Rank, 14 days: 137 on the Claude Code sheet
2 people reported

All time, since Oct 24.

Subagent not woken by completion

“It stayed idle for about 11 hours, until the main session sent it a message with SendMessage.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/claude-code/issues/20913/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Idle background subagent never woken by its own background command finishing. A subagent that ends its turn to wait on its own run_in_background command stays idle after the command exits, and nothing signals the stall.

Is this your bug?

File my report
Where
Background subagents
Versions
2.1.309 to 2.1.319
Platforms
Linux, macOS
How bad
Breaks a normal workflow.

Not quite your bug?

  1. Resumed subagent report not delivered2 people
  2. Teammate subagent handback fails6 people
  3. Headless run kills running background subagents yet exits success2 people

Original reports2, newest first

  1. Idle background subagent isn't woken when its own run_in_background command finishes#108836
  2. Background subagent's own run_in_background Bash completion notification never delivered; agent idles forever#104789

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