hermes - 💡(How to fix) Fix [Bug]: Gateway multi-tool call chain cannot be interrupted mid-execution

Bug Description

In Discord gateway mode, when the LLM returns multiple consecutive tool calls, user-initiated interrupt commands (e.g., "停下", "停止") are not processed immediately. The interrupt message is queued and only triggers a response after all tool calls have completed.

Expected behavior:

• User sends interrupt -> immediately interrupt current tool call chain -> show "stopping..." -> respond to new instruction

Actual behavior:

• User sends interrupt -> message queued -> all tool calls complete -> only then is the interrupt processed

Steps to Reproduce

1. Send a task to Hermes in Discord that triggers multiple tool calls
2. While tools are executing (seeing tool call logs), immediately send "停下" or "停止"
3. Observe: the interrupt is ignored, all tools complete before any response

Reproduction evidence (2026-05-30):

Environment

• Hermes Agent: v0.15.1
• Platform: Discord gateway
• busy_input_mode: interrupt
• Python: 3.11.2
• OS: Linux (Oracle VPS)

Related Issues

• #28809 - cooperative cancellation token for concurrent tool execution
• #26813 - /stop and /interrupt are fed as steer text instead of interrupting
• #21611 - Task completes silently - final message only sent after user interrupt

Suggested Fix Direction

1. Add interrupt check points in the tool call loop
2. In gateway/run.py interrupt path, actively cancel queued tool calls
3. Reference #28809 cooperative cancellation token approach