Thalia is a free native Mac app for Meta's Muse Code CLI. Plan mode restarts Muse read-only until you approve the plan. Every command is shown in full, step by step, before Allow. Review lets you run your checks and approve the exact snapshot, and any later edit invalidates it. Checkpoints, MCP connectors, voice mode and an embedded terminal are built in. Uses your own Muse access, sends no telemetry, and runs on Apple Silicon Macs with macOS 27.
