from pathlib import Path
import json,hashlib,subprocess
R=Path('/home/jakub/devel/escapistsrereintroduced');B=Path('/tmp/erri-bmp-native-2103')
def sha(p):
 h=hashlib.sha256()
 with p.open('rb') as f:
  while chunk:=f.read(1024*1024):h.update(chunk)
 return h.hexdigest()
def verify(root,manifest,exact=False):
 data=json.loads(manifest.read_text()); missing=[];changed=[]
 for n,h in data.items():
  p=root/n
  if not p.is_file():missing.append(n)
  elif sha(p)!=h:changed.append(n)
 actual={str(p.relative_to(root)) for p in root.rglob('*') if p.is_file()} if exact else set(data)
 return {'missing':missing,'changed':changed,'count':len(data),'unexpected':sorted(actual-set(data)),'manifest_sha256':sha(manifest)}
original=verify(Path('/home/jakub/devel/escapists'),Path('/tmp/erri-heartbeat-20260930-1542-reference.json'))
candidates={n:verify(R/'.build'/('playtest-2026-10-03-'+n),R/'docs/evidence'/('playtest-refresh-2026-10-03-'+n)/'candidate-sha256.json',True) for n in ['crash-start','depot-mines','ground-supply','mine-safety','mounted-pair']}
staged=hashlib.sha256(subprocess.check_output(['git','diff','--cached','--binary'],cwd=R)).hexdigest()
baseline=json.loads((B/'baseline.json').read_text())
assert staged==baseline['staged_diff_sha256']
for result in [original,*candidates.values()]:assert not result['missing'] and not result['changed'] and not result['unexpected'],result
(B/'preservation.json').write_text(json.dumps({'complete':True,'original':original,'candidates':candidates,'staged_