migration: prove standalone maintenance and correct visual evidence

app/tools/verify_baseline.py

@@ -21,6 +21,39 @@ def run(label: str, command: list[str]) -> None:
     subprocess.run(command, cwd=ROOT, check=True)
 
 
+def python_test_command(preservation_baseline: bool | None = None) -> list[str]:
+    if preservation_baseline is None:
+        preservation_baseline = (ROOT.parent / "static" / "app.js").is_file()
+    if preservation_baseline:
+        return [sys.executable, "-m", "unittest", "discover", "-s", "tests"]
+    modules = [
+        f"tests.{path.stem}"
+        for path in sorted((ROOT / "tests").glob("test_*.py"))
+        if not path.stem.startswith("test_preservation_")
+    ]
+    if not modules:
+        raise RuntimeError("no standalone candidate tests found")
+    return [sys.executable, "-m", "unittest", *modules]
+
+
+def verify_git_diff() -> None:
+    result = subprocess.run(
+        ["git", "rev-parse", "--show-toplevel"],
+        cwd=ROOT,
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    if result.returncode != 0:
+        print("\n[patch] skipped: standalone export is not a Git checkout")
+        return
+    repository_root = Path(result.stdout.strip()).resolve()
+    if ROOT != repository_root / "app":
+        print("\n[patch] skipped: standalone export is outside the canonical app path")
+        return
+    run("patch", ["git", "diff", "--check"])
+
+
 def verify_database() -> None:
     database = ROOT / "data" / "review.db"
     if not database.exists():
@@ -97,7 +130,7 @@ def main() -> int:
     )
     args = parser.parse_args()
 
-    run("python", [sys.executable, "-m", "unittest", "discover", "-s", "tests"])
+    run("python", python_test_command())
     run(
         "api-registry",
         [sys.executable, "tools/build_api_registry.py", "--check"],
@@ -117,7 +150,7 @@ def main() -> int:
             "javascript",
             [node, "--check", script.relative_to(ROOT).as_posix()],
         )
-    run("patch", ["git", "diff", "--check"])
+    verify_git_diff()
     verify_database()
 
     if args.e2e: