feat: remove OpenRouter Transforms feature (#10341)

- Remove openRouterUseMiddleOutTransform checkbox from settings UI
- Remove openRouterUseMiddleOutTransform from TypeScript types
- Remove transforms parameter logic from OpenRouter handler
- Remove setting from EVALS_SETTINGS
- Remove translation keys from all locale files (18 locales)

Co-authored-by: Roo Code <roomote@roocode.com>

packages/types/src/global-settings.ts

@@ -291,7 +291,6 @@ export const isGlobalStateKey = (key: string): key is Keys<GlobalState> =>
 // Default settings when running evals (unless overridden).
 export const EVALS_SETTINGS: RooCodeSettings = {
 	apiProvider: "openrouter",
-	openRouterUseMiddleOutTransform: false,
 
 	lastShownAnnouncementId: "jul-09-2025-3-23-0",
 

packages/types/src/provider-settings.ts

@@ -207,7 +207,6 @@ const openRouterSchema = baseProviderSettingsSchema.extend({
 	openRouterModelId: z.string().optional(),
 	openRouterBaseUrl: z.string().optional(),
 	openRouterSpecificProvider: z.string().optional(),
-	openRouterUseMiddleOutTransform: z.boolean().optional(),
 })
 
 const bedrockSchema = apiModelIdProviderModelSchema.extend({

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

@@ -268,38 +268,11 @@ describe("OpenRouterHandler", () => {
 					stream_options: { include_usage: true },
 					temperature: 0,
 					top_p: undefined,
-					transforms: ["middle-out"],
 				}),
 				{ headers: { "x-anthropic-beta": "fine-grained-tool-streaming-2025-05-14" } },
 			)
 		})
 
-		it("supports the middle-out transform", async () => {
-			const handler = new OpenRouterHandler({
-				...mockOptions,
-				openRouterUseMiddleOutTransform: true,
-			})
-			const mockStream = {
-				async *[Symbol.asyncIterator]() {
-					yield {
-						id: "test-id",
-						choices: [{ delta: { content: "test response" } }],
-					}
-				},
-			}
-
-			const mockCreate = vitest.fn().mockResolvedValue(mockStream)
-			;(OpenAI as any).prototype.chat = {
-				completions: { create: mockCreate },
-			} as any
-
-			await handler.createMessage("test", []).next()
-
-			expect(mockCreate).toHaveBeenCalledWith(expect.objectContaining({ transforms: ["middle-out"] }), {
-				headers: { "x-anthropic-beta": "fine-grained-tool-streaming-2025-05-14" },
-			})
-		})
-
 		it("adds cache control for supported models", async () => {
 			const handler = new OpenRouterHandler({
 				...mockOptions,

src/api/providers/openrouter.ts

@@ -293,8 +293,6 @@ export class OpenRouterHandler extends BaseProvider implements SingleCompletionH
 			}
 		}
 
-		const transforms = (this.options.openRouterUseMiddleOutTransform ?? true) ? ["middle-out"] : undefined
-
 		// https://openrouter.ai/docs/transforms
 		const completionParams: OpenRouterChatCompletionParams = {
 			model: modelId,
@@ -313,7 +311,6 @@ export class OpenRouterHandler extends BaseProvider implements SingleCompletionH
 						allow_fallbacks: false,
 					},
 				}),
-			...(transforms && { transforms }),
 			...(reasoning && { reasoning }),
 			...(metadata?.tools && { tools: this.convertToolsForOpenAI(metadata.tools) }),
 			...(metadata?.tool_choice && { tool_choice: metadata.tool_choice }),

