Install Dependencies

Two surfaces:

1. System binaries — ffmpeg, optional sox / typst. Installed via the host package manager with explicit user approval.
2. Python tools — librosa, numpy, deepfilternet (the deepFilter binary), optional parselmouth, silero-vad, matplotlib. Installed into a plugin-owned uv venv at <data-dir>/venv/.

The plugin's commands always invoke Python via <data-dir>/venv/bin/python and <data-dir>/venv/bin/deepFilter, so the user's system Python stays untouched and PEP 668 / externally-managed-environment errors never occur.

Resolve paths

PLUGIN_DATA_DIR="${CLAUDE_USER_DATA:-${XDG_DATA_HOME:-$HOME/.local/share}/claude-plugins}/audio-production"
VENV_DIR="$PLUGIN_DATA_DIR/venv"

Procedure

1. Detect host