boyan250422-code

[Feature Request] Support traditional Chat Completions API for OpenAI provider

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### Feature hasn't been suggested before. - [x] I have verified this feature I'm about to request hasn't been suggested before. ### Describe the enhancement you want to request ##...

[BUG] Custom provider initialization fails with "fn3 is not a function

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### Description ## Description Attempting to use a custom provider configuration results in a `TypeError: fn3 is not a function` during provider initialization. The custom provider feature appears to be...

[BUG] Schema.ref 'QuestionInfo' was set alongside unsupported fields in v1.1.x

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### Description **Body:** ## Description When using opencode v1.1.12 or v1.1.13, running any command with a custom provider configuration fails with a schema validation error related to `QuestionInfo`. ## Reproduction...