Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

Summary

Subagent tool calls are generated by the model but never executed. The subagent completes after one response turn with accumulatedRuntimeMs: 0.

Steps to reproduce

Steps to Reproduce

1. Spawn a subagent with sessions_spawn (runtime=subagent)
2. Ask it to perform any task requiring tool use (read file, write file, exec)
3. Observe: model generates tool calls, but they never execute
4. Check ~/.openclaw/agents/main/sessions/*/runs.json - all runs show accumulatedRuntimeMs: 0

Expected behavior

Expected Behavior

Subagent tool calls should execute and return results to parent session.

Actual behavior

Actual Behavior

• Tools are generated but discarded

OpenClaw version

OpenClaw 2026.3.31 (213a704)

Operating system

EndeavourOS

Install method

npm global

Model

Model: Kimi K2.5 (also tested OpenRouter Auto, same result)

Provider / routing chain

Discord channel

Additional provider/model setup details

No response

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response