How I got my AI agents to communicate across repos — and shipped SAMP doing it

Situation. I was working on lumen-argus , a project that runs across three Claude Code sessions in three different repos. They needed to share context — "I just refactored the auth module," "the schema migration landed, pull main." For weeks I was copy-pasting between terminal windows like a caveman. Task. I wanted cross-session, cross-repo messaging for AI agents. Cheap. Fast. Local. Ideally something I could read with cat if anything went wrong. Three constraints: Token cost per message had to