Feishu Voice (ElevenLabs)

SKILL.md

---
name: feishu-voice
description: Send and receive voice messages on Feishu (Lark) using ElevenLabs TTS and STT. Activate when user asks to send a voice message on Feishu, or when receiving a Feishu audio message (media attachment with .ogg/.opus file) that needs transcription. Supports smart reply mode — auto voice-reply to voice messages, text-reply to text messages.
---

# Feishu Voice (TTS + STT)

Send voice messages and transcribe received voice messages on Feishu using ElevenLabs.

## Prerequisites

- `sag` CLI (ElevenLabs TTS): `npm i -g sag` or `go install`
- `ffmpeg` / `ffprobe`: `brew install ffmpeg`
- ElevenLabs paid plan (required for library voices)
- Feishu app with `im:message:send_as_bot` and `im:file` permissions

## Environment Variables

| Variable | Required | Description |
|---|---|---|
| `ELEVENLABS_API_KEY` | ✅ | ElevenLabs API key |
| `FEISHU_APP_ID` | ✅ (TTS) | Feishu app ID |
| `FEISHU_APP_SECRET` | ✅ (TTS) | Feishu app secret |
| `ELEVENLABS_VOICE_ID` | ✅ (TTS) | Voice ID (browse at elevenlabs.io/voice-library) |
| `ELEVENLABS_MODEL_ID` | ✅ (TTS) | Model ID (e.g. `eleven_multilingual_v2`, `eleven_v3`) |
| `ELEVENLABS_SPEED` | ❌ | Speech speed 0.5-2.0 (default: 1.0) |

If `FEISHU_APP_ID` / `FEISHU_APP_SECRET` are not in env, extract from openclaw config:

```bash
export FEISHU_APP_ID=$(python3 -c "import json; print(json.load(open('$HOME/.openclaw/openclaw.json'))['channels']['feishu']['appId'])")
export FEISHU_APP_SECRET=$(python3 -c "import json; print(json.load(open('$HOME/.openclaw/openclaw.json'))['channels']['feishu']['appSecret'])")
```

## Voice Selection

See `config/voice-config.example.json` for a curated voice list. Browse all voices at https://elevenlabs.io/voice-library or run `sag voices`.

Recommended models:
- `eleven_multilingual_v2` — best for Chinese and multilingual content
- `eleven_v3` — latest English-optimized model

## Sending Voice Messages (TTS)

```bash
scripts/feishu-voice-send.sh <text> <receive_id> [receive_id_type] [speed]
```

- `receive_id`: target user `open_id` or `chat_id`
- `receive_id_type`: `open_id` (default) or `chat_id`
- `speed`: speech speed multiplier, 0.5-2.0 (default: 1.0)

## Receiving Voice Messages (STT)

When OpenClaw delivers a Feishu voice message, it arrives as a media attachment (`.ogg` file). Transcribe with:

```bash
scripts/feishu-voice-stt.sh /path/to/audio.ogg
```

Returns recognized text to stdout. Uses ElevenLabs `scribe_v1` model with automatic language detection.

### Fallback: Download via Feishu API

If the audio file is not delivered as an attachment (only `file_key` available):

1. List recent messages: `GET /im/v1/messages?container_id_type=chat&container_id=CHAT_ID&page_size=5&sort_type=ByCreateTimeDesc`
2. Download audio: `GET /im/v1/messages/{message_id}/resources/{file_key}?type=file`
3. Run STT script on the downloaded file

## Smart Reply Mode

When receiving messages, follow this pattern for natural conversation:

- **Voice message received** → transcribe with STT → understand → reply with voice (TTS)
- **Text message received** → understand → reply with text
- Override: user can request voice/text reply explicitly

## Important Notes

- Feishu `msg_type` must be `"audio"` — not `"media"` or `"file"`
- OpenClaw's `message` tool `asVoice` does not work correctly for Feishu — use this script instead
- STT uses ElevenLabs `scribe_v1` model, supports Chinese, English, and 90+ languages
- For free ElevenLabs accounts, only premade voices work; library voices require a paid plan