rebuild(stage-15): complete governance and handoff

next/tests/test_database_tool.py

@@ -1,5 +1,6 @@
 import pytest
 
+from backend.database import MIGRATIONS, Database, MigrationRunner
 from tools.database import main
 
 
@@ -14,6 +15,19 @@ def test_status_uses_configured_data_directory(tmp_path, monkeypatch, capsys) ->
     assert (tmp_path / "xiaobai.db").exists()
 
 
+def test_status_reads_an_existing_schema_without_mutating_history(
+    tmp_path, monkeypatch, capsys
+) -> None:
+    database_path = tmp_path / "existing.db"
+    MigrationRunner(Database(database_path)).upgrade(MIGRATIONS)
+    monkeypatch.setenv("APP_ENV", "test")
+    monkeypatch.setenv("APP_DATABASE_PATH", str(database_path))
+
+    assert main(["status"]) == 0
+
+    assert capsys.readouterr().out.strip() == "available=true schema_version=10"
+
+
 def test_downgrade_requires_explicit_confirmation(tmp_path, monkeypatch) -> None:
     monkeypatch.setenv("APP_ENV", "test")
     monkeypatch.setenv("APP_DATA_DIR", str(tmp_path))