Record exact native deletion evidence and resize constraint experiments

harness/experiments/delete-native-f7-20260912/checkpoint.py

@@ -0,0 +1,37 @@
+from pathlib import Path
+from datetime import datetime, timezone
+import hashlib
+import json
+import shutil
+import subprocess
+import sys
+
+root = Path(__file__).resolve().parent.parent
+trial = root / '.local/native-qa/delete-20260912'
+name, work_name, mode, baseline_name, *extra = sys.argv[1:]
+assert name.replace('-', '').isalnum() and mode in ['same', 'removed']
+source = (trial / work_name).resolve()
+baseline = (trial / baseline_name).resolve()
+assert source.is_relative_to(trial) and baseline.is_relative_to(trial)
+assert source.is_dir() and baseline.is_dir()
+dest = trial / 'checkpoints' / name
+assert not dest.exists()
+shutil.copytree(source, dest)
+checker = root / '.local/native-qa/delete-oracle-warning-fix-42511f0/delete-oracle-warning-fix-42511f0.exe'
+command = [str(checker), mode, str(baseline / 'project.arcadia'), str(dest / 'project.arcadia'), *extra]
+run = subprocess.run(command, cwd=root, capture_output=True)
+files = []
+for file in sorted(dest.rglob('*')):
+    if file.is_file():
+        raw = file.read_bytes()
+        rel = file.relative_to(dest)
+        assert (source / rel).read_bytes() == raw
+        files.append({'path': rel.as_posix(), 'bytes': len(raw), 'sha256': hashlib.sha256(raw).hexdigest()})
+log = trial / 'evidence' / (name + '.log')
+log.write_bytes(run.stdout + run.stderr)
+record = {'utc': datetime.now(timezone.utc).isoformat(), 'snapshot': str(dest), 'command': command,
+    'checker_sha256': hashlib.sha256(checker.read_bytes()).hexdigest(), 'exit': run.returncode, 'files': files}
+(trial / 'evidence' / (name + '.json')).write_text(json.dumps(record, indent=2) + '\n', encoding='utf-8', newline='\n')
+print(run.stdout.decode('utf-8', errors='replace'))
+print(json.dumps({'name': name, 'exit': run.returncode, 'files': len(files), 'diagnostic_log': str(log)}))
+sys.exit(run.returncode)