Check platform, Music availability, JXA connectivity, and writable object kinds.

Return playback state, current track, position, volume, shuffle, repeat, and EQ.

Return track and playlist counts without returning the full library.

List playlists with stable IDs, kinds, parents, counts, and mutation capabilities.

Get one playlist by persistent ID.

List a playlist's tracks in current order with opaque pagination.

Search or browse local library tracks with metadata filters and stable IDs.

Resolve up to 500 persistent track IDs while preserving request order.

Run deterministic library or playlist analysis without sending every track to the AI.

List AirPlay outputs and EQ presets, including active selections.

Control playback or play a local track/playlist by persistent ID.

Set volume, mute, shuffle, repeat, EQ, and AirPlay output selection.

Validate library mutations and return a 10-minute, single-use approval token.

Read a pending or completed plan without exposing approval token hashes.

Cancel a pending plan without changing Music.

Apply an approved plan after token, expiry, and optimistic concurrency checks.

List persistent audit history without exposing stored before/after metadata.

Create a normal preview-and-approval plan for the reversible part of a prior change.