Cross Agent Filesystem Exchange

This skill should be used when building or debugging a file-based mailbox channel between Claude Code and another self-hosted agent on the same host (OpenClaw/Olu, Hermes/Chuka, or a future one) — one-way inboxes, numbered entry files, per-side STATE.md, an auto-archive/notify timer, and a self-initiated polling mechanism so the other agent picks up new messages without Will manually relaying them. Built and verified twice with reconciled differences: `dfw` (Claude Code <-> Olu/OpenClaw, 2026-08-23, several real bugs found and fixed) and `hermes` (Claude Code <-> Chuka/Hermes, 2026-09-01, ported the settled dfw design plus native monitor-script polling). Trigger phrases include "agent exchange channel", "agent mailbox", "cross-agent filesystem channel", "to-claude inbox", "STATE.md status done", "auto-archive both sides done", "hermes cron monitor-script", "monitor output unchanged suppressing agent run", "no systemd sandbox one-way boundary", "ProtectSystem ReadWritePaths ping-pong channel", "agent polling cron blind spot", "second agent mailbox".

mkdir -p ~/.claude/skills/cross-agent-filesystem-exchange
curl -L https://claudskills.com/skills/cross-agent-filesystem-exchange/SKILL.md \
  -o ~/.claude/skills/cross-agent-filesystem-exchange/SKILL.md

@misc{cross-agent-filesystem-exchange-2026,
  author    = {jackson2w},
  title     = {Cross Agent Filesystem Exchange [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/cross-agent-filesystem-exchange/}
}