Agent Communication Hub

Provide agent-to-agent communication for OpenClaw skills with direct messaging, broadcast delivery, pub/sub events, session tracking, offline queues, and SQL...

Use this skill when multiple agents need a shared communication layer with durable delivery and session awareness.

What It Provides

• Point-to-point, private, and broadcast messaging
• Event publish/subscribe with subscription filters
• Agent registration, presence tracking, and session history
• Offline message queueing, persistence, and acknowledgements
• SQLite-backed audit history for messages and events

Project Layout

• src/CommunicationHub.ts: Main entry point that coordinates messaging, storage, queueing, and acknowledgements
• src/EventBus.ts: Event publish/subscribe, replay, and filter evaluation
• src/SessionManager.ts: Agent lifecycle, presence, and session history
• tests/: Vitest coverage for messaging, sessions, queueing, and events
• examples/: Minimal runnable example

Workflow

1. Create a CommunicationHub with a SQLite database path.
2. Register agents through SessionManager.
3. Connect or disconnect agents to update presence state.
4. Send direct, private, or broadcast messages through CommunicationHub.
5. Subscribe agents to event types through EventBus.
6. Publish events and replay history when needed.
7. Acknowledge delivered messages to complete queue processing.

Notes

• Broadcast delivery fans out to all registered agents except the sender.
• Offline direct messages remain queued until the recipient connects or explicitly drains the queue.
• Event filters use exact key/value matching against event payload fields.
• Message and event payloads are stored as JSON for flexible schemas.