src/core/webview/ClineProvider.ts

@@ -1896,7 +1896,6 @@ export class ClineProvider
 			imageGenerationProvider,
 			openRouterImageApiKey,
 			openRouterImageGenerationSelectedModel,
-			openRouterUseMiddleOutTransform,
 			featureRoomoteControlEnabled,
 			isBrowserSessionActive,
 		} = await this.getState()
@@ -2067,7 +2066,6 @@ export class ClineProvider
 			imageGenerationProvider,
 			openRouterImageApiKey,
 			openRouterImageGenerationSelectedModel,
-			openRouterUseMiddleOutTransform,
 			featureRoomoteControlEnabled,
 			claudeCodeIsAuthenticated: await (async () => {
 				try {
@@ -2259,7 +2257,6 @@ export class ClineProvider
 			customModes,
 			maxOpenTabsContext: stateValues.maxOpenTabsContext ?? 20,
 			maxWorkspaceFiles: stateValues.maxWorkspaceFiles ?? 200,
-			openRouterUseMiddleOutTransform: stateValues.openRouterUseMiddleOutTransform,
 			browserToolEnabled: stateValues.browserToolEnabled ?? true,
 			telemetrySetting: stateValues.telemetrySetting || "unset",
 			showRooIgnoredFiles: stateValues.showRooIgnoredFiles ?? false,

src/shared/ExtensionMessage.ts

@@ -352,7 +352,6 @@ export type ExtensionState = Pick<
 	profileThresholds: Record<string, number>
 	hasOpenedModeSelector: boolean
 	openRouterImageApiKey?: string
-	openRouterUseMiddleOutTransform?: boolean
 	messageQueue?: QueuedMessage[]
 	lastShownAnnouncementId?: string
 	apiModelId?: string

webview-ui/src/components/settings/providers/OpenRouter.tsx

@@ -1,5 +1,4 @@
 import { useCallback, useState } from "react"
-import { Trans } from "react-i18next"
 import { Checkbox } from "vscrui"
 import { VSCodeTextField } from "@vscode/webview-ui-toolkit/react"
 
@@ -11,7 +10,7 @@ import { useAppTranslation } from "@src/i18n/TranslationContext"
 import { getOpenRouterAuthUrl } from "@src/oauth/urls"
 import { VSCodeButtonLink } from "@src/components/common/VSCodeButtonLink"
 
-import { inputEventTransform, noTransform } from "../transforms"
+import { inputEventTransform } from "../transforms"
 
 import { ModelPicker } from "../ModelPicker"
 import { OpenRouterBalanceDisplay } from "./OpenRouterBalanceDisplay"
@@ -78,40 +77,28 @@ export const OpenRouter = ({
 				</VSCodeButtonLink>
 			)}
 			{!simplifySettings && (
-				<>
-					<div>
-						<Checkbox
-							checked={openRouterBaseUrlSelected}
-							onChange={(checked: boolean) => {
-								setOpenRouterBaseUrlSelected(checked)
-
-								if (!checked) {
-									setApiConfigurationField("openRouterBaseUrl", "")
-								}
-							}}>
-							{t("settings:providers.useCustomBaseUrl")}
-						</Checkbox>
-						{openRouterBaseUrlSelected && (
-							<VSCodeTextField
-								value={apiConfiguration?.openRouterBaseUrl || ""}
-								type="url"
-								onInput={handleInputChange("openRouterBaseUrl")}
-								placeholder="Default: https://openrouter.ai/api/v1"
-								className="w-full mt-1"
-							/>
-						)}
-					</div>
+				<div>
 					<Checkbox
-						checked={apiConfiguration?.openRouterUseMiddleOutTransform ?? true}
-						onChange={handleInputChange("openRouterUseMiddleOutTransform", noTransform)}>
-						<Trans
-							i18nKey="settings:providers.openRouterTransformsText"
-							components={{
-								a: <a href="https://openrouter.ai/docs/transforms" />,
-							}}
-						/>
+						checked={openRouterBaseUrlSelected}
+						onChange={(checked: boolean) => {
+							setOpenRouterBaseUrlSelected(checked)
+
+							if (!checked) {
+								setApiConfigurationField("openRouterBaseUrl", "")
+							}
+						}}>
+						{t("settings:providers.useCustomBaseUrl")}
 					</Checkbox>
-				</>
+					{openRouterBaseUrlSelected && (
+						<VSCodeTextField
+							value={apiConfiguration?.openRouterBaseUrl || ""}
+							type="url"
+							onInput={handleInputChange("openRouterBaseUrl")}
+							placeholder="Default: https://openrouter.ai/api/v1"
+							className="w-full mt-1"
+						/>
+					)}
+				</div>
 			)}
 			<ModelPicker
 				apiConfiguration={apiConfiguration}

