feat: add isOpenAIR1FormatEnabled option for DeepSeek compatibility (RooCodeInc#2408)

Author: sbmaxx

.changeset/itchy-ravens-attend.md

@@ -0,0 +1,5 @@
+---
+"claude-dev": patch
+---
+
+feat: add isR1FormatRequired option for DeepSeek compatibility

src/api/providers/openai.ts

@@ -34,6 +34,7 @@ export class OpenAiHandler implements ApiHandler {
 	async *createMessage(systemPrompt: string, messages: Anthropic.Messages.MessageParam[]): ApiStream {
 		const modelId = this.options.openAiModelId ?? ""
 		const isDeepseekReasoner = modelId.includes("deepseek-reasoner")
+		const isR1FormatRequired = this.options.openAiModelInfo?.isR1FormatRequired ?? false
 		const isO3Mini = modelId.includes("o3-mini")
 
 		let openAiMessages: OpenAI.Chat.ChatCompletionMessageParam[] = [
@@ -43,7 +44,7 @@ export class OpenAiHandler implements ApiHandler {
 		let temperature: number | undefined = this.options.openAiModelInfo?.temperature ?? openAiModelInfoSaneDefaults.temperature
 		let reasoningEffort: ChatCompletionReasoningEffort | undefined = undefined
 
-		if (isDeepseekReasoner) {
+		if (isDeepseekReasoner || isR1FormatRequired) {
 			openAiMessages = convertToR1Format([{ role: "user", content: systemPrompt }, ...messages])
 		}
 

src/shared/api.ts

@@ -93,6 +93,7 @@ export interface ModelInfo {
 
 export interface OpenAiCompatibleModelInfo extends ModelInfo {
 	temperature?: number
+	isR1FormatRequired?: boolean
 }
 
 // Anthropic
@@ -437,6 +438,7 @@ export const openAiModelInfoSaneDefaults: OpenAiCompatibleModelInfo = {
 	contextWindow: 128_000,
 	supportsImages: true,
 	supportsPromptCache: false,
+	isR1FormatRequired: false,
 	inputPrice: 0,
 	outputPrice: 0,
 	temperature: 0,

webview-ui/src/components/settings/ApiOptions.tsx

@@ -846,6 +846,22 @@ const ApiOptions = ({ showModelOptions, apiErrorMessage, modelIdErrorMessage, is
 								}}>
 								Supports Computer Use
 							</VSCodeCheckbox>
+							<VSCodeCheckbox
+								checked={!!apiConfiguration?.openAiModelInfo?.isR1FormatRequired}
+								onChange={(e: any) => {
+									const isChecked = e.target.checked === true
+									let modelInfo = apiConfiguration?.openAiModelInfo
+										? apiConfiguration.openAiModelInfo
+										: { ...openAiModelInfoSaneDefaults }
+									modelInfo = { ...modelInfo, isR1FormatRequired: isChecked }
+
+									setApiConfiguration({
+										...apiConfiguration,
+										openAiModelInfo: modelInfo,
+									})
+								}}>
+								Enable R1 messages format
+							</VSCodeCheckbox>
 							<div style={{ display: "flex", gap: 10, marginTop: "5px" }}>
 								<VSCodeTextField
 									value={