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fix: preserve empty reasoning_content for DeepSeek V4 thinking mode #24146

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Merged
rekram1-node merged 2 commits into from
Apr 24, 2026
+10 −15
Merged

fix: preserve empty reasoning_content for DeepSeek V4 thinking mode #24146

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931e6ed
fix: preserve empty reasoning_content in interleaved transform
heimoshuiyu Apr 24, 2026
7f708c6
Merge branch 'dev' into fix/empty-reasoning-content
simonklee Apr 24, 2026
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25 changes: 10 additions & 15 deletions packages/opencode/src/provider/transform.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -185,24 +185,19 @@ function normalizeMessages(
// Filter out reasoning parts from content
const filteredContent = msg.content.filter((part: any) => part.type !== "reasoning")

// Include reasoning_content | reasoning_details directly on the message for all assistant messages
if (reasoningText) {
return {
...msg,
content: filteredContent,
providerOptions: {
...msg.providerOptions,
openaiCompatible: {
...msg.providerOptions?.openaiCompatible,
[field]: reasoningText,
},
},
}
}

// Include reasoning_content | reasoning_details directly on the message for all assistant messages.
// Always set the field even when empty — some providers (e.g. DeepSeek) may return empty
// reasoning_content which still needs to be sent back in subsequent requests.
return {
...msg,
content: filteredContent,
providerOptions: {
...msg.providerOptions,
openaiCompatible: {
...msg.providerOptions?.openaiCompatible,
[field]: reasoningText,
},
},
}
}

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