routing: fast-path voice when transcription not configured

docs/plans/state.json

@@ -1,6 +1,6 @@
 {
   "version": "1.0",
-  "updated_at": "2026-02-13",
+  "updated_at": "2026-02-14",
   "description": "Tracks the status of all Flynn plans and implementation phases",
 
   "plans": {
@@ -38,6 +38,16 @@
       ],
       "test_status": "pnpm test:run (targeted suites) + pnpm typecheck passing"
     },
+    "voice-message-transcription-fastpath": {
+      "status": "completed",
+      "date": "2026-02-14",
+      "summary": "When a non-audio-capable model receives a voice attachment but audio transcription is not configured, route replies via a deterministic fast-path config help message instead of invoking the LLM (which cannot safely consume the audio).",
+      "files_modified": [
+        "src/daemon/routing.ts",
+        "src/daemon/routing.test.ts"
+      ],
+      "test_status": "pnpm test:run src/daemon/routing.test.ts + pnpm typecheck passing (full pnpm test:run fails in this sandbox due to EPERM listen/spawn)"
+    },
     "p0-p1-implementation-plan": {
       "file": "2026-02-06-p0-p1-implementation-plan.md",
       "status": "completed",