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feat(api): wire AbortSignal to SDK providers (vscode-lm, gemini, mistral)
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‎src/api/providers/__tests__/gemini-abort-signal.spec.ts‎

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// npx vitest run src/api/providers/__tests__/gemini-abort-signal.spec.ts
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const mockCaptureException = vitest.fn()
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vitest.mock("@roo-code/telemetry", () => ({
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TelemetryService: {
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instance: {
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captureException: (...args: unknown[]) => mockCaptureException(...args),
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},
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},
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}))
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import { Anthropic } from "@anthropic-ai/sdk"
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import { GeminiHandler } from "../gemini"
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const GEMINI_MODEL_NAME = "gemini-2.0-flash-exp"
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describe("GeminiHandler abort signal", () => {
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let handler: GeminiHandler
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beforeEach(() => {
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mockCaptureException.mockClear()
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const mockGenerateContentStream = vitest.fn()
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const mockGenerateContent = vitest.fn()
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handler = new GeminiHandler({
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apiKey: "test-key",
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apiModelId: GEMINI_MODEL_NAME,
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geminiApiKey: "test-key",
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})
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handler["client"] = {
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models: {
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generateContentStream: mockGenerateContentStream,
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generateContent: mockGenerateContent,
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},
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} as any
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})
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describe("createMessage", () => {
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const mockMessages: Anthropic.Messages.MessageParam[] = [
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{ role: "user", content: "Hello" },
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{ role: "assistant", content: "Hi there!" },
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]
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const systemPrompt = "You are a helpful assistant"
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it("should forward abortSignal inside config for streaming", async () => {
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const controller = new AbortController()
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;(handler["client"].models.generateContentStream as any).mockResolvedValue({
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[Symbol.asyncIterator]: async function* () {
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yield { text: "response" }
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yield { usageMetadata: { promptTokenCount: 5, candidatesTokenCount: 3 } }
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},
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})
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const stream = handler.createMessage(systemPrompt, mockMessages, {
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taskId: "test",
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abortSignal: controller.signal,
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})
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const chunks = []
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for await (const chunk of stream) {
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chunks.push(chunk)
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}
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expect(handler["client"].models.generateContentStream).toHaveBeenCalledWith(
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expect.objectContaining({
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model: GEMINI_MODEL_NAME,
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config: expect.objectContaining({
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abortSignal: controller.signal,
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}),
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}),
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)
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})
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it("should work without abortSignal", async () => {
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;(handler["client"].models.generateContentStream as any).mockResolvedValue({
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[Symbol.asyncIterator]: async function* () {
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yield { text: "response" }
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yield { usageMetadata: { promptTokenCount: 5, candidatesTokenCount: 3 } }
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},
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})
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const stream = handler.createMessage(systemPrompt, mockMessages, { taskId: "test" })
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const chunks = []
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for await (const chunk of stream) {
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chunks.push(chunk)
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}
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expect(chunks.length).toBeGreaterThan(0)
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// Without abortSignal, config should not have abortSignal property
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const callArgs = (handler["client"].models.generateContentStream as any).mock.calls[0][0]
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expect(callArgs.config.abortSignal).toBeUndefined()
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})
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})
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describe("completePrompt", () => {
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it("should pass abort signal through to client via httpOptions", async () => {
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const controller = new AbortController()
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;(handler["client"].models.generateContent as any).mockResolvedValue({ text: "response" })
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await handler.completePrompt("test prompt", { abortSignal: controller.signal })
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expect(handler["client"].models.generateContent).toHaveBeenCalledWith({
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model: GEMINI_MODEL_NAME,
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contents: [{ role: "user", parts: [{ text: "test prompt" }] }],
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config: {
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httpOptions: { signal: controller.signal },
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temperature: 1,
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},
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})
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})
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it("should work without options (backward compatible)", async () => {
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;(handler["client"].models.generateContent as any).mockResolvedValue({ text: "response" })
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const result = await handler.completePrompt("test prompt")
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expect(result).toBe("response")
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})
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})
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})

