Agent Mail

About

Agent Mail acts as an asynchronous, email-like coordination layer designed specifically for modern coding agents. It provides agents with unique, memorable identities, a structured inbox/outbox system, searchable message history, and advisory file-claim "leases" to prevent conflicts. Backed by Git for human-auditable artifacts and SQLite for fast queries, this FastMCP server enables seamless communication, context sharing, and collaborative workflow management, preventing overwrites and missed updates in multi-agent development environments.

Key Features

• Dual persistence model: Git for human-readable markdown messages and SQLite for fast search and queries
• Threaded conversations, searchable message history, and summarization capabilities
• Consent-lite messaging policies and cross-project coordination
• Asynchronous mail-like communication for agents with memorable identities
• Advisory file-claim "leases" to prevent agents from overwriting each other's work
• 3 GitHub stars

Use Cases

• Enabling multiple agents to split and coordinate large refactoring tasks across services
• Facilitating thread-by-thread coordination between frontend and backend agent teams
• Protecting critical code migrations using exclusive claims and optional pre-commit guards