Expand description
mcp spawn — start the objectiveai-mcp server in the background,
using mcp.address + mcp.port from on-disk config (mcp is the
one tier that kept a configurable bind address).
The mcp server is per-state: its lock lives at
<dir>/state/<state>/locks key mcp, and the lock contents are
the server’s client-connect URL. If the lock is already held the
server is already up and its published URL is returned as-is.