‎src/api/providers/__tests__/mistral-abort-signal.spec.ts‎

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// npx vitest run src/api/providers/__tests__/mistral-abort-signal.spec.ts
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const mockCaptureException = vi.hoisted(() => vi.fn())
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vi.mock("@roo-code/telemetry", () => ({
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TelemetryService: {
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instance: {
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captureException: mockCaptureException,
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},
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},
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}))
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// Mock Mistral client
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const mockCreate = vi.fn()
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const mockComplete = vi.fn()
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vi.mock("@mistralai/mistralai", () => ({
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Mistral: vi.fn().mockImplementation(function () {
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return {
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chat: {
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stream: mockCreate.mockImplementation(async (_options) => {
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const stream = {
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[Symbol.asyncIterator]: async function* () {
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yield {
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data: {
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choices: [{ delta: { content: "Test response" }, index: 0 }],
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},
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}
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},
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}
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return stream
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}),
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complete: mockComplete.mockImplementation(async (_options) => ({
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choices: [{ message: { content: "Test response" } }],
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})),
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},
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}
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}),
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}))
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import type { Anthropic } from "@anthropic-ai/sdk"
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import type OpenAI from "openai"
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import { MistralHandler } from "../mistral"
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import type { ApiHandlerOptions } from "../../../shared/api"
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import type { ApiHandlerCreateMessageMetadata } from "../../index"
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describe("MistralHandler abort signal", () => {
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let handler: MistralHandler
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let mockOptions: ApiHandlerOptions
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beforeEach(() => {
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mockOptions = {
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apiModelId: "codestral-latest",
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mistralApiKey: "test-api-key",
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includeMaxTokens: true,
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modelTemperature: 0,
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}
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handler = new MistralHandler(mockOptions)
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mockCreate.mockClear()
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mockComplete.mockClear()
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mockCaptureException.mockClear()
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})
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describe("createMessage streaming", () => {
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const systemPrompt = "You are a helpful assistant."
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const messages: Anthropic.Messages.MessageParam[] = [
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{ role: "user", content: [{ type: "text", text: "Hello!" }] },
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]
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it("should forward abortSignal to fetchOptions for streaming", async () => {
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const controller = new AbortController()
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const metadata: ApiHandlerCreateMessageMetadata = { taskId: "test-task", abortSignal: controller.signal }
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await handler.createMessage(systemPrompt, messages, metadata).next()
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expect(mockCreate).toHaveBeenCalledWith(
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expect.objectContaining({
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model: mockOptions.apiModelId,
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fetchOptions: { signal: controller.signal },
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}),
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)
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})
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it("should work without abortSignal", async () => {
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const metadata: ApiHandlerCreateMessageMetadata = { taskId: "test-task" }
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await handler.createMessage(systemPrompt, messages, metadata).next()
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expect(mockCreate).toHaveBeenCalledWith(
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expect.objectContaining({
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model: mockOptions.apiModelId,
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}),
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)
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// fetchOptions should be undefined when no abortSignal
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const callArgs = mockCreate.mock.calls[0][0]
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expect(callArgs.fetchOptions).toBeUndefined()
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})
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it("should forward abortSignal with tools", async () => {
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const controller = new AbortController()
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const mockTools: OpenAI.Chat.ChatCompletionTool[] = [
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{
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type: "function",
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function: {
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name: "test_tool",
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description: "A test tool",
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parameters: { type: "object", properties: {} },
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},
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},
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]
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const metadata: ApiHandlerCreateMessageMetadata = {
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taskId: "test-task",
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tools: mockTools,
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abortSignal: controller.signal,
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}
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await handler.createMessage(systemPrompt, messages, metadata).next()
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expect(mockCreate).toHaveBeenCalledWith(
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expect.objectContaining({
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model: mockOptions.apiModelId,
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tools: expect.any(Array),
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fetchOptions: { signal: controller.signal },
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}),
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)
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})
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})
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describe("completePrompt non-streaming", () => {
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it("should pass abort signal through to client", async () => {
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const controller = new AbortController()
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mockComplete.mockResolvedValueOnce({
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choices: [{ message: { content: "response" } }],
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})
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await handler.completePrompt("test prompt", { abortSignal: controller.signal })
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expect(mockComplete).toHaveBeenCalledWith(expect.objectContaining({ model: expect.any(String) }), {
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fetchOptions: { signal: controller.signal },
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})
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})
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it("should work without options (backward compatible)", async () => {
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mockComplete.mockResolvedValueOnce({
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choices: [{ message: { content: "response" } }],
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})
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const result = await handler.completePrompt("test prompt")
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expect(result).toBe("response")
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expect(mockComplete).toHaveBeenCalledWith(expect.objectContaining({ model: expect.any(String) }), undefined)
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})
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it("should pass both signal and timeoutMs", async () => {
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const controller = new AbortController()
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mockComplete.mockResolvedValueOnce({
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choices: [{ message: { content: "response" } }],
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})
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await handler.completePrompt("test prompt", { abortSignal: controller.signal, timeoutMs: 5000 })
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expect(mockComplete).toHaveBeenCalledWith(expect.objectContaining({ model: expect.any(String) }), {
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fetchOptions: { signal: controller.signal },
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timeoutMs: 5000,
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})
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})
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})
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})

