diff --git a/AGENTS.md b/AGENTS.md
index 8229fed1..d91e2d35 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -11,11 +11,12 @@ This repository orchestrates multi-project agent workflows. Keep behavior projec
 5. Keep run-state path logic in `src/state.ts`.
 6. Keep CLI parsing and dispatch in `src/args.ts` and `src/index.ts`.
 7. Do not construct raw shell command strings in workflow logic; use helper modules.
-8. Keep review parsing contract stable:
+8. Keep TypeScript files under 250 lines; split files before they grow beyond that limit.
+9. Keep review parsing contract stable:
    - `RESULT: PASS|FAIL`
    - `SUMMARY: ...`
    - `BUGS_JSON: [...]`
-9. Add tests for any new CLI flag, config shape, state path, or stage transition.
+10. Add tests for any new CLI flag, config shape, state path, or stage transition.
 
 ## Quality Gates
 
diff --git a/tests/config.test.ts b/tests/config.test.ts
index 78c8da63..78a34897 100644
--- a/tests/config.test.ts
+++ b/tests/config.test.ts
@@ -272,17 +272,24 @@ describe("loadConfig", () => {
 	});
 
 	it("loads notification settings from RESEND env vars", async () => {
+		const tempDir = await mkdtemp(
+			path.join(process.cwd(), ".tmp-config-test-"),
+		);
 		process.env.RESEND_API_KEY = "re_test_key";
 		process.env.RESEND_FROM = "ADHD.ai <ops@example.com>";
 		process.env.RESEND_TO = "a@example.com,b@example.com";
-		const config = await loadConfig(process.cwd());
-		expect(config.notifications.email.enabled).toBe(true);
-		expect(config.notifications.email.resendApiKey).toBe("re_test_key");
-		expect(config.notifications.email.from).toBe("ADHD.ai <ops@example.com>");
-		expect(config.notifications.email.to).toEqual([
-			"a@example.com",
-			"b@example.com",
-		]);
+		try {
+			const config = await loadConfig(tempDir);
+			expect(config.notifications.email.enabled).toBe(true);
+			expect(config.notifications.email.resendApiKey).toBe("re_test_key");
+			expect(config.notifications.email.from).toBe("ADHD.ai <ops@example.com>");
+			expect(config.notifications.email.to).toEqual([
+				"a@example.com",
+				"b@example.com",
+			]);
+		} finally {
+			await rm(tempDir, { recursive: true, force: true });
+		}
 	});
 
 	it("supports disabling notifications even with RESEND_API_KEY", async () => {
@@ -314,12 +321,19 @@ describe("loadConfig", () => {
 	});
 
 	it("rejects missing sender when notifications are enabled", async () => {
+		const tempDir = await mkdtemp(
+			path.join(process.cwd(), ".tmp-config-test-"),
+		);
 		process.env.RESEND_API_KEY = "re_test_key";
 		process.env.RESEND_FROM = "";
 		process.env.RESEND_TO = "a@example.com";
-		await expect(loadConfig(process.cwd())).rejects.toThrow(
-			"notifications.email.from (or RESEND_FROM) is required when email notifications are enabled",
-		);
+		try {
+			await expect(loadConfig(tempDir)).rejects.toThrow(
+				"notifications.email.from (or RESEND_FROM) is required when email notifications are enabled",
+			);
+		} finally {
+			await rm(tempDir, { recursive: true, force: true });
+		}
 	});
 
 	it("rejects project-level notification overrides", async () => {