feat(api): abort signal support for opencode-go, unbound, vercel-ai-gateway, zoo-gateway

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

@@ -1,18 +1,27 @@
 import { Anthropic } from "@anthropic-ai/sdk"
-import OpenAI from "openai"
+import OpenAI, { APIConnectionTimeoutError, APIUserAbortError } from "openai"
 
 import { UnboundHandler } from "../unbound"
 import { asyncStreamFrom, collectStream } from "../../../test-utils/stream"
 import { clearAllMocks } from "../../../test-utils/reset"
+import { makeCreateMessageMetadata } from "../../../test-utils/api"
 
-vi.mock("openai", () => {
-	const createMock = vi.fn()
+// Single hoisted mock shared by the `openai` factory and every test so tests
+// can configure the SDK `create` call without untyped access casts.
+const sharedMockCreate = vi.hoisted(() => vi.fn())
+
+// The real SDK error classes are re-exported alongside the mocked client so
+// tests can emulate the SDK's abort/timeout rejections (APIUserAbortError,
+// APIConnectionTimeoutError) and the provider's instanceof checks resolve.
+vi.mock("openai", async () => {
+	const actual = await vi.importActual<typeof import("openai")>("openai")
 	return {
+		...actual,
 		default: vi.fn(function () {
 			return {
 				chat: {
 					completions: {
-						create: createMock,
+						create: sharedMockCreate,
 					},
 				},
 			}
@@ -175,6 +184,7 @@ describe("UnboundHandler", () => {
 					mode: "architect",
 				},
 			}),
+			expect.objectContaining({ signal: expect.any(AbortSignal) }),
 		)
 	})
 
