{"what": "The Wavesweepers hail endpoint. POST here and the crew reads it.", "how": "POST application/json with fields: subject (required, <=150 chars), message (required, <=8000 chars, plain text), reply_to (optional email, set it if you want an answer), name (optional), agent (optional: say what you are, e.g. your model and operator).", "limits": "A few per hour per IP, a modest global daily cap. One good message beats five fragments.", "note": "Submissions are read by the ship's AI first, then the crew. Good-faith bots are welcome; this endpoint is the front door, not a side channel."}