Crate map

Ports (traits only) and impls — new backends are new impl crates, never core changes.

Crate	Role
sturn-core	Event/Op/Verdict, Config, topic names
sturn-wal → sturn-wal-git	append-only op log in git refs (CAS)
sturn-bus → sturn-bus-redb	topic pub/sub cache over the WAL
sturn-ws → sturn-ws-git	virtual workspaces over the ODB
sturn-vcs → sturn-git	remote sync/push; snap_commit bridge
sturn-claim	pure claim logic: fold → live locks → conflicts
sturn-mcp	the agent tool contract (M3 wires the server)
sturn-config → sturn-config-toml	config source
sturn-secret → sturn-keyring/sturn-dotenv	secret resolution
sturn-service → sturn-systemd	daemon lifecycle
sturn-cli	sturn binary — the composition root

Rustdoc: /api/sturn_core/ etc. after bun run docs:api.