@@ -195,6 +205,225 @@ describe("UnboundHandler", () => {
 			expect.objectContaining({
 				messages: [{ role: "system", content: "Write a haiku" }],
 			}),
+			{},
+		)
+	})
+
+	it("completePrompt should pass abort signal through to client", async () => {
+		const controller = new AbortController()
+		sharedMockCreate.mockResolvedValue({
+			choices: [{ message: { content: "completed text" } }],
+		})
+
+		const handler = new UnboundHandler({
+			unboundApiKey: "test-key",
+			unboundModelId: "openai/gpt-4o",
+		})
+
+		await handler.completePrompt("Write a haiku", { abortSignal: controller.signal })
+		expect(sharedMockCreate).toHaveBeenCalledWith(
+			expect.objectContaining({ model: expect.any(String) }),
+			expect.objectContaining({ signal: controller.signal }),
+		)
+	})
+
+	it("completePrompt should pass timeout through to client", async () => {
+		sharedMockCreate.mockResolvedValue({
+			choices: [{ message: { content: "completed text" } }],
+		})
+
+		const handler = new UnboundHandler({
+			unboundApiKey: "test-key",
+			unboundModelId: "openai/gpt-4o",
+		})
+
+		await handler.completePrompt("Write a haiku", { timeoutMs: 5000 })
+		expect(sharedMockCreate).toHaveBeenCalledWith(
+			expect.objectContaining({ model: expect.any(String) }),
+			expect.objectContaining({ timeout: 5000 }),
+		)
+	})
+
+	it("completePrompt should omit the timeout option when timeoutMs is 0", async () => {
+		// The OpenAI SDK treats timeout: 0 as an immediate abort, so the
+		// "disabled" value must never be forwarded — assert the absence of
+		// the option (a forwarded timeout: 0 would fail this assertion).
+		sharedMockCreate.mockResolvedValue({
+			choices: [{ message: { content: "completed text" } }],
+		})
+
+		const handler = new UnboundHandler({
+			unboundApiKey: "test-key",
+			unboundModelId: "openai/gpt-4o",
+		})
+
+		await handler.completePrompt("Write a haiku", { timeoutMs: 0 })
+		const call = sharedMockCreate.mock.calls[sharedMockCreate.mock.calls.length - 1]
+		const requestOptions = call[1] as { timeout?: number } | undefined
+		expect(requestOptions).not.toHaveProperty("timeout")
+	})
+
+	it("completePrompt should preserve abort identity when the caller aborts", async () => {
+		// Emulate the OpenAI SDK: an aborted request signal rejects with
+		// APIUserAbortError ("Request was aborted." — the trailing period would
+		// fail task-level abort detection, so the provider must normalize it).
+		sharedMockCreate.mockImplementation(async (_params: unknown, options: { signal?: AbortSignal }) => {
+			if (options?.signal?.aborted) {
+				throw new APIUserAbortError()
+			}
+			throw new Error("boom")
+		})
+
+		const handler = new UnboundHandler({
+			unboundApiKey: "test-key",
+			unboundModelId: "openai/gpt-4o",
+		})
+		const controller = new AbortController()
+		controller.abort()
+
+		const error = await handler.completePrompt("Write a haiku", { abortSignal: controller.signal }).then(
+			() => undefined,
+			(e: unknown) => e,
 		)
+		expect(error).toMatchObject({ name: "AbortError" })
+		expect((error as Error).message.endsWith("aborted")).toBe(true)
+		expect((error as Error).message).not.toContain("completion error")
+	})
+
+	it("completePrompt should surface request timeouts as an AbortError", async () => {
+		// Emulate the OpenAI SDK: when the request timeout fires, the SDK
+		// surfaces APIConnectionTimeoutError ("Request timed out.") once retries
+		// are exhausted — verified against openai v5.23.2 against a hung server.
+		sharedMockCreate.mockImplementation(async (_params: unknown, options: { timeout?: number }) => {
+			await new Promise((resolve) => setTimeout(resolve, options?.timeout ?? 50))
+			throw new APIConnectionTimeoutError()
+		})
+
+		const handler = new UnboundHandler({
+			unboundApiKey: "test-key",
+			unboundModelId: "openai/gpt-4o",
+		})
+
+		const error = await handler.completePrompt("Write a haiku", { timeoutMs: 50 }).then(
+			() => undefined,
+			(e: unknown) => e,
+		)
+		expect(error).toMatchObject({ name: "AbortError" })
+		expect((error as Error).message.endsWith("aborted")).toBe(true)
+		expect((error as Error).message).not.toContain("completion error")
+	})
+	it("completePrompt should work without options (backward compatible)", async () => {
+		sharedMockCreate.mockResolvedValue({
+			choices: [{ message: { content: "completed text" } }],
+		})
+
+		const handler = new UnboundHandler({
+			unboundApiKey: "test-key",
+			unboundModelId: "openai/gpt-4o",
+		})
+
+		const result = await handler.completePrompt("Write a haiku")
+		expect(result).toBe("completed text")
+	})
+
+	describe("createMessage abort signal bridging", () => {
+		it("rejects the request with an AbortError when the external signal is already aborted", async () => {
+			let requestError: unknown
+			sharedMockCreate.mockImplementation(async () => {
+				// The real SDK rejects with an AbortError when its request signal is aborted.
+				requestError = new DOMException("The operation was aborted.", "AbortError")
+				throw requestError
+			})
+
+			const controller = new AbortController()
+			controller.abort()
+
+			const handler = new UnboundHandler({
+				unboundApiKey: "test-key",
+				unboundModelId: "openai/gpt-4o",
+			})
+
+			const stream = handler.createMessage(
+				"system",
+				[{ role: "user", content: "hi" }],
+				makeCreateMessageMetadata({ abortSignal: controller.signal }),
+			)
+
+			// The bridge surfaces a DOM-standard AbortError (series standard)
+			// instead of the wrapped completion error.
+			await expect(collectStream(stream)).rejects.toMatchObject({
+				name: "AbortError",
+				message: "Unbound request aborted",
+			})
+			expect(requestError).toMatchObject({ name: "AbortError" })
+		})
+
+		it("aborts the in-flight request when the external signal fires mid-stream", async () => {
+			let capturedSignal: AbortSignal | undefined
+			sharedMockCreate.mockImplementation(async (_params: unknown, options: { signal?: AbortSignal }) => {
+				capturedSignal = options?.signal
+				return (async function* () {
+					yield { choices: [{ delta: { content: "partial" } }] }
+					await new Promise((_resolve, reject) => {
+						const onAbort = () => reject(new DOMException("The operation was aborted.", "AbortError"))
+						options?.signal?.addEventListener("abort", onAbort, { once: true })
+					})
+				})()
+			})
+
+			const controller = new AbortController()
+			const handler = new UnboundHandler({
+				unboundApiKey: "test-key",
+				unboundModelId: "openai/gpt-4o",
+			})
+
+			const consumed = collectStream(
+				handler.createMessage(
+					"system",
+					[{ role: "user", content: "hi" }],
+					makeCreateMessageMetadata({ abortSignal: controller.signal }),
+				),
+			)
+
+			// Let the request start and the first chunk be yielded before aborting.
+			await new Promise((resolve) => setTimeout(resolve, 25))
+			controller.abort()
+
+			await expect(consumed).rejects.toMatchObject({ name: "AbortError" })
+			expect(capturedSignal?.aborted).toBe(true)
+		})
+
+		it("detaches the bridged abort listener when the request completes normally", async () => {
+			// The listener is added with { once: true }, so it only detaches on
+			// abort. A task-scoped signal spanning many requests must not
+			// accumulate a listener per request: assert explicit removal after a
+			// normal (non-aborted) completion.
+			sharedMockCreate.mockImplementation(async () =>
+				asyncStreamFrom([
+					{ choices: [{ delta: { content: "ok" } }] },
+					{ choices: [{ delta: {} }], usage: { prompt_tokens: 1, completion_tokens: 1 } },
+				]),
+			)
+
+			const controller = new AbortController()
+			const removeListenerSpy = vi.spyOn(controller.signal, "removeEventListener")
+
+			const handler = new UnboundHandler({
+				unboundApiKey: "test-key",
+				unboundModelId: "openai/gpt-4o",
+			})
+
+			const chunks = await collectStream(
+				handler.createMessage(
+					"system",
+					[{ role: "user", content: "hi" }],
+					makeCreateMessageMetadata({ abortSignal: controller.signal }),
+				),
+			)
+
+			expect(chunks).toContainEqual({ type: "text", text: "ok" })
+			expect(removeListenerSpy).toHaveBeenCalledWith("abort", expect.any(Function))
+			expect(controller.signal.aborted).toBe(false)
+		})
 	})
 })