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🦀 ClawHub

A2A Chatting

by @saullockyip

Enable communication, coordination, and information exchange between OpenClaw agents through controlled multi-agent chat sessions.

Versionv0.4.0

Downloads1,091

#legal

View on ClawHub →

TERMINAL

clawhub install a2a-chatting

📖 About This Skill

name: A2A Chatting description: Manage A2A sessions with other OpenClaw agents. Use when: (1) User asks you to talk to another agent, (2) You need to query another agent's capabilities or get information from them, (3) You need to coordinate with another agent, (4) User wants agent-to-agent communication. version: 0.4.0

A2A Chatting

Manage sessions with other OpenClaw agents. Messaging is done via the built-in sessions_send tool, not via the CLI. This CLI only handles session lifecycle (create, list, view, delete).

Message Format (Required)

When sending A2A messages via sessions_send, you must use this exact format:

[From: ] [fromAgentId: ] [reply-to: ]

For notifications (no reply needed):

[From: ] [fromAgentId: ] [DO NOT REPLY]

Example — ask Anna to do something:

[From: Lewis] [fromAgentId: echi-ceo] [reply-to: ] 早上好，请更新本周销售报告。

Example — notify Victor (no reply needed):

[From: Lewis] [fromAgentId: echi-ceo] [DO NOT REPLY] 会议已延期到下午3点。

Fields explained:

From — Human-readable name of the sender

fromAgentId — The agent ID (e.g. echi-ceo, echitech-sales-manager-victor)

reply-to — Your own sourceSession (so the receiver knows where to route replies)

DO NOT REPLY — Use when no response is needed (fire-and-forget)

Prerequisites

Configure the OpenClaw directory:

a2a-chatting.sh config 
Example: a2a-chatting.sh config /Users/roco/.openclaw

CLI Commands

| Command | Description | |---------|-------------| | config [--force] | Configure OpenClaw directory | | get-agents | List all available agents with their IDs | | new-session | Create a new A2A session with an agent | | list-sessions | List all A2A sessions | | get-session | Show session info | | delete-session | Delete a session |

Workflow

Step 1: Create a Session

# Use the CLI to create a session with the target agent
a2a-chatting.sh new-session  "Discuss project structure"
Returns: Session ID (e.g. 30d53db1-d1fd-41d8-a7f3-8373aa58a840)

Step 2: Send Message (via sessions_send)

# Use sessions_send tool with the format above:
sessions_send(
  sessionKey: "",
  message: "[From: Lewis] [fromAgentId: echi-ceo] [reply-to: ] 早上好，请更新本周销售报告。"
)

Step 3: Receive Reply

The receiver's reply automatically routes back to your session via sessions_send source tracking.

Tips

Session Reuse: Reuse existing sessions for ongoing conversations — agents maintain context

Topic Naming: Use descriptive topics so you can find sessions later with list-sessions

Format Strictly: Always use the [From: ...] format — it identifies you in multi-agent conversations

reply-to vs DO NOT REPLY: Only use reply-to when you need a response. Use DO NOT REPLY for notifications.

Examples

Create session with Anna

a2a-chatting.sh new-session echitech-marketing-manager-anna "Marketing sync"
→ Session ID: db4aaf45-dd47-4766-87d0-0c2f690e8797

Send a task request

sessions_send(
  sessionKey: "agent:echitech-marketing-manager-anna:main",
  message: "[From: Lewis] [fromAgentId: echi-ceo] [reply-to: ] 请更新本周营销计划。"
)

Send a notification (no reply)

sessions_send(
  sessionKey: "agent:echitech-sales-manager-victor:main",
  message: "[From: Lewis] [fromAgentId: echi-ceo] [DO NOT REPLY] 今晚8点有全员会议，请准时参加。"
)

Storage

Session index: /a2a-sessions/sessions.jsonl

💡 Examples