
+      ],
+      "files_modified": [
+        "src/config/schema.ts",
+        "src/models/index.ts",
+        "src/daemon/models.ts"
+      ],
+      "test_status": "pnpm test:run src/models/synthetic.test.ts + pnpm typecheck passing"
+    },
     "p0-p1-implementation-plan": {
       "file": "2026-02-06-p0-p1-implementation-plan.md",
       "status": "completed",
@@ -1931,7 +1946,7 @@
     "tier2_completion": "4/4 (100%) — inbound webhooks, vector memory search, Dockerfile, heartbeat monitor",
     "tier3_completion": "5/5 (100%) — lane queue, credential redaction, web UI token dashboard, xAI (Grok) provider, Voyage AI embeddings",
     "tier4_completion": "4/4 (100%) — gateway lock, shell completion, Tailscale Serve/Funnel, DM pairing codes",
-    "feature_gap_scorecard": "100/128 match (78%), 0 partial (0%), 28 missing (22%)",
+    "feature_gap_scorecard": "101/128 match (79%), 0 partial (0%), 27 missing (21%)",
     "operator_dx_milestone": "Phase 3 (Live Ops Dashboard): 2/2 plans complete — milestone done",
     "gmail_auth_cli": "flynn gmail-auth command implemented with OAuth2 flow, doctor check, config routed to Telegram",
     "native_audio_support": "completed — smart routing for native audio (Gemini/OpenAI/GitHub) vs Whisper transcription fallback",