fix(provider): retry OpenAI Responses API on 404 errors

[zerone0x]

Summary

• Add isRetryable callback to openaiFailedResponseHandler to mark transient errors as retryable
• OpenAI's Responses API can return 404 for transient "Item not found" errors
• Enables automatic retry through the existing SessionProcessor retry mechanism

Retryable status codes: 404, 408, 429, 500, 502, 503, 504

Fixes #10505

Changes

• packages/opencode/src/provider/sdk/openai-compatible/src/responses/openai-error.ts - Added RETRYABLE_STATUS_CODES set and isRetryable callback

Test plan

• Verify OpenAI 404 errors are retried automatically
• Verify other retryable status codes (429, 500, etc.) trigger retry
• Verify non-retryable errors (400, 401, 403) do not retry

🤖 Generated with Claude Code

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

No duplicate PRs found

[tim-smart]

I tried this change and it does not fix the issue.

[zerone0x]

Thanks for testing! A few diagnostic questions:

1. Are you seeing the 404 on the initial request or mid-stream? This fix targets the openaiFailedResponseHandler which handles HTTP errors from the initial API call.

2. Could you share the full error message/output? The "Item not found" error might be coming through a different code path.

3. Is this happening with streaming enabled? If the 404 occurs during the SSE stream (as an error event rather than HTTP status), it might bypass this handler.

I traced the code flow and the isRetryable callback is being set correctly and should propagate through:

• openaiFailedResponseHandler → APICallError.isRetryable → MessageV2.APIError.data.isRetryable → SessionRetry.retryable()

If you can share more details about the specific scenario, I can investigate further or add logging to pinpoint where the issue is.

[tim-smart]

Fixed in #10590