GSD Subagent Execution Timeout and Stall

[Jain2098]

I am experiencing a stall during execution. The main GSD agent spawns a subagent, but the subagent hangs entirely without returning any output.

The main agent waits, receives no checkpoints or completion signals, and eventually hits the 10-minute stall threshold, forcing an interruption to protect the shared checkout.

Logs:

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  GSD ► EXECUTING WAVE 1
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  [checkpoint] phase 02 wave 1/3 starting, 1 plan, 0/3 plans done

  ◆ Spawning the Wave 1 executor… (runs in a subagent — no output until it returns, ~1–5 min; expected, not a freeze)
• Started `/root/phase2_wave1`
• Waiting for agents
• Finished waiting
  └ No agents completed yet
───────────────────────────────────────────────────────

• Wave 1 is still executing the database alteration and Supervisor contract. I’m waiting for its committed summary before starting the dependent  worker plan.
• Waiting for agents
• Finished waiting
  └ No agents completed yet
• Waiting for agents
• Finished waiting
  └ No agents completed yet
• Waiting for agents
• Finished waiting
  └ No agents completed yet
───────────────────────────────────────────────────────
• Wave 1 remains active. Its scope includes the only required schema change, so Wave 2 cannot safely begin until the executor confirms that the development database and API contract are aligned.
• Waiting for agents
• Finished waiting
  └ No agents completed yet
• Waiting for agents
• Finished waiting
  └ No agents completed yet
──────────────────────────────────────────────────
• Wave 1 is still running, with no checkpoint or failure signal. I’ll continue waiting rather than inspect or modify its in-progress files.
• Waiting for agents
• Finished waiting
  └ No agents completed yet
• Waiting for agents
• Finished waiting
  └ No agents completed yet
• Waiting for agents
• Finished waiting
  └ No agents completed yet
• Waiting for agents
• Finished waiting
  └ No agents completed yet
───────────────────────────────────────────────────────
• The executor has exceeded the configured 10-minute stall threshold without returning a completion or checkpoint. I’m pausing the phase to avoid overlapping work on the shared checkout.
• Interrupted `/root/phase2_wave1`
───────────────────────────────────────────────────────
• ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  GSD ► EXECUTING WAVE 1
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  Phase 2 is paused: the Wave 1 executor exceeded its 10-minute stall threshold without a completion or checkpoint. I interrupted it to prevent  concurrent edits on the shared checkout.

  Please choose how to proceed:
  1. Retry Wave 1.
  2. Execute it inline.
  3. Inspect the partial work first. 

Questions:

1. Is there a known issue with the subagent hanging silently like this?
2. Could there be a hidden interactive prompt or a lock blocking the subagent from proceeding?
3. How can I increase the logging verbosity of the subagent to see exactly what command it is hanging on before the timeout occurs?