feat: add abort functionality for Cline Provider API requests

Implement request cancellation by:
- Add AbortController to ClineHandler to manage request lifecycle
- Thread abort signal through createOpenRouterStream to API calls
- Expose abort() method to allow cancellation of in-flight requests
- Add logging for abort operations

This enables users to cancel long-running API requests, improving control over resource usage and user experience.

src/core/api/providers/cline.ts

@@ -38,6 +38,7 @@ export class ClineHandler implements ApiHandler {
 	private readonly _baseUrl = ClineEnv.config().apiBaseUrl
 	lastGenerationId?: string
 	private lastRequestId?: string
+	private abortController?: AbortController
 
 	constructor(options: ClineHandlerOptions) {
 		this.options = options
@@ -101,7 +102,7 @@ export class ClineHandler implements ApiHandler {
 	async *createMessage(systemPrompt: string, messages: ClineStorageMessage[], tools?: OpenAITool[]): ApiStream {
 		try {
 			const client = await this.ensureClient()
-
+			this.abortController = new AbortController()
 			this.lastGenerationId = undefined
 			this.lastRequestId = undefined
 
@@ -117,6 +118,7 @@ export class ClineHandler implements ApiHandler {
 				this.options.openRouterProviderSorting,
 				tools,
 				this.options.geminiThinkingLevel,
+				this.abortController.signal,
 			)
 
 			const toolCallProcessor = new ToolCallProcessor()
@@ -271,6 +273,12 @@ export class ClineHandler implements ApiHandler {
 		return this.lastRequestId
 	}
 
+	abort(): void {
+		this.abortController?.abort()
+		this.abortController = undefined
+		Logger.log("ClineHandler: Aborted ongoing request")
+	}
+
 	getModel(): { id: string; info: ModelInfo } {
 		const modelId = this.options.openRouterModelId
 		const modelInfo = this.options.openRouterModelInfo

src/core/api/transform/openrouter-stream.ts

@@ -23,6 +23,7 @@ export async function createOpenRouterStream(
 	openRouterProviderSorting?: string,
 	tools?: Array<ChatCompletionTool>,
 	geminiThinkingLevel?: string,
+	abortSignal?: AbortSignal,
 ) {
 	// Convert Anthropic messages to OpenAI format
 	let openAiMessages: OpenAI.Chat.ChatCompletionMessageParam[] = [
@@ -209,6 +210,7 @@ export async function createOpenRouterStream(
 		...(model.id.includes("gemini") && geminiThinkingLevel
 			? { thinking_config: { thinking_level: geminiThinkingLevel, include_thoughts: true } }
 			: {}),
+		signal: abortSignal,
 	})
 
 	return stream