feat: support per-channel ackReaction config (#17092) (thanks @zerone0x)

docs/channels/discord.md

@@ -313,6 +313,23 @@ See [Slash commands](/tools/slash-commands) for command catalog and behavior.
 
   </Accordion>
 
+  <Accordion title="Ack reactions">
+    `ackReaction` sends an acknowledgement emoji while OpenClaw is processing an inbound message.
+
+    Resolution order:
+
+    - `channels.discord.accounts.<accountId>.ackReaction`
+    - `channels.discord.ackReaction`
+    - `messages.ackReaction`
+    - agent identity emoji fallback (`agents.list[].identity.emoji`, else "👀")
+
+    Notes:
+
+    - Discord accepts unicode emoji or custom emoji names.
+    - Use `""` to disable the reaction for a channel or account.
+
+  </Accordion>
+
   <Accordion title="Config writes">
     Channel-initiated config writes are enabled by default.
 

docs/channels/slack.md

@@ -287,6 +287,22 @@ Available action groups in current Slack tooling:
 - `channel_id_changed` can migrate channel config keys when `configWrites` is enabled.
 - Channel topic/purpose metadata is treated as untrusted context and can be injected into routing context.
 
+## Ack reactions
+
+`ackReaction` sends an acknowledgement emoji while OpenClaw is processing an inbound message.
+
+Resolution order:
+
+- `channels.slack.accounts.<accountId>.ackReaction`
+- `channels.slack.ackReaction`
+- `messages.ackReaction`
+- agent identity emoji fallback (`agents.list[].identity.emoji`, else "👀")
+
+Notes:
+
+- Slack expects shortcodes (for example `"eyes"`).
+- Use `""` to disable the reaction for a channel or account.
+
 ## Manifest and scope checklist
 
 <AccordionGroup>

docs/channels/telegram.md

@@ -571,6 +571,23 @@ curl "https://api.telegram.org/bot<bot_token>/getUpdates"
 
   </Accordion>
 
+  <Accordion title="Ack reactions">
+    `ackReaction` sends an acknowledgement emoji while OpenClaw is processing an inbound message.
+
+    Resolution order:
+
+    - `channels.telegram.accounts.<accountId>.ackReaction`
+    - `channels.telegram.ackReaction`
+    - `messages.ackReaction`
+    - agent identity emoji fallback (`agents.list[].identity.emoji`, else "👀")
+
+    Notes:
+
+    - Telegram expects unicode emoji (for example "👀").
+    - Use `""` to disable the reaction for a channel or account.
+
+  </Accordion>
+
   <Accordion title="Config writes from Telegram events and commands">
     Channel config writes are enabled by default (`configWrites !== false`).
 

docs/gateway/configuration-reference.md

@@ -1238,6 +1238,8 @@ Variables are case-insensitive. `{think}` is an alias for `{thinkingLevel}`.
 ### Ack reaction
 
 - Defaults to active agent's `identity.emoji`, otherwise `"👀"`. Set `""` to disable.
+- Per-channel overrides: `channels.<channel>.ackReaction`, `channels.<channel>.accounts.<id>.ackReaction`.
+- Resolution order: account → channel → `messages.ackReaction` → identity fallback.
 - Scope: `group-mentions` (default), `group-all`, `direct`, `all`.
 - `removeAckAfterReply`: removes ack after reply (Slack/Discord/Telegram/Google Chat only).