session: first-turn subtask command leaves parent session empty and untitled #52468

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1. github-actions

   assigned

   jlongster

   on Oct 1, 2026
2. github-actions commented on Oct 1, 2026

   

   github-actionsBot

   on Oct 1, 2026 – with GitHub Actions

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

   • Custom commands don't appear in message history #3161: Custom commands using subtask: true make the request disappear from message history.
   • fix(tui): /review creates empty user bubble (input hidden in UI) #29685: Subtask slash commands can render as empty user messages even though the command continues.
3. opencodejr commented on Oct 28, 2026

   

   opencodejrBot

   on Oct 28, 2026

   Contributor

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   Thanks for the detailed report. I was able to reproduce this on 2.0.21 in the TUI with a simulated model, and it still happens on the latest dev (891a020bc).

   Steps: a project command with agent: build and subtask: true, a new session switched to Plan, then /impeccable some arguments as the first input.

   While the subagent runs, the parent session matches what you saw:

   • title is empty.
   • There are no session_message rows.
   • session_inbox holds one synthetic row containing only the Plan-mode system-reminder.
   • The TUI shows an empty "New session" with only "1 subagent" in the footer.

   The child session is fully populated and runs normally.

   Once the child finishes, the parent does get the reminder, a subagent-completed notification and an assistant reply. But your typed command is never stored in the parent, and the session is never titled.

   The recording and screenshot below show it, and the script below reproduces it.

   recording.mp4

   

   Reproduction script (drive.ts)

   // Repro for #52468: a subtask command as the first input leaves the parent session empty.
   import { Effect, Stream } from "effect"
   import { Llm, OpenCodeDriver } from "opencode-drive"
   
   export default OpenCodeDriver.use(
     {
       ...(process.env.OC_DEV ? { opencode: { dev: process.env.OC_DEV } } : {}),
       tui: { recording: true },
       project: {
         git: true,
         files: {
           ".opencode/commands/impeccable.md":
             "---\ndescription: Impeccable subtask\nagent: build\nsubtask: true\n---\nSay hello and handle $ARGUMENTS.\n",
         },
       },
     },
     ({ ui, llm }) =>
       Effect.gen(function* () {
         yield* llm.serve(() => Stream.make(Llm.pause(20000), Llm.text("CHILD-REPLY: hello from the subagent")))
         yield* Effect.sleep(1500)
         yield* ui.press("tab", { shift: true })
         yield* Effect.sleep(800)
         yield* ui.screenshot("home-plan")
         yield* ui.type("/impeccable some arguments")
         yield* Effect.sleep(800)
         yield* ui.screenshot("typed")
         yield* ui.enter()
         yield* Effect.sleep(8000)
         yield* ui.screenshot("while-subagent-runs")
         yield* Effect.sleep(20000)
         yield* ui.screenshot("after-subagent-finished")
       }),
   )

   Run it with opencode-drive: opencode-drive run ./drive.ts. It drives opencode from your PATH; set OC_DEV to the path of an OpenCode checkout to run that from source instead.
4. opencodejr

   added

   reproduced

   on Oct 28, 2026