Add controlled coding agent automation

tests/test_config.py

@@ -0,0 +1,47 @@
+from pathlib import Path
+
+import pytest
+
+from lai_automation.config import Settings
+
+
+def settings(**overrides) -> Settings:
+    values = {
+        "database_host": "db",
+        "database_port": 3306,
+        "database_name": "lai",
+        "database_user": "worker",
+        "database_password": "secret",
+        "source_repository": "https://example.test/lai.git",
+        "source_branch": "main",
+        "workspace_root": Path("/tmp/workspaces"),
+        "mode": "dry-run",
+        "allow_direct_main": False,
+        "gitea_url": "https://example.test",
+        "gitea_owner": "owner",
+        "gitea_repository": "lai",
+        "gitea_token": "",
+        "gitea_username": "bot",
+        "agent_command": "aider",
+        "agent_model": "mistral/test",
+        "test_commands": ("php artisan test",),
+        "poll_seconds": 60,
+        "max_changed_files": 12,
+        "max_changed_lines": 800,
+        "stale_claim_minutes": 90,
+        "dry_run": True,
+    }
+    values.update(overrides)
+    return Settings(**values)
+
+
+def test_direct_main_requires_explicit_kill_switch() -> None:
+    config = settings(mode="direct-main", dry_run=False, gitea_token="token")
+    with pytest.raises(ValueError, match="ALLOW_DIRECT_MAIN"):
+        config.validate()
+
+
+def test_pr_requires_gitea_token() -> None:
+    config = settings(mode="pr", dry_run=False)
+    with pytest.raises(ValueError, match="GITEA_TOKEN"):
+        config.validate()