Append one message to the coordination-bus blackboard (append-only). v1 stores action_flag but performs no action -- it is display-only, seen by a human watching the command-center panel.

Recent bus messages, newest first, optionally filtered by topic.

Claim a coordination lane before starting work in it: claim-if-free, steal-if-lease-expired, renew-if-you-already-own-it. A 409 (lane held live by another owner) comes back as a clean ok=False conflict, not a crash. The bus may grant a shorter lease than requested (server-side ceiling, coordination-bus v1.3+): on ok=True the response's top-level lease_s is the EFFECTIVE (post-clamp) duration actually granted -- always check it rather than assuming the requested value was honored. See get_bus_status's _meta.max_lease_seconds for the currently configured ceiling. Older bus servers (pre-v1.3) omit lease_s from the response entirely; its absence just means the bus predates the ceiling feature, not an error.

Release a coordination lane you hold. A 409 (held live by another owner) comes back as a clean ok=False conflict, not a crash.

Renew the lease on a coordination lane you hold live. A 409 (not held live by you) tells you to (re)claim instead of crashing. Like claim_lane, renewal is subject to the same server-side lease ceiling (coordination-bus v1.3+): on ok=True the response's top-level lease_s is the EFFECTIVE (post-clamp) duration actually granted, which may be shorter than requested -- check it rather than assuming the request was honored in full. See get_bus_status's _meta.max_lease_seconds for the currently configured ceiling. Older bus servers (pre-v1.3) omit lease_s from the response entirely; its absence just means the bus predates the ceiling feature, not an error.

Roll-up for the command-center panel: active lanes, orphaned/stale claims, recent messages, pending display-only action flags. Also exposes _meta.max_lease_seconds (coordination-bus v1.3+): the currently configured lease ceiling that claim_lane/heartbeat_lane requests get silently clamped to. Check this before claiming a lane for longer than the default if you need to know whether the request will actually be honored in full. Older bus servers (pre-v1.3) omit max_lease_seconds from _meta entirely; its absence just means the bus predates the ceiling feature, not an error.