hermes - 💡(How to fix) Fix Discord: @mention from mobile client not recognized (bot does not respond)

Bug Description

When using the Discord mobile app and tagging the bot with @BotName, the bot does not respond. The same @BotName mention works correctly on the Discord web client. DMs to the bot work on both platforms.

Steps to Reproduce

1. Have discord.require_mention: true set in config (default)
2. Open Discord on a mobile device (iOS or Android)
3. In a server channel, type @BotName hello — selecting the bot from the autocomplete dropdown
4. Bot does not respond
5. Repeat same message from Discord web — bot responds correctly

Expected Behavior

Bot should respond to @mention on both web and mobile clients.

Actual Behavior

Bot ignores messages from mobile. Only DMs work on mobile.

Root Cause (suspected)

The on_message handler in gateway/platforms/discord.py checks self._client.user in message.mentions to detect a mention. On some mobile clients, the resolved message.mentions list may be empty even when the user types a proper @mention from the autocomplete, possibly due to a timing or payload difference in how the Discord mobile app sends the message.

Workaround

Adding a plain-text fallback check for @BotName / @display_name at the start of message.content in _handle_message() resolves the issue.

Environment

• Platform: Discord (mobile — iOS/Android)
• Hermes Gateway: latest
• discord.require_mention: true
• discord.auto_thread: true

<img width="689" height="114" alt="Image" src="https://github.com/user-attachments/assets/0909d384-bf28-47d1-be42-89b51799f224" />