Checkpoint experiments through SWE pilot v2

scripts/verify_evidence.py

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+"""Verify byte preservation of evidence imported from the retired research repo."""
+import hashlib
+import json
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def main():
+    manifest = json.loads((ROOT / 'docs/migration/messageboard-20260908.json').read_text())
+    failures = []
+    for entry in manifest['files']:
+        path = ROOT / entry['path']
+        if not path.is_file():
+            failures.append({'path': entry['path'], 'reason': 'missing'})
+            continue
+        data = path.read_bytes()
+        if len(data) != entry['bytes'] or hashlib.sha256(data).hexdigest() != entry['sha256']:
+            failures.append({'path': entry['path'], 'reason': 'bytes changed'})
+    print(json.dumps({'checked': len(manifest['files']), 'failures': failures}, indent=2))
+    return bool(failures)
+
+
+if __name__ == '__main__':
+    raise SystemExit(main())