webview-ui/src/i18n/locales/ca/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Obtenir clau API de Requesty",
 		"getRequestyBaseUrl": "URL base",
 		"requestyUseCustomBaseUrl": "Utilitza l'URL base personalitzada",
-		"openRouterTransformsText": "Comprimir prompts i cadenes de missatges a la mida del context (<a>Transformacions d'OpenRouter</a>)",
 		"anthropicApiKey": "Clau API d'Anthropic",
 		"getAnthropicApiKey": "Obtenir clau API d'Anthropic",
 		"anthropicUseAuthToken": "Passar la clau API d'Anthropic com a capçalera d'autorització en lloc de X-Api-Key",

webview-ui/src/i18n/locales/de/settings.json

@@ -296,7 +296,6 @@
 		"getRequestyApiKey": "Requesty API-Schlüssel erhalten",
 		"getRequestyBaseUrl": "Basis-URL",
 		"requestyUseCustomBaseUrl": "Benutzerdefinierte Basis-URL verwenden",
-		"openRouterTransformsText": "Prompts und Nachrichtenketten auf Kontextgröße komprimieren (<a>OpenRouter Transformationen</a>)",
 		"anthropicApiKey": "Anthropic API-Schlüssel",
 		"getAnthropicApiKey": "Anthropic API-Schlüssel erhalten",
 		"anthropicUseAuthToken": "Anthropic API-Schlüssel als Authorization-Header anstelle von X-Api-Key übergeben",

webview-ui/src/i18n/locales/en/settings.json

@@ -303,7 +303,6 @@
 		"getRequestyApiKey": "Create new Requesty API Key",
 		"getRequestyBaseUrl": "Base URL",
 		"requestyUseCustomBaseUrl": "Use custom base URL",
-		"openRouterTransformsText": "Compress prompts and message chains to the context size (<a>OpenRouter Transforms</a>)",
 		"anthropicApiKey": "Anthropic API Key",
 		"getAnthropicApiKey": "Get Anthropic API Key",
 		"anthropicUseAuthToken": "Pass Anthropic API Key as Authorization header instead of X-Api-Key",

webview-ui/src/i18n/locales/es/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Obtener clave API de Requesty",
 		"getRequestyBaseUrl": "URL base",
 		"requestyUseCustomBaseUrl": "Utilice una URL base personalizada",
-		"openRouterTransformsText": "Comprimir prompts y cadenas de mensajes al tamaño del contexto (<a>Transformaciones de OpenRouter</a>)",
 		"anthropicApiKey": "Clave API de Anthropic",
 		"getAnthropicApiKey": "Obtener clave API de Anthropic",
 		"anthropicUseAuthToken": "Pasar la clave API de Anthropic como encabezado de autorización en lugar de X-Api-Key",

webview-ui/src/i18n/locales/fr/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Obtenir la clé API Requesty",
 		"getRequestyBaseUrl": "URL de base",
 		"requestyUseCustomBaseUrl": "Utiliser une URL de base personnalisée",
-		"openRouterTransformsText": "Compresser les prompts et chaînes de messages à la taille du contexte (<a>Transformations OpenRouter</a>)",
 		"anthropicApiKey": "Clé API Anthropic",
 		"getAnthropicApiKey": "Obtenir la clé API Anthropic",
 		"anthropicUseAuthToken": "Passer la clé API Anthropic comme en-tête d'autorisation au lieu de X-Api-Key",

webview-ui/src/i18n/locales/hi/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Requesty API कुंजी प्राप्त करें",
 		"getRequestyBaseUrl": "बेस URL",
 		"requestyUseCustomBaseUrl": "कस्टम बेस URL का उपयोग करें",
-		"openRouterTransformsText": "संदर्भ आकार के लिए प्रॉम्प्ट और संदेश श्रृंखलाओं को संपीड़ित करें (<a>OpenRouter ट्रांसफॉर्म</a>)",
 		"anthropicApiKey": "Anthropic API कुंजी",
 		"getAnthropicApiKey": "Anthropic API कुंजी प्राप्त करें",
 		"anthropicUseAuthToken": "X-Api-Key के बजाय Anthropic API कुंजी को Authorization हेडर के रूप में पास करें",

