test(ai,coding-agent): stabilize env-sensitive test cases (#4119)

packages/ai/test/openai-codex-stream.test.ts

@@ -242,7 +242,7 @@ describe("openai-codex streaming", () => {
 		};
 
 		const result = await Promise.race([
-			streamOpenAICodexResponses(model, context, { apiKey: token }).result(),
+			streamOpenAICodexResponses(model, context, { apiKey: token, transport: "sse" }).result(),
 			new Promise<never>((_, reject) => {
 				setTimeout(() => reject(new Error("Timed out waiting for completed SSE stream")), 1000);
 			}),
@@ -301,7 +301,7 @@ describe("openai-codex streaming", () => {
 		};
 
 		const result = await Promise.race([
-			streamOpenAICodexResponses(model, context, { apiKey: token }).result(),
+			streamOpenAICodexResponses(model, context, { apiKey: token, transport: "sse" }).result(),
 			new Promise<never>((_, reject) => {
 				setTimeout(() => reject(new Error("Timed out waiting for incomplete SSE stream")), 1000);
 			}),

packages/coding-agent/test/clipboard.test.ts

@@ -54,6 +54,9 @@ function osc52Writes(): string[] {
 
 beforeEach(() => {
 	vi.unstubAllEnvs();
+	vi.stubEnv("SSH_CONNECTION", "");
+	vi.stubEnv("SSH_CLIENT", "");
+	vi.stubEnv("MOSH_CONNECTION", "");
 	stdoutWrites = [];
 	nativeResolved = false;
 	mocks.clipboard.setText.mockReset();

packages/coding-agent/test/package-manager.test.ts

@@ -160,6 +160,10 @@ Content`,
 		});
 
 		it("should resolve symlinked user and project resources once", async () => {
+			const previousHome = process.env.HOME;
+			process.env.HOME = tempDir;
+
+			try {
 				const sharedDir = join(tempDir, "shared-resources");
 				const sharedExtensionsDir = join(sharedDir, "extensions");
 				const sharedSkillsDir = join(sharedDir, "skills");
@@ -214,6 +218,13 @@ Content`,
 				expect(result.skills[0].metadata.scope).toBe("project");
 				expect(result.prompts[0].metadata.scope).toBe("project");
 				expect(result.themes[0].metadata.scope).toBe("project");
+			} finally {
+				if (previousHome === undefined) {
+					delete process.env.HOME;
+				} else {
+					process.env.HOME = previousHome;
+				}
+			}
 		});
 
 		it("should auto-discover project prompts with overrides", async () => {