feat: remove api flavor override from setting ui.

Author: Lagyu

packages/types/src/provider-settings.ts

@@ -179,7 +179,6 @@ const openAiSchema = baseProviderSettingsSchema.extend({
 	openAiStreamingEnabled: z.boolean().optional(),
 	openAiHostHeader: z.string().optional(), // Keep temporarily for backward compatibility during migration.
 	openAiHeaders: z.record(z.string(), z.string()).optional(),
-	openAiApiFlavor: z.union([z.literal("auto"), z.literal("responses"), z.literal("chat")]).optional(),
 })
 
 const ollamaSchema = baseProviderSettingsSchema.extend({

src/api/providers/__tests__/openai.spec.ts

@@ -1151,39 +1151,6 @@ describe("OpenAI Compatible - Responses API", () => {
 		expect(chatArgs).not.toHaveProperty("input")
 	})
 
-	it("Manual override: force Responses or Chat regardless of URL", async () => {
-		// Force Responses
-		const forceResp = new OpenAiHandler({
-			openAiApiKey: "k",
-			openAiModelId: "gpt-5",
-			openAiBaseUrl: "https://api.openai.com/v1", // no responses segment
-			openAiStreamingEnabled: false,
-			openAiApiFlavor: "responses",
-		})
-		for await (const _ of forceResp.createMessage("sys", baseMessages)) {
-		}
-		expect(mockResponsesCreate).toHaveBeenCalled()
-		const rArgs = mockResponsesCreate.mock.calls.pop()?.[0]
-		expect(rArgs).toHaveProperty("input")
-		expect(rArgs).not.toHaveProperty("messages")
-
-		// Force Chat
-		mockResponsesCreate.mockClear()
-		mockCreate.mockClear()
-		const forceChat = new OpenAiHandler({
-			openAiApiKey: "k",
-			openAiModelId: "gpt-4o",
-			openAiBaseUrl: "https://api.openai.com/v1/responses", // would auto-detect as responses
-			openAiStreamingEnabled: false,
-			openAiApiFlavor: "chat",
-		})
-		for await (const _ of forceChat.createMessage("sys", baseMessages)) {
-		}
-		expect(mockCreate).toHaveBeenCalled()
-		const cArgs = mockCreate.mock.calls.pop()?.[0]
-		expect(cArgs).toHaveProperty("messages")
-	})
-
 	it("Reasoning effort mapping: Responses uses reasoning: { effort }, Chat uses reasoning_effort", async () => {
 		// Responses path
 		const responsesHandler = new OpenAiHandler({

src/api/providers/openai.ts

@@ -70,8 +70,8 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
 			// Azure API shape slightly differs from the core API shape:
 			// https://github.com/openai/openai-node?tab=readme-ov-file#microsoft-azure-openai
 
-			// Determine if we're using the Responses API flavor for Azure
-			const flavor = this._resolveApiFlavor(this.options.openAiApiFlavor, this.options.openAiBaseUrl ?? "")
+			// Determine if we're using the Responses API flavor for Azure (auto-detect by URL only)
+			const flavor = this._resolveApiFlavor(this.options.openAiBaseUrl ?? "")
 			const isResponsesFlavor =
 				flavor === "responses" ||
 				this._isAzureOpenAiResponses(this.options.openAiBaseUrl) ||
@@ -127,8 +127,8 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
 		const deepseekReasoner = modelId.includes("deepseek-reasoner") || enabledR1Format
 		const ark = modelUrl.includes(".volces.com")
 
-		// Decide API flavor (manual override > auto-detect by URL)
-		const flavor = this._resolveApiFlavor(this.options.openAiApiFlavor, modelUrl)
+		// Decide API flavor (auto-detect by URL)
+		const flavor = this._resolveApiFlavor(modelUrl)
 
 		// If Responses API is selected, use the Responses payload and endpoint
 		if (flavor === "responses") {
@@ -373,7 +373,7 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
 	async completePrompt(prompt: string): Promise<string> {
 		try {
 			const isAzureAiInference = this._isAzureAiInference(this.options.openAiBaseUrl)
-			const flavor = this._resolveApiFlavor(this.options.openAiApiFlavor, this.options.openAiBaseUrl ?? "")
+			const flavor = this._resolveApiFlavor(this.options.openAiBaseUrl ?? "")
 			const model = this.getModel()
 			const modelInfo = model.info
 
@@ -644,12 +644,7 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
 
 	// --- Responses helpers ---
 
-	private _resolveApiFlavor(
-		override: "auto" | "responses" | "chat" | undefined,
-		baseUrl: string,
-	): "responses" | "chat" {
-		if (override === "responses") return "responses"
-		if (override === "chat") return "chat"
+	private _resolveApiFlavor(baseUrl: string): "responses" | "chat" {
 		// Auto-detect by URL path
 		const url = this._safeParseUrl(baseUrl)
 		const path = url?.pathname || ""