OpenAI-Compatible Adapter Resoning /Thinking Mode not working

[devshahoriar]

TanStack AI version

"@tanstack/ai": "^0.42.0",

Framework/Library version

"react": "19.2.3","expo": "~57.0.7",

Describe the bug and the steps to reproduce it

// Enable reasoning/thinking extraction for DeepSeek reasoning_content
;(OpenAICompatibleChatAdapter.prototype as any).extractReasoning = function (
chunk: any,
) {
const delta = chunk?.choices?.[0]?.delta
const text = delta?.reasoning_content || delta?.reasoning
if (text) {
return { text }
}
return undefined
}

export const deepseek = openaiCompatible({
name: 'deepseek',
baseURL: 'https://api.deepseek.com/v1',
apiKey: env.DEEPSEEK_API_KEY,
models: ['deepseek-chat', 'deepseek-reasoner'],
}) as any

copilot suggest me to do this for resoning

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

given

Screenshots or Videos (Optional)

No response

Do you intend to try to help solve this bug with your own PR?

None

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• I agree to follow this project's Code of Conduct
• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.