STT config.save() silently fails due to None value in TOML serialization

[Kyotani-Hub]

Bug Description

The config.save() method in the STT plugin always fails silently (returns False) when input_device is None (the default value). This is because tomli_w cannot serialize Python None values — TOML has no null type — and the resulting TypeError is caught by a bare except Exception: return False.

This means no configuration changes can be saved after a fresh install until input_device is explicitly set to a non-None value.

Steps to Reproduce

1. Install the STT plugin and run /elevenlabs-stt:setup
2. Set an API key via config.api_key = '...' and call config.save()
3. save() returns False — the config file is not written
4. On next Config.load(), the API key is lost

Root Cause

In stt/src/elevenlabs_stt/config.py, the save() method (line 154-169) includes all fields in the TOML dict:

data = {
    "elevenlabs-stt": {
        ...
        "input_device": self.input_device,  # This is None by default
        ...
    }
}

input_device defaults to None (line 49):

input_device: Optional[str] = Field(default=None, ...)

When tomli_w.dump() encounters None, it raises:

TypeError: Object of type 'NoneType' is not TOML serializable

This exception is silently caught on line 183:

except Exception:
    return False

Suggested Fix

Filter out None values before serialization:

data = {
    "elevenlabs-stt": {k: v for k, v in {
        "api_key": self.api_key,
        "model_id": self.model_id,
        # ... other fields ...
        "input_device": self.input_device,
        # ... other fields ...
    }.items() if v is not None}
}

Or alternatively, convert None to a sentinel/empty string before dumping.

Environment

• Claude Code v2.1.92
• Windows 11
• Python 3.11.9 (via uv)
• tomli_w 1.2.0

[ericvegasdev-spec]

Saw both your elevenlabs/plugins issues. The silent TOML save failure on fresh install is brutal because no error tells you why nothing persists. If you want voice-loop-to-Claude-Code without debugging an OSS plugin's serialization layer, I built a productized version that ships configured. Want to see how it works? remote-claude.com