Reactions

The agent can add and remove emoji reactions on messages using the

tool with the action. Reaction behavior varies by channel and transport.

How it works

json
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{
  "action": "react",
  "messageId": "msg-123",
  "emoji": "thumbsup"
}

• text

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  emoji
  is required when adding a reaction.
• Set
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  emoji
  to an empty string (
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  ""
  ) to remove the bot's reaction(s).
• Set
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  remove: true
  to remove a specific emoji (requires non-empty
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  emoji
  ).

Channel behavior

Discord and Slack

Google Chat

Telegram

WhatsApp

Zalo Personal (zalouser)

Feishu/Lark

Signal

Reaction level

Per-channel

config controls how broadly the agent uses reactions. Values are typically , , , or .

• Telegram reactionLevel —
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  channels.telegram.reactionLevel
• WhatsApp reactionLevel —
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  channels.whatsapp.reactionLevel

Set

on individual channels to tune how actively the agent reacts to messages on each platform.

Related

• Agent Send — the
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  message
  tool that includes
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  react
• Channels — channel-specific configuration