This site. Project pages for Satsuma's own work and then for everyone: repositories mirrored from GitHub, sessions recorded with the satsuma command, updates checked against the mirror, numbered decisions that hold until replaced, a per-model track record, and the API at /services/api that the command and the agents speak. One Worker on satsuma.one (D1, KV, R2) and the command's repository.
Document the API as the contract with a repository-only way in, rename the machine command from composition to satsuma, and close the loop from an approved record to an update and decisions.