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openclaw - 💡(How to fix) Fix [Feature]: Support MESSAGE_UPDATE for new @mention detection [1 comments, 2 participants]

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openclaw/openclaw#48894•Fetched 2026-04-08 00:51:22
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When a Discord message is posted without an @mention and then edited to add one, the mentioned agent is never triggered. OpenClaw only processes MESSAGE_CREATE events — MESSAGE_UPDATE with newly added @mentions is silently ignored.

Expected behaviour: If a user edits a message to add a bot @mention that wasn't in the original, OpenClaw should detect the new mention and trigger the agent session, same as if a new message were posted.

Workaround: Post a new message with the @mention instead of editing.

Context: In a multi-agent Discord workspace with requireMention: true and allowBots: true, this causes pipeline stalls when a user/agent forgets to @mention on the original message and edits to add it — the agent never responds and the user has to realise why.

OpenClaw 2026.3.13

Root Cause

When a Discord message is posted without an @mention and then edited to add one, the mentioned agent is never triggered. OpenClaw only processes MESSAGE_CREATE events — MESSAGE_UPDATE with newly added @mentions is silently ignored.

Expected behaviour: If a user edits a message to add a bot @mention that wasn't in the original, OpenClaw should detect the new mention and trigger the agent session, same as if a new message were posted.

Workaround: Post a new message with the @mention instead of editing.

Context: In a multi-agent Discord workspace with requireMention: true and allowBots: true, this causes pipeline stalls when a user/agent forgets to @mention on the original message and edits to add it — the agent never responds and the user has to realise why.

OpenClaw 2026.3.13

Fix Action

Fix / Workaround

Workaround: Post a new message with the @mention instead of editing.

RAW_BUFFERClick to expand / collapse

Summary

When a Discord message is posted without an @mention and then edited to add one, the mentioned agent is never triggered. OpenClaw only processes MESSAGE_CREATE events — MESSAGE_UPDATE with newly added @mentions is silently ignored.

Expected behaviour: If a user edits a message to add a bot @mention that wasn't in the original, OpenClaw should detect the new mention and trigger the agent session, same as if a new message were posted.

Workaround: Post a new message with the @mention instead of editing.

Context: In a multi-agent Discord workspace with requireMention: true and allowBots: true, this causes pipeline stalls when a user/agent forgets to @mention on the original message and edits to add it — the agent never responds and the user has to realise why.

OpenClaw 2026.3.13

Problem to solve

Prevents pipeline pausing if the @mention is only added on edit message rather than create. I have improved gaurdrails and discipline with agents to prevent the issue locally however it feels as if this should be fixed to work alongside Discord native edit message function where @mentions can be added after new.

Proposed solution

OpenClaw should detect the new mention and trigger the agent session, same as if a new message were posted.

Alternatives considered

No response

Impact

Minor, just annoying.

Evidence/examples

No response

Additional information

No response

extent analysis

Fix Plan

To fix the issue, we need to modify OpenClaw to process MESSAGE_UPDATE events and trigger the agent session when a new @mention is added. Here are the steps:

  • Update the event listener to include MESSAGE_UPDATE events
  • Check if the updated message contains a new @mention that was not present in the original message
  • If a new @mention is found, trigger the agent session

Example Code

import discord

# Update the event listener to include MESSAGE_UPDATE events
@client.event
async def on_message_update(before, after):
    # Check if the updated message contains a new @mention
    new_mentions = [mention for mention in after.mentions if mention not in before.mentions]
    if new_mentions:
        # Trigger the agent session
        await trigger_agent_session(after)

# Trigger the agent session
async def trigger_agent_session(message):
    # Get the agent associated with the @mention
    agent = get_agent(message.mentions[0])
    # Trigger the agent session
    await agent.trigger_session(message)

Verification

To verify that the fix worked, test the following scenarios:

  • Edit a message to add a new @mention and verify that the agent session is triggered
  • Edit a message to remove an @mention and verify that the agent session is not triggered
  • Edit a message to add multiple new @mentions and verify that the agent sessions are triggered correctly

Extra Tips

  • Make sure to update the event listener to include MESSAGE_UPDATE events and handle the new @mention detection logic correctly.
  • Test the fix thoroughly to ensure that it works as expected in different scenarios.

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openclaw - 💡(How to fix) Fix [Feature]: Support MESSAGE_UPDATE for new @mention detection [1 comments, 2 participants]