fix(coding-agent): warn on Anthropic subscription auth

packages/coding-agent/test/interactive-mode-anthropic-warning.test.ts

@@ -0,0 +1,73 @@
+import { describe, expect, test, vi } from "vitest";
+import { InteractiveMode } from "../src/modes/interactive/interactive-mode.js";
+
+describe("InteractiveMode.maybeWarnAboutAnthropicSubscriptionAuth", () => {
+	test("warns once when Anthropic subscription auth is detected", async () => {
+		const fakeThis: any = {
+			anthropicSubscriptionWarningShown: false,
+			session: {
+				modelRegistry: {
+					authStorage: {
+						get: vi.fn().mockReturnValue(undefined),
+					},
+					getApiKeyForProvider: vi.fn().mockResolvedValue("sk-ant-oat01-test"),
+				},
+			},
+			showWarning: vi.fn(),
+		};
+
+		await (InteractiveMode as any).prototype.maybeWarnAboutAnthropicSubscriptionAuth.call(fakeThis, {
+			provider: "anthropic",
+		});
+		await (InteractiveMode as any).prototype.maybeWarnAboutAnthropicSubscriptionAuth.call(fakeThis, {
+			provider: "anthropic",
+		});
+
+		expect(fakeThis.showWarning).toHaveBeenCalledTimes(1);
+		expect(fakeThis.session.modelRegistry.getApiKeyForProvider).toHaveBeenCalledTimes(1);
+	});
+
+	test("warns when Anthropic OAuth is stored even if token refresh lookup would fail", async () => {
+		const fakeThis: any = {
+			anthropicSubscriptionWarningShown: false,
+			session: {
+				modelRegistry: {
+					authStorage: {
+						get: vi.fn().mockReturnValue({ type: "oauth" }),
+					},
+					getApiKeyForProvider: vi.fn().mockResolvedValue(undefined),
+				},
+			},
+			showWarning: vi.fn(),
+		};
+
+		await (InteractiveMode as any).prototype.maybeWarnAboutAnthropicSubscriptionAuth.call(fakeThis, {
+			provider: "anthropic",
+		});
+
+		expect(fakeThis.showWarning).toHaveBeenCalledTimes(1);
+		expect(fakeThis.session.modelRegistry.getApiKeyForProvider).not.toHaveBeenCalled();
+	});
+
+	test("does not warn for non-Anthropic models", async () => {
+		const fakeThis: any = {
+			anthropicSubscriptionWarningShown: false,
+			session: {
+				modelRegistry: {
+					authStorage: {
+						get: vi.fn(),
+					},
+					getApiKeyForProvider: vi.fn(),
+				},
+			},
+			showWarning: vi.fn(),
+		};
+
+		await (InteractiveMode as any).prototype.maybeWarnAboutAnthropicSubscriptionAuth.call(fakeThis, {
+			provider: "openai",
+		});
+
+		expect(fakeThis.showWarning).not.toHaveBeenCalled();
+		expect(fakeThis.session.modelRegistry.getApiKeyForProvider).not.toHaveBeenCalled();
+	});
+});