Add controlled coding agent automation

tests/test_policy.py

@@ -0,0 +1,41 @@
+from dataclasses import replace
+
+from test_config import settings
+
+from lai_automation.git import ChangeSummary
+from lai_automation.policy import evaluate_changes
+
+
+def test_policy_accepts_small_application_change() -> None:
+    result = evaluate_changes(
+        ChangeSummary(("app/Services/Example.php", "tests/Feature/ExampleTest.php"), 40, 5),
+        settings(),
+    )
+    assert result.allowed
+
+
+def test_policy_rejects_secrets_and_vendor_paths() -> None:
+    result = evaluate_changes(ChangeSummary((".env", "vendor/foo.php"), 2, 0), settings())
+    assert not result.allowed
+    assert len(result.errors) == 2
+
+
+def test_direct_main_blocks_validator_and_migrations() -> None:
+    config = replace(
+        settings(),
+        mode="direct-main",
+        dry_run=False,
+        allow_direct_main=True,
+        gitea_token="token",
+    )
+    result = evaluate_changes(
+        ChangeSummary(("app/Services/SQLValidatorService.php", "database/migrations/new.php"), 10, 2),
+        config,
+    )
+    assert not result.allowed
+
+
+def test_policy_rejects_symlinks(tmp_path) -> None:
+    (tmp_path / "link.php").symlink_to("/etc/passwd")
+    result = evaluate_changes(ChangeSummary(("link.php",), 1, 0), settings(), tmp_path)
+    assert not result.allowed