MCP server for AI music composition. A typed, immutable music theory library — pitches, rhythms, harmony, form, transforms. Agents compose incrementally and export to MIDI and LilyPond.
$claude plugin marketplace add deer/music.buildInstalls into the current project.
Install music.build by running `claude plugin marketplace add deer/music.build`, then use it for the current task and follow its documentation at https://github.com/deer/music.build.