Improve coding agent reliability

tests/test_agent.py

@@ -11,4 +11,5 @@ def test_aider_command_cannot_mutate_git_configuration_or_send_analytics() -> No
     assert "--no-gitignore" in command
     assert "--no-analytics" in command
     assert "--no-auto-commits" in command
-    assert command.count("/dev/null") == 2
+    assert command.count("/dev/null") == 2
+    assert command[-4:] == ["--edit-format", "diff", "--timeout", "60"]

tests/test_policy.py

@@ -15,9 +15,12 @@ def test_policy_accepts_small_application_change() -> None:
 
 
 def test_policy_rejects_secrets_and_vendor_paths() -> None:
-    result = evaluate_changes(ChangeSummary((".env", "vendor/foo.php"), 2, 0), settings())
+    result = evaluate_changes(
+        ChangeSummary((".env", "vendor/foo.php", ".aider.tags.cache.v4/cache.db"), 3, 0),
+        settings(),
+    )
     assert not result.allowed
-    assert len(result.errors) == 2
+    assert len(result.errors) == 3
 
 
 def test_direct_main_blocks_validator_and_migrations() -> None:

tests/test_prompt.py

@@ -30,6 +30,7 @@ def test_task_contains_constraints_and_redacted_report() -> None:
     assert "secret-value" not in task
     assert "admin@example.com" not in task
     assert "Do not commit or push" in task
+    assert "never mock or stub the behavior being tested" in task
 
 
 def test_redact_removes_extended_credentials() -> None: