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Fix: Disable Gemini reasoning during context condensing #9911

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Fix: Disable Gemini reasoning during context condensing #9911

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24 changes: 22 additions & 2 deletions src/core/task/Task.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1314,7 +1314,17 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
})
// Ensure profile and apiProvider exist before trying to build handler
if (profile && profile.apiProvider) {
condensingApiHandler = buildApiHandler(profile)
// For Gemini providers, disable reasoning features during condensing to prevent API errors
// Reasoning blocks can interfere with the condensing prompt structure
if (profile.apiProvider === "gemini" || profile.apiProvider === "vertex") {
condensingApiHandler = buildApiHandler({
...profile,
enableReasoningEffort: false,
modelMaxThinkingTokens: undefined,
})
} else {
condensingApiHandler = buildApiHandler(profile)
}
}
}
}
Expand Down Expand Up @@ -3460,7 +3470,17 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {

// Ensure profile and apiProvider exist before trying to build handler.
if (profile && profile.apiProvider) {
condensingApiHandler = buildApiHandler(profile)
// For Gemini providers, disable reasoning features during condensing to prevent API errors
// Reasoning blocks can interfere with the condensing prompt structure
if (profile.apiProvider === "gemini" || profile.apiProvider === "vertex") {
condensingApiHandler = buildApiHandler({
...profile,
enableReasoningEffort: false,
modelMaxThinkingTokens: undefined,
})
} else {
condensingApiHandler = buildApiHandler(profile)
}
}
}
}
Expand Down
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