Inter-agent communication via tmux with permission gates, chalkboard + short-paste protocol (Grok/AGY-hardened). MUST declare sender session and REPLY_TO session on every message. MUST verify delivery by inspecting the target tmux session (capture-pane). Use when messaging another AI agent in tmux, board-room/swarm chat, or when the user asks to talk to another agent. Updated 2026-07-19 (mandatory pane verification).
