feat: activate gemini voice tts path

docs/PLAN.md

@@ -205,9 +205,9 @@ From the remote plan snapshot and health check on `2026-06-27`:
   not an implemented research agent yet.
 - Deployment reliability is partial; API health is reachable, but API/static
   site/worker together must still be reverified before demo.
-- Env docs are inconsistent: backend defaults are `gemini-3.5-flash` and
-  `gemini-3.1-flash-live-preview`, while `.env.example` still lists older
-  Gemini model names.
+- Env docs now align on `gemini-3.5-flash` for vision and
+  `gemini-3.1-flash-tts-preview` for voice. The backend still preserves a Gemini
+  Live path for future available Live models.
 
 ### Not yet proven
 

docs/digitalocean.md

@@ -69,7 +69,7 @@ LIVEKIT_API_SECRET=...
 
 GEMINI_API_KEY=...
 GEMINI_VISION_MODEL=gemini-2.0-flash
-GEMINI_LIVE_MODEL=gemini-live-2.5-flash
+GEMINI_LIVE_MODEL=gemini-3.1-flash-tts-preview
 
 GITHUB_TOKEN=...
 GITHUB_REPO=karti-ai/podman

docs/gemini.md

@@ -109,11 +109,11 @@ Respond with the message text only.
 
 ---
 
-## 4. Voice Output — Gemini Live 2.5 via LiveKit
+## 4. Voice Output — Gemini TTS via LiveKit
 
-**Model:** `gemini-live-2.5-flash` (confirm exact ID from LiveKit Agents docs)
+**Model:** `gemini-3.1-flash-tts-preview`
 
-**Integration:** LiveKit Agents framework — Hermes runs as a LiveKit Agent with Gemini Live 2.5 as the voice provider
+**Integration:** Hermes generates Gemini TTS audio and publishes it as a LiveKit audio track. The code still preserves a Gemini Live path for future available Live models.
 
 **Flow:**
 

docs/livekit.md

@@ -89,11 +89,11 @@ Hermes uses the same endpoint. Grants:
 
 ---
 
-## Gemini Live 2.5 model
+## Gemini voice model
 
-- Model ID: `gemini-live-2.5-flash` — confirm exact ID from LiveKit Agents + Gemini docs at build time
-- LiveKit Agents has native Gemini Live integration — no manual audio encoding needed
-- Hermes passes text string → Agents handles streaming audio publication
+- Model ID: `gemini-3.1-flash-tts-preview`
+- Hermes generates Gemini TTS audio and publishes it as a LiveKit audio track.
+- The backend keeps a Gemini Live path for future model availability, but the verified deployment path uses TTS.
 
 ---
 

docs/superpowers/specs/2026-06-27-podman-design.md

@@ -72,7 +72,7 @@ PodMan is a real-time AI team coordination agent for software teams. Engineers j
 - **Vision:** `gemini-2.0-flash` — screen → `{ currentFile, inferredTask, terminalVisible, recentTerminalOutput, confidence }`
 - **Event detection:** `gemini-2.0-flash` — all engineer states → `{ event, involvedEngineers, file, reason }`
 - **Nudge generation:** `gemini-2.0-flash` — event → spoken message text
-- **Voice:** `gemini-live-2.5-flash` via LiveKit Agents — text → streaming audio
+- **Voice:** `gemini-3.1-flash-tts-preview` via LiveKit audio publication — text → audio
 
 ### MongoDB Atlas (4 collections)