multAIplayer CLI contributor guide

The multAIplayer command-line client is a second interface to the same encrypted rooms used by the desktop app. It is not a remote shell or a separate protocol implementation.

Start with:

• User installation and quickstart
• CLI architecture and security boundaries
• CLI and desktop release boundaries
• CLI packaging and publication
• Project threat model
• Codex app-server compatibility

The CLI is an independent Rust workspace under apps/cli with its own manifest, lockfile, tests, version, and release artifacts. Changes to shared protocol, MLS, or Codex-host behavior must continue to pass both CLI and desktop tests. Git history and pull requests are the implementation record; this directory contains only maintained contributor guidance.