webview-ui/src/i18n/locales/id/settings.json

@@ -298,7 +298,6 @@
 		"getRequestyApiKey": "Dapatkan Requesty API Key",
 		"getRequestyBaseUrl": "Base URL",
 		"requestyUseCustomBaseUrl": "Gunakan URL dasar khusus",
-		"openRouterTransformsText": "Kompres prompt dan rantai pesan ke ukuran konteks (<a>OpenRouter Transforms</a>)",
 		"anthropicApiKey": "Anthropic API Key",
 		"getAnthropicApiKey": "Dapatkan Anthropic API Key",
 		"anthropicUseAuthToken": "Kirim Anthropic API Key sebagai Authorization header alih-alih X-Api-Key",

webview-ui/src/i18n/locales/it/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Ottieni chiave API Requesty",
 		"getRequestyBaseUrl": "URL base",
 		"requestyUseCustomBaseUrl": "Utilizza URL di base personalizzato",
-		"openRouterTransformsText": "Comprimi prompt e catene di messaggi alla dimensione del contesto (<a>Trasformazioni OpenRouter</a>)",
 		"anthropicApiKey": "Chiave API Anthropic",
 		"getAnthropicApiKey": "Ottieni chiave API Anthropic",
 		"anthropicUseAuthToken": "Passa la chiave API Anthropic come header di autorizzazione invece di X-Api-Key",

webview-ui/src/i18n/locales/ja/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Requesty APIキーを取得",
 		"getRequestyBaseUrl": "ベースURL",
 		"requestyUseCustomBaseUrl": "カスタムベースURLを使用する",
-		"openRouterTransformsText": "プロンプトとメッセージチェーンをコンテキストサイズに圧縮 (<a>OpenRouter Transforms</a>)",
 		"anthropicApiKey": "Anthropic APIキー",
 		"getAnthropicApiKey": "Anthropic APIキーを取得",
 		"anthropicUseAuthToken": "Anthropic APIキーをX-Api-Keyの代わりにAuthorizationヘッダーとして渡す",

webview-ui/src/i18n/locales/ko/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Requesty API 키 받기",
 		"getRequestyBaseUrl": "기본 URL",
 		"requestyUseCustomBaseUrl": "사용자 정의 기본 URL 사용",
-		"openRouterTransformsText": "프롬프트와 메시지 체인을 컨텍스트 크기로 압축 (<a>OpenRouter Transforms</a>)",
 		"anthropicApiKey": "Anthropic API 키",
 		"getAnthropicApiKey": "Anthropic API 키 받기",
 		"anthropicUseAuthToken": "X-Api-Key 대신 Authorization 헤더로 Anthropic API 키 전달",

webview-ui/src/i18n/locales/nl/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Requesty API-sleutel ophalen",
 		"getRequestyBaseUrl": "Basis-URL",
 		"requestyUseCustomBaseUrl": "Gebruik aangepaste basis-URL",
-		"openRouterTransformsText": "Comprimeer prompts en berichtreeksen tot de contextgrootte (<a>OpenRouter Transforms</a>)",
 		"anthropicApiKey": "Anthropic API-sleutel",
 		"getAnthropicApiKey": "Anthropic API-sleutel ophalen",
 		"anthropicUseAuthToken": "Anthropic API-sleutel als Authorization-header doorgeven in plaats van X-Api-Key",

webview-ui/src/i18n/locales/pl/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Uzyskaj klucz API Requesty",
 		"getRequestyBaseUrl": "Bazowy URL",
 		"requestyUseCustomBaseUrl": "Użyj niestandardowego bazowego URL",
-		"openRouterTransformsText": "Kompresuj podpowiedzi i łańcuchy wiadomości do rozmiaru kontekstu (<a>Transformacje OpenRouter</a>)",
 		"anthropicApiKey": "Klucz API Anthropic",
 		"getAnthropicApiKey": "Uzyskaj klucz API Anthropic",
 		"anthropicUseAuthToken": "Przekaż klucz API Anthropic jako nagłówek Authorization zamiast X-Api-Key",

