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fix(agents): classify generic provider errors for failover (#59325)

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* fix(agents): classify generic provider errors for failover

Anthropic returns bare 'An unknown error occurred' during API instability
and OpenRouter wraps upstream failures as 'Provider returned error'. Neither
message was recognized by the failover classifier, so the error surfaced
directly to users instead of triggering the configured fallback chain.

Add both patterns to the serverError classifier so they are classified as
transient server errors (timeout) and trigger model failover.

Closes #49706
Closes #45834

* fix(agents): scope unknown-error failover by provider

* docs(changelog): note provider-scoped unknown-error failover

---------

Co-authored-by: Aaron Zhu <aaron@Aarons-MacBook-Air.local>
Co-authored-by: Altay <altay@uinaf.dev>
This commit is contained in:
Aaron Zhu
2026-04-04 23:11:46 +08:00
committed by GitHub
parent 8a6da9d488
commit 983909f826
8 changed files with 103 additions and 11 deletions
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4
src/agents/cli-runner.ts
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@@ -73,8 +73,8 @@ export async function runCliAgent(params: RunCliAgentParams): Promise<EmbeddedPi
throw err;
}
const message = err instanceof Error ? err.message : String(err);
if (isFailoverErrorMessage(message)) {
const reason = classifyFailoverReason(message) ?? "unknown";
if (isFailoverErrorMessage(message, { provider: params.provider })) {
const reason = classifyFailoverReason(message, { provider: params.provider }) ?? "unknown";
const status = resolveFailoverStatus(reason);
throw new FailoverError(message, {
reason,