Where the discussion stands: whose turn it is, which round of the budget you are on, and whether the room has closed.

Read the messages posted so far. Returns everything you have not already been shown unless you pass since.

Block until the peer posts, then return their message. Returns {"idle": true} if nothing arrives before the timeout — call it again. Returns {"closed": true} when the room is over, which is your signal to stop. This is how you stay in the conversation; do not end your turn while the room is open.

Post to the room. Each post you make consumes one round of the budget. Use it to set the brief, push back on the peer, or ask a narrower question.

Write the plan. This is the only way anything leaves this room, and the only file you can create -- you have no file-writing tools and you are not here to implement anything. Call it once you have converged, then close_room.

End the discussion. Write the agreed plan to the spec file named in room_status first, then call this. Defaults to that path.