webview-ui/src/i18n/locales/pt-BR/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Obter chave de API Requesty",
 		"getRequestyBaseUrl": "URL Base",
 		"requestyUseCustomBaseUrl": "Usar URL base personalizada",
-		"openRouterTransformsText": "Comprimir prompts e cadeias de mensagens para o tamanho do contexto (<a>Transformações OpenRouter</a>)",
 		"anthropicApiKey": "Chave de API Anthropic",
 		"getAnthropicApiKey": "Obter chave de API Anthropic",
 		"anthropicUseAuthToken": "Passar a chave de API Anthropic como cabeçalho Authorization em vez de X-Api-Key",

webview-ui/src/i18n/locales/ru/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Получить Requesty API-ключ",
 		"getRequestyBaseUrl": "Базовый URL",
 		"requestyUseCustomBaseUrl": "Использовать пользовательский базовый URL",
-		"openRouterTransformsText": "Сжимать подсказки и цепочки сообщений до размера контекста (<a>OpenRouter Transforms</a>)",
 		"anthropicApiKey": "Anthropic API-ключ",
 		"getAnthropicApiKey": "Получить Anthropic API-ключ",
 		"anthropicUseAuthToken": "Передавать Anthropic API-ключ как Authorization-заголовок вместо X-Api-Key",

webview-ui/src/i18n/locales/tr/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Requesty API Anahtarı Al",
 		"getRequestyBaseUrl": "Temel URL",
 		"requestyUseCustomBaseUrl": "Özel temel URL kullan",
-		"openRouterTransformsText": "İstem ve mesaj zincirlerini bağlam boyutuna sıkıştır (<a>OpenRouter Dönüşümleri</a>)",
 		"anthropicApiKey": "Anthropic API Anahtarı",
 		"getAnthropicApiKey": "Anthropic API Anahtarı Al",
 		"anthropicUseAuthToken": "Anthropic API Anahtarını X-Api-Key yerine Authorization başlığı olarak geçir",

webview-ui/src/i18n/locales/vi/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "Lấy khóa API Requesty",
 		"getRequestyBaseUrl": "URL cơ sở",
 		"requestyUseCustomBaseUrl": "Sử dụng URL cơ sở tùy chỉnh",
-		"openRouterTransformsText": "Nén lời nhắc và chuỗi tin nhắn theo kích thước ngữ cảnh (<a>OpenRouter Transforms</a>)",
 		"anthropicApiKey": "Khóa API Anthropic",
 		"getAnthropicApiKey": "Lấy khóa API Anthropic",
 		"anthropicUseAuthToken": "Truyền khóa API Anthropic dưới dạng tiêu đề Authorization thay vì X-Api-Key",

webview-ui/src/i18n/locales/zh-CN/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "获取 Requesty API 密钥",
 		"getRequestyBaseUrl": "基础 URL",
 		"requestyUseCustomBaseUrl": "使用自定义基础 URL",
-		"openRouterTransformsText": "自动压缩提示词和消息链到上下文长度限制内 (<a>OpenRouter转换</a>)",
 		"anthropicApiKey": "Anthropic API 密钥",
 		"getAnthropicApiKey": "获取 Anthropic API 密钥",
 		"anthropicUseAuthToken": "将 Anthropic API 密钥作为 Authorization 标头传递，而不是 X-Api-Key",

webview-ui/src/i18n/locales/zh-TW/settings.json

@@ -294,7 +294,6 @@
 		"getRequestyApiKey": "取得 Requesty API 金鑰",
 		"getRequestyBaseUrl": "基礎 URL",
 		"requestyUseCustomBaseUrl": "使用自訂基礎 URL",
-		"openRouterTransformsText": "將提示和訊息鏈壓縮到上下文大小 (<a>OpenRouter 轉換</a>)",
 		"anthropicApiKey": "Anthropic API 金鑰",
 		"getAnthropicApiKey": "取得 Anthropic API 金鑰",
 		"anthropicUseAuthToken": "將 Anthropic API 金鑰作為 Authorization 標頭傳遞，而非使用 X-Api-Key",