Reference

Protocol joymux.execution.v1

Opaque IDs: ClientId, SessionId, ExecutionId, LaneId, CheckpointId, EventCursor, CorrelationId.

Primary operations:

• client/register
• session/create|get|list|attach|detach|resize|close
• execution/start|get|interrupt|terminate|write
• events/subscribe|replay
• checkpoint/create|get|resume

Prefer structured argv:

{ "program": "cargo", "args": ["test", "--workspace"] }

JoyMux behavior must not branch on whether the client is named Codex, Claude, Gemini, or anything else.