Two coordinated changes that unblock downstream audio pipelines
(diarization, custom transcription, archival) on attachments larger
than the public Bot API's 20MB getFile ceiling.
- `stt.enabled: false` no longer drops voice/audio with a generic
"transcription disabled" note. The gateway probes the cached file's
duration (wave → mutagen → ffprobe ladder) and surfaces
`[The user sent a voice message: <abs path> (duration: M:SS)]` to
the agent so a skill or tool can pick up the raw file. The previous
placeholder is replaced rather than appended when present.
- `platforms.telegram.extra.base_url` set → adapter auto-lifts its
document size cap from 20MB to 2GB (the local telegram-bot-api
`--local` ceiling) and the "too large" reply reports the active
limit dynamically. No new config knob; presence of `base_url` is the
opt-in.
- `platforms.telegram.extra.local_mode: true` wires
`Application.builder().local_mode(True)` on the python-telegram-bot
builder. PTB then reads files from disk instead of HTTP, which is
required when telegram-bot-api runs in `--local` mode (the server
returns absolute filesystem paths, not `/file/bot...` URLs).
- gateway/run.py: rewrites the `stt.enabled: false` branch of
`_enrich_message_with_transcription`. New `_format_duration` +
`_probe_audio_duration` helpers.
- gateway/platforms/telegram.py: `_max_doc_bytes` instance attribute
derived from `extra.base_url`; `local_mode` builder wiring;
dynamic "too large" message.
- tests/gateway/test_stt_config.py: covers path-surfacing with and
without an existing user message, and placeholder replacement.
- tests/gateway/test_telegram_max_doc_bytes.py: 3 cases — default 20MB
without base_url, 2GB when set, empty-string base_url keeps default.
- website/docs/user-guide/messaging/telegram.md: new "Skipping STT"
subsection under Voice Messages and a full "Large Files (>20MB) via
Local Bot API Server" walkthrough (api_id/api_hash, docker-compose,
one-time `logOut` migration, `platforms.telegram.extra` config, the
`local_mode` disk-access requirement, the silent HTTP-fallback 404).
- website/docs/user-guide/features/voice-mode.md: documents the
`stt.enabled` knob in the config reference.
- `pytest tests/gateway/test_telegram_max_doc_bytes.py
tests/gateway/test_stt_config.py` → 9/9 passing.
- Verified end-to-end on a live deployment: gateway log shows
`Using custom Telegram base_url: http://...` and
`Using Telegram local_mode (read files from disk)` on startup;
voice messages above 20MB cache to disk and surface their path to
the agent.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Legacy flat stt.model config key (from cli-config.yaml.example and older
versions) was passed as a model override to transcribe_audio() by the
gateway, bypassing provider-specific model resolution. When the provider
was 'local' (faster-whisper), this caused:
ValueError: Invalid model size 'whisper-1'
Changes:
- gateway/run.py, discord.py: stop passing model override — let
transcribe_audio() handle provider-specific model resolution internally
- get_stt_model_from_config(): now provider-aware, reads from the correct
nested section (stt.local.model, stt.openai.model, etc.); ignores
legacy flat key for local provider to prevent model name mismatch
- cli-config.yaml.example: updated STT section to show nested provider
config structure instead of legacy flat key
- config migration v13→v14: moves legacy stt.model to the correct
provider section and removes the flat key
Reported by community user on Discord.
Restore local STT command fallback for voice transcription, detect whisper and ffmpeg in common local install paths, and avoid bogus no-provider messaging when only a backend-specific key is missing.
- bridge stt.enabled from config.yaml into gateway runtime config
- preserve the flag in GatewayConfig serialization
- skip gateway voice transcription when STT is disabled
- add regression tests for config loading and disabled transcription flow