‎src/api/providers/__tests__/vscode-lm.spec.ts‎

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@@ -396,6 +396,87 @@ describe("VsCodeLmHandler", () => {
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await expect(handler.createMessage(systemPrompt, messages).next()).rejects.toThrow("API Error")
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})
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it("should bridge abortSignal to CancellationToken when signal fires", async () => {
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const systemPrompt = "You are a helpful assistant"
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const messages: Anthropic.Messages.MessageParam[] = [{ role: "user", content: "Hello" }]
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mockLanguageModelChat.sendRequest.mockResolvedValueOnce({
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stream: (async function* () {
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yield {} // eslint disable line require-yield — empty stream for abort test
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return
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})(),
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text: (async function* () {
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yield ""
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return
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})(),
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})
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const controller = new AbortController()
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controller.abort() // Immediately abort before stream starts
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await handler
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.createMessage(systemPrompt, messages, { taskId: "test", abortSignal: controller.signal })
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.next()
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// Verify cancel was called on the handler's currentRequestCancellation
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const cancellation = handler["currentRequestCancellation"] as any
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expect(cancellation).toBeDefined()
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expect(cancellation.cancel).toHaveBeenCalled()
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})
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it("should immediately cancel if abortSignal is already aborted", async () => {
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const systemPrompt = "You are a helpful assistant"
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const messages: Anthropic.Messages.MessageParam[] = [{ role: "user", content: "Hello" }]
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mockLanguageModelChat.sendRequest.mockResolvedValueOnce({
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stream: (async function* () {
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yield {} // eslint disable line require-yield — empty stream for abort test
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return
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})(),
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text: (async function* () {
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yield ""
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return
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})(),
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})
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const controller = new AbortController()
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controller.abort() // Already aborted before calling createMessage
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await handler
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.createMessage(systemPrompt, messages, { taskId: "test", abortSignal: controller.signal })
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.next()
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// Verify cancel was called on the handler's currentRequestCancellation
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const cancellation = handler["currentRequestCancellation"] as any
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expect(cancellation).toBeDefined()
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expect(cancellation.cancel).toHaveBeenCalled()
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})
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it("should dispose CancellationTokenSource in finally block on success", async () => {
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const systemPrompt = "You are a helpful assistant"
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const messages: Anthropic.Messages.MessageParam[] = [{ role: "user", content: "Hello" }]
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mockLanguageModelChat.sendRequest.mockResolvedValueOnce({
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stream: (async function* () {
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yield new vscode.LanguageModelTextPart("done")
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return
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})(),
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text: (async function* () {
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yield "done"
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return
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})(),
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})
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await handler.createMessage(systemPrompt, messages, { taskId: "test" }).next()
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// After completion, the token source is still referenced but will be cleaned up on next request
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const cancellationAfter = handler["currentRequestCancellation"] as any
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expect(cancellationAfter).toBeDefined()
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// dispose happens when ensureCleanState is called (on next request or error)
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// For now, just verify the token source exists and dispose method was not yet called
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expect(cancellationAfter.dispose).not.toHaveBeenCalled()
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})
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})
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describe("getModel", () => {

‎src/api/providers/gemini.ts‎

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@@ -304,6 +304,13 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
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...(tools.length > 0 ? { tools } : {}),
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}
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// Wire abortSignal into config. Note: per the @google/genai SDK docs,
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// `abortSignal` is client-only — Google still charges for server-side
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// compute that has already been dispatched before the signal propagates.
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if (metadata?.abortSignal) {
311+
config.abortSignal = metadata.abortSignal
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}
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// Do not pass metadata.allowedFunctionNames to Gemini. Live API testing showed
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// that allowedFunctionNames triggers a generic 400 INVALID_ARGUMENT at 26 or more
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// names. It can also

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