web: main agent does not surface running or stuck subagents #51113

Activity

1. reisi007 commented on Oct 5, 2026

   

   reisi007

   on Oct 5, 2026

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   Follow-up on 2.0.23 (remote-code, opencode serve): the subagents overview is now completely gone from the session details, not just the main-view indicator.

   Environment

   • opencode version: 2.0.23 (serve, PID 1, /usr/local/bin/opencode serve --hostname 0.0.0.0 --port 8080; update API also reports 2.0.23 as latest)
   • OS: Linux 5.14.0-687.53.1.el9_8.x86_64 (linux x64, container)
   • Terminal: xterm-256color
   • Shell: /bin/bash
   • Install/channel: latest
   • Active plugins: none found in config

   Reproduction

   1. Open the OpenCode web UI on the remote host and open a parent session that has child sessions (e.g. a session that launched general subagents).
   2. Check the session details view for an overview/list of child sessions.
   3. Compare with the API: GET /api/session?parentID=<parent-ses-id> returns the children (verified: 20 children for one parent, agents general).

   Expected Behavior

   Session details should show a total overview of the session's subagents (children), without having to guess via timeline filters.

   Actual Behavior

   No children overview in the session details. The shipped web bundle (2.0.23) has no /subagents route — only the child-session view (session.child.backToParent), the running indicator ({{count}} running, Interrupt subagent), and the timeline category subagents. Timeline preset was checked and is not the cause.

   Additional Context

   • API proof (serve, authenticated): GET /api/session?parentID=ses_... → 20 items with parentID set; GET /api/session/active works.
   • Consistent on 2.0.23, not intermittent.
   • Workaround: query the API directly with parentID.
2. reisi007 commented on Oct 7, 2026

   

   reisi007

   on Oct 7, 2026

   Last edited by reisi007

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   Correction to my follow-up above: on desktop the subagents are shown next to the session title; the mobile view does not show them there. I amended the issue body accordingly (mobile scope + mobile repro step). Backend is fine on 2.0.23 — GET /api/session?parentID=<parent> still returns the children.
3. PestoAddict commented on Oct 7, 2026

   

   PestoAddict

   on Oct 7, 2026

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   Data point for 2.0.23: a wedged subagent never surfaced to the parent.

   The parent's subagent tool call was backgrounded. The child session then stayed in running for 68 min (86 s of actual model time) and no completion or failure notification ever reached the parent — the parent only found out when the user asked about the delay.

   Root cause of the wedge was a failed drain with an upstream provider error (AI.Error: Upstream request failed ...), see #50775. The child was wedged and could not report anything itself, so only the parent or the client could have noticed; neither did. /api/session/active did show the session as running with frozen tokens.output the whole time, so the signal was available if something had been watching it.
4. RateteDev commented on Oct 15, 2026

   

   RateteDev

   on Oct 15, 2026

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   Can reproduce on the mobile web UI (Android Chrome, 2.0.26): with the main session open there is no running indicator next to the title, and the subagent session page has no stop control either, so there is no way to stop a background subagent from a phone — I had to stop it via the API. Desktop width works as described, so this looks like a mobile-layout gap.
5. opencodejr commented on Oct 28, 2026

   

   opencodejrBot

   on Oct 28, 2026

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   Thanks for the report, @reisi007! You're asking for the main session view to show, on mobile as well, when subagents are still running or might be stuck, so you don't have to open the subagents page to find out.

   Version 2.0.16 had no such indicator in the main view. Newer versions (v2.2.0 and later) have a background-activity capsule above the composer in the parent session. It lists running subagents and background shells, and you can open or stop each one from there. It can be turned on or off with the background activity setting in Settings → General. Could you update and check whether it covers your case on mobile too? If something is still missing, for example a clear sign that a subagent is stuck rather than just running, please reply here and maintainers will consider it.

   Related issues:

   • Desktop: running-subagents indicator never shows nested subagents (subagent_depth > 1) #58489: the running-subagents indicator doesn't show nested subagents
   • web: session icon shows no progress indicator while a background shell runs #56660: no progress indicator while a background shell runs