SAMP: Zero-Cost Messaging Protocol for Coordinating AI Agents Across Repositories

As developers manage multiple AI agent sessions across separate projects, sharing context and coordinating work has traditionally required expensive server infrastructure or wasteful token consumption. SAMP addresses this with a lightweight, vendor-neutral protocol based on append-only file logs and content-addressed IDs—borrowing git's proven design to eliminate both infrastructure overhead and synchronization conflicts. By operating entirely offline with zero token cost for command-line usage, it transforms multi-agent workflows from manual copy-pasting into seamless, scalable coordination.