Build got stuck for 6h after delegating to explore subagent #23296

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1. kenorb

   added

   bugSomething isn't workingSomething isn't working

   on Apr 18, 2026
2. github-actions

   assigned

   rekram1-node

   on Apr 18, 2026
3. github-actions

   added

   coreAnything pertaining to core functionality of the application (opencode server stuff)Anything pertaining to core functionality of the application (opencode server stuff)

   perfIndicates a performance issue or need for optimizationIndicates a performance issue or need for optimization

   on Apr 18, 2026
4. github-actions commented on Apr 18, 2026

   

   github-actionsBot

   on Apr 18, 2026 – with GitHub Actions

   Contributor

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   This issue might be a duplicate of existing issues. Please check:

   • OpenCode Github Agent Stuck! #4672: OpenCode Github Agent Stuck! (same environment: GitHub Actions runner, agent getting stuck)
   • Explore subagent hangs indefinitely with Anthropic Claude Opus 4.6 -- no timeout or recovery #13841: Explore subagent hangs indefinitely — no timeout or recovery (directly matches: build hangs after delegating to explore subagent)
   • Tasks/Subagents with Codex / OpenAI are frequently getting stuck with no timeout/retry, which then hangs the session forever #11865: Tasks/Subagents frequently getting stuck with no timeout/retry (same core symptom: hang after subagent delegation with no recovery)
   • Sessions hang indefinitely when Task tool spawns subagents via REST API (opencode serve) #6573: Sessions hang indefinitely when Task tool spawns subagents (same pattern: parent session stuck after spawning subagent)

   If your issue is distinct from all of the above, please add details explaining how it differs.
5. thdxr

   removed

   bugSomething isn't workingSomething isn't working

   perfIndicates a performance issue or need for optimizationIndicates a performance issue or need for optimization

   coreAnything pertaining to core functionality of the application (opencode server stuff)Anything pertaining to core functionality of the application (opencode server stuff)

   on May 3, 2026
6. thdxr

   assigned

   kitlangton

   and unassigned

   rekram1-node

   on May 3, 2026
7. gf-mse commented on Jun 20, 2026

   

   gf-mse

   on Jun 20, 2026

   Last edited by gf-mse

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   I observe something similar with opencode 1.14.x - 1.17.x (current) -- after explore agent finishes, the build agent keeps showing a spinner and never finishes (for 1-5 hours or longer -- until killed by a custom watchdog script).

   Since the LLM is served locally by llama.cpp, I can see that there's no LLM activity, so it's a hang.

   Setup : a Debian Linux docker container running opencode, working with a local llama.cpp server serving a qwen3.6 instruct model.

   Task: opencode is invoked by by a script which traverses a tree of library modules, one call per each module; there is a "master" opencode session listening at a port, and the run session attach to it to do work; the idea is that it is possible to do an opencode attach -c to the same server and see what the current run process is doing.

   Sadly sometimes the run session hangs, and it is most annoying when it can not basically get past a specific module, so restarting the task does not help as it keeps getting stuck at the same spot.

   I was trying various workarounds, e.g. starting a new opencode process for each task, but it did not help much.

   So yes, seems like there's a bug and yes, a sub-agent timeout setting (15080) would likely help a lot.
8. github-actions commented on Aug 20, 2026

   

   github-actionsBot

   on Aug 20, 2026 – with GitHub Actions

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   To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.
9. github-actions

   closed this as not plannedon Aug 20, 2026