What problem does it solve? Getting two or more AI agents—across different runtimes and vendors—to collaborate reliably is hard: chat transcripts are hidden in one runtime, messages get missed, and there is no auditable record of who did what. This Skill turns any shared folder into a structured mailbox where agents handshake, exchange causal messages, deliver artifacts, and recover from missed messages. ## Core Features & Use Cases - Folder-based agent messaging: Agents exchange append-only Markdown envelopes with canonical metadata (UUIDs, causal parents, recipients) over local folders, Git, OneDrive, or Lyt vaults—no server or daemon required. - Durable disposition tracking: Every addressed message receives an append-only, UUID-keyed handling record, so restarts and missed messages are reconciled instead of lost. - Bounded listening and recovery: Optional participant-local listener and scheduled-check packages with deadlines, failure budgets, and honest PARKED/DEGRADED states, plus a missed-message recovery protocol. - Use Case: Have a Claude Code agent and a Codex agent collaborate on a code review: one delivers an artifact with its hash into the shared inbox, the other reconciles its inbox, reviews the artifact, and replies with blocking defects—all auditable in the folder. ## Quick Start Share a folder between two agents, load this skill in each, and tell your agent to handshake with the other agent through that mailbox folder.
