# lel

Python X11 STT daemon that records audio, runs Whisper, applies local AI cleanup, and injects text.

## Requirements

- X11 (Wayland support scaffolded but not available yet)
- `sounddevice` (PortAudio)
- `faster-whisper`
- `llama-cpp-python`
- Tray icon deps: `gtk3`, `libayatana-appindicator3`
- Python deps (core): `numpy`, `pillow`, `faster-whisper`, `llama-cpp-python`, `sounddevice`
- X11 extras: `PyGObject`, `python-xlib`

System packages (example names): `portaudio`/`libportaudio2`.

<details>
<summary>Ubuntu (X11)</summary>

```bash
sudo apt install -y portaudio19-dev libportaudio2 python3-gi gir1.2-gtk-3.0 libayatana-appindicator3-1
```

</details>

<details>
<summary>Debian (X11)</summary>

```bash
sudo apt install -y portaudio19-dev libportaudio2 python3-gi gir1.2-gtk-3.0 libayatana-appindicator3-1
```

</details>

<details>
<summary>Arch Linux (X11)</summary>

```bash
sudo pacman -S --needed portaudio gtk3 libayatana-appindicator
```

</details>

<details>
<summary>Fedora (X11)</summary>

```bash
sudo dnf install -y portaudio portaudio-devel gtk3 libayatana-appindicator-gtk3
```

</details>

<details>
<summary>openSUSE (X11)</summary>

```bash
sudo zypper install -y portaudio portaudio-devel gtk3 libayatana-appindicator3-1
```

</details>

## Python Daemon

Install Python deps:

X11 (supported):

```bash
uv sync --extra x11
```

Wayland (scaffold only):

```bash
uv sync --extra wayland
```

Run:

```bash
uv run python3 src/leld.py --config ~/.config/lel/config.json
```

## Config

Create `~/.config/lel/config.json`:

```json
{
  "daemon": { "hotkey": "Cmd+m" },
  "recording": { "input": "0" },
  "stt": { "model": "base", "device": "cpu" },
  "injection": {
    "backend": "clipboard",
    "remove_transcription_from_clipboard": false
  },
  "ai": { "enabled": true },
  "vocabulary": {
    "replacements": [
      { "from": "Martha", "to": "Marta" },
      { "from": "docker", "to": "Docker" }
    ],
    "terms": ["Systemd", "Kubernetes"],
    "max_rules": 500,
    "max_terms": 500
  },
  "domain_inference": { "enabled": true, "mode": "auto" }
}
```

Recording input can be a device index (preferred) or a substring of the device
name.

`ai.enabled` is accepted for compatibility but currently has no runtime effect.
AI cleanup is always enabled and uses the locked local Llama-3.2-3B GGUF model
downloaded to `~/.cache/lel/models/` on first use.

Use `-v/--verbose` to enable DEBUG logs, including recognized/processed
transcript text and llama.cpp logs (`llama::` prefix). Without `-v`, logs are
INFO level.

Vocabulary correction:

- `vocabulary.replacements` is deterministic correction (`from -> to`).
- `vocabulary.terms` is a preferred spelling list used as hinting context.
- Wildcards are intentionally rejected (`*`, `?`, `[`, `]`, `{`, `}`) to avoid ambiguous rules.
- Rules are deduplicated case-insensitively; conflicting replacements are rejected.
- Limits are bounded by `max_rules` and `max_terms`.

Domain inference:

- `domain_inference.mode` currently supports `auto`.
- Domain context is advisory only and is used to improve cleanup prompts.
- When confidence is low, it falls back to `general` context.

STT hinting:

- Vocabulary is passed to Whisper as `hotwords`/`initial_prompt` only when those
  arguments are supported by the installed `faster-whisper` runtime.

## systemd user service

```bash
mkdir -p ~/.local/share/lel/src/assets
cp src/*.py ~/.local/share/lel/src/
cp src/assets/*.png ~/.local/share/lel/src/assets/
cp systemd/lel.service ~/.config/systemd/user/lel.service
systemctl --user daemon-reload
systemctl --user enable --now lel
```

## Usage

- Press the hotkey once to start recording.
- Press it again to stop and run STT.
- Press `Esc` while recording to cancel without processing.
- Transcript contents are logged only when `-v/--verbose` is used.

Wayland note:

- Running under Wayland currently exits with a message explaining that it is not supported yet.

Injection backends:

- `clipboard`: copy to clipboard and inject via Ctrl+Shift+V (GTK clipboard + XTest)
- `injection`: type the text with simulated keypresses (XTest)
- `injection.remove_transcription_from_clipboard`: when `true` and backend is `clipboard`, restores/clears the clipboard after paste so the transcript is not kept there

AI processing:

- Local llama.cpp model only (no remote provider configuration).

Control:

```bash
make run
make check
```