mail-async

The mail-async skill presents a coherent, filesystem-based durable messaging channel suitable for controlled, single-host inter-agent communication. Its design emphasizes simplicity and persistence without networking, reflecting a benign utility in trusted environments. However, it lacks explicit security guarantees (encryption/authentication), robust delivery acknowledgments, and explicit locking semantics under high-concurrency, which could expose risks in multi-tenant or untrusted contexts. Overall, it aligns with its stated purpose but would benefit from explicit security and reliability enhancements if deployed beyond isolated or trusted systems.