THERMOGRAPH_DISCORD_BOT_MENTIONS=0 makes the gateway bot silent on guild
mentions. Default on, and unset counts as on, so every env file that predates
the knob behaves exactly as before.
The reason is a second responder. The operator's desktop now runs a
conversational agent that replies as this same bot account (discord-voice-bot,
AGENTS.md) and grades through the same API we do, so with both live a single
"@Thermograph Phoenix" gets answered twice — once as a card, once as a reply.
Only one of us can own that surface, and the agent is the one that can also hold
a conversation.
Scoped to guild mentions on purpose. DMs stay here: the agent polls guild
channels only, so staying silent in a DM would just drop the message. And
/grade is a signed HTTP interaction that never touched this path, so it keeps
answering from prod while the desktop is asleep — which is what stops this from
trading an always-on surface for a sometimes-on one.
Claude-Session: https://claude.ai/code/session_015Z1ebLbhUxeZ9ozpNrVTCP
