Consider "refusal" in AiResponse.FinishReason

[alex-dixon]

I see in the latest generated Anthropic PR (#4897) we parse "refusal" from the Anthropic API stop reason.

Currently this would be parsed into AiResponse.FinishReason as "unknown". Just wanted to mention in case it slips through the cracks.

effect/packages/ai/ai/src/AiResponse.ts

Line 562 in cb3c30f

export const FinishReason: Schema.Literal<[

As a side note, if refusals are ultimately surfaced as successful responses, the retry/model fallback behavior via AiPlan's while function seems unable provide input for what to do next when there is a refusal.

[IMax153]

I'll tackle this after we merge #4918.

[Necmttn]

is there a way to monkey patch this ?
i'm trying to use aws bedrock models with effect proxied models doesnt contain refusal