codemode: execute hangs until eviction when a program awaits a promise nothing can settle #54340

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1. laurisvr

   added a commit that references this issue on Oct 10, 2026

   fix(codemode): fail a program that stalls instead of holding the turn

   ...

   This issue will close once commit cf2deba is merged into the 'dev' branch.

   cf2deba
2. opencode-agent commented on Oct 10, 2026

   

   opencode-agentBot

   on Oct 10, 2026 – with OpenCode Agent

   Contributor

   More actions

   Thanks for the clear report. I reproduced this with opencode-drive and the simulated model:

   1. The model calls execute with return 1. It returns at once (control).
   2. The model then calls execute with await new Promise(r => r)\nreturn 1.
   3. About 95 s later the execute row is still spinning, with no timeout or diagnostic. The only way out is interrupting the step.

   This happens on @opencode/cli 2.0.26 (your dev build isn't published, so I used the latest release) and still on the latest dev (7b3d4ce), run from source. The screenshots below show the step still running on each. Exporting a video failed on my side, so no recording is attached. The script below reproduces it.

   In the code, createCodeMode passes no limits, so the interpreter's timeout never applies. The interpreter also doesn't notice that nothing is left that could settle the awaited promise.

   Related: #54220 (no timeout for execute or plugin tool calls in general), PR #54299 (a shared tool timeout), and #51343 (the 60-minute inactivity eviction that eventually ends the step).

   

   

   Reproduction script (drive.ts)

   // Repro for #54340: a Code Mode `execute` program that awaits a promise nothing
   // can settle never finishes; there is no deadline or "deadlock" diagnostic.
   import { Effect } from "effect"
   import { Llm, OpenCodeDriver } from "opencode-drive"
   
   const WAIT_SECONDS = Number(process.env.WAIT_SECONDS ?? 90)
   
   export default OpenCodeDriver.use(
     {
       ...(process.env.OC_DEV ? { opencode: { dev: process.env.OC_DEV } } : {}),
       tui: { recording: true },
     },
     ({ llm, ui }) =>
       Effect.gen(function* () {
         // Control: a program that settles normally returns at once.
         yield* llm.queue(
           Llm.toolCall({ index: 0, id: "call_ok", name: "execute", input: { code: "return 1" } }),
           Llm.finish("tool-calls"),
         )
         yield* llm.queue(Llm.text("Control execute returned."))
         yield* ui.submit("Run return 1 with execute")
         yield* ui.waitFor("Control execute returned.")
         yield* ui.screenshot("control-done")
   
         // The report: awaiting a promise whose resolver is never called.
         yield* llm.queue(
           Llm.toolCall({
             index: 0,
             id: "call_hang",
             name: "execute",
             input: { code: "await new Promise(r => r)\nreturn 1" },
           }),
           Llm.finish("tool-calls"),
         )
         yield* ui.submit("Now run the never-settling promise with execute")
         yield* Effect.sleep("5 seconds")
         yield* ui.screenshot("hang-t5")
         yield* Effect.sleep(`${WAIT_SECONDS} seconds`)
         yield* ui.screenshot(`hang-t${WAIT_SECONDS + 5}`)
         const frame: any = yield* ui.capture()
         yield* Effect.log(
           "\n" + frame.lines.map((l: any) => l.spans.map((s: any) => s.text).join("")).join("\n"),
         )
         // Only way out is interrupting the whole step.
         yield* ui.press("escape")
         yield* ui.press("escape")
         yield* Effect.sleep("3 seconds")
         yield* ui.screenshot("after-interrupt")
       }),
   )

   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.
3. opencode-agent

   added

   reproduced

   on Oct 10, 2026
4. maxandron

   marked codemode: execute has no timeout — a never-resolving promise hangs a background subagent forever #56741 as a duplicate of this issue on Oct 18, 2026
5. rekram1-node

   closed this as completedin #57976on Oct 27, 2026