What is a Private Room?
The same live editor as Code Share, with a door on it. It is for the review, the incident or the interview where a link should not be enough: a config with hostnames in it, a draft you want to talk through before it spreads, a snippet for one colleague. There are still no accounts; the PIN is the whole ceremony.
How private is it?
The PIN is hashed with scrypt and compared in constant time, guesses are rate-limited per room, and the server never sends the room's contents to a visitor who has not unlocked it. What it does not do is encrypt the content end to end: the server holds the text so it can sync it between editors, and it is deleted when the room expires (30 minutes to 24 hours, your choice). Treat it like a locked meeting room, not a safe.
Moving from Config Share
Config Share, which masked likely secrets in a pasted file, has been replaced by private rooms. Existing Config Share links keep working until they expire. If you only need to send a config once, Log Share still highlights JSON, YAML and .env files and expires on its own.