What happened?
When Anthropic's API returns a transient server error (HTTP 500, 502, 503, or 504), OpenCode immediately fails with no retry:
{"type":"api_error","message":"Claude API returned a server error. This is usually temporary — try again in a moment."}
The same infrastructure already retries 429 and 529 — but 500/502/503/504 are silently dropped.
Root cause
parseAPICallError() in packages/opencode/src/provider/error.ts trusts input.error.isRetryable from the Vercel AI SDK for non-OpenAI providers. The @ai-sdk/anthropic package only sets isRetryable: true for 429 and 529. HTTP 500/502/503/504 get isRetryable: false, so SessionRetry.retryable() returns undefined and the retry loop exits.
OpenAI already has a isOpenAiErrorRetryable() override — the same pattern needs to apply universally.
Steps to reproduce
- Configure Anthropic as provider
- Trigger or wait for a 500/502/503/504 response (during outages or high load)
- Observe: immediate error with no retry attempt
Expected behavior
OpenCode should retry 500/502/503/504 with exponential backoff, the same as 429/529.
What happened?
When Anthropic's API returns a transient server error (HTTP 500, 502, 503, or 504), OpenCode immediately fails with no retry:
The same infrastructure already retries 429 and 529 — but 500/502/503/504 are silently dropped.
Root cause
parseAPICallError()inpackages/opencode/src/provider/error.tstrustsinput.error.isRetryablefrom the Vercel AI SDK for non-OpenAI providers. The@ai-sdk/anthropicpackage only setsisRetryable: truefor 429 and 529. HTTP 500/502/503/504 getisRetryable: false, soSessionRetry.retryable()returnsundefinedand the retry loop exits.OpenAI already has a
isOpenAiErrorRetryable()override — the same pattern needs to apply universally.Steps to reproduce
Expected behavior
OpenCode should retry 500/502/503/504 with exponential backoff, the same as 429/529.