OpenAI Chat tool call delta is missing id or name #52700

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1. github-actions

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   nexxeln

   on Oct 2, 2026
2. github-actions

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   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

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

   

   github-actionsBot

   on Oct 2, 2026 – with GitHub Actions

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   This issue doesn’t fully meet our contributing guidelines.

   What needs to be fixed:

   • Please use the Bug Report template and include a Description with enough context to reproduce the error, including what action or prompt triggers it.
   • Add relevant system details such as your OpenCode version, operating system, and terminal.

   Please edit this issue to address the above within 72 hours, or it will be automatically closed.

   ---

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

   • provider: fledge-alpha-free returns finish_reason "tool_calls" without tool_calls delta #52691: Reports the same error with fledge-alpha-free and describes a final tool_calls chunk with no tool-call delta.
   • Tool call streaming fails with 'missing id or name' on OpenAI-compatible APIs that send empty-string deltas #37841: Reports the same error for OpenAI-compatible tool-call streaming with empty id/name deltas.

   If you believe this was flagged incorrectly, please let a maintainer know.
4. Taliyaha commented on Oct 2, 2026

   

   Taliyaha

   on Oct 2, 2026

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   I don't know why it suddenly got better, please delete this feedback!
5. Selene0623 commented on Oct 4, 2026

   

   Selene0623

   on Oct 4, 2026

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   Additional evidence from a different provider/model — plus a related silent-failure variant.

   Environment: OpenCode V2, provider opencode-go, models mimo-v2.5 and mimo-v2.6-flash.

   Hard-fail path (this issue's error): 2026-10-04 22:05:53–22:05:58 UTC, three background subagent result calls all returned:

   [ERROR] OpenAI Chat tool call delta is missing id or name
   

   Tasks task_b2fe62bb, task_1eb2bb0f, task_57fa8495 died ~160s into their runs; repeated failures then tripped Circuit breaker OPEN for general. Try again later. (first hit 22:08:44 UTC, still firing at 23:29:36) — delegation was blocked for ~84 minutes. Nine delegated tasks errored in total that session.

   Silent-drop variant (no error raised): the same session's compress tool calls were recorded by the client with empty arguments:

   {"type":"tool","id":"call_4f80f0b9df644ad993bd69f7","name":"compress","executed":false,"state":{"status":"completed","input":{}, ...}}

   The assistant's reasoning in the same message shows the full content array being composed, and the rendered transcript shows compress({}) — the args were streamed but never landed in the recorded input, no missing id or name error was raised, the tool executed with {}, and the downstream proxy rejected it (no valid ranges parsed (kind=missing-content, dropped=0)). 8 such failures on 2026-09-25; identical argument format succeeded later in the same session, so this is not an argument-encoding problem.

   Cross-session scale (local session store scan, 6.0 GB): 7 sessions contain no valid ranges parsed markers — worst has 116, this session 25 (and 25 delta-error rows / 19 circuit-breaker rows).

   Suggestion: the malformed-delta handling appears to have two outcomes depending on where the delta breaks — a hard error (missing id/name) or silently accepting a tool call with zeroed arguments. The second one is the more dangerous: the tool runs on empty input and the failure surfaces much later in an unrelated component.

   Cross-reference: ranxianglei/billion-context#1366 (proxy-side view of the empty-args symptom).
6. github-actions commented on Oct 5, 2026

   

   github-actionsBot

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   This issue has been automatically closed because it was not updated to meet our contributing guidelines within the 72-hour window.

   Feel free to open a new issue that follows our issue templates.
7. github-actions

   removed

   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   on Oct 5, 2026
8. github-actions

   closed this as not plannedon Oct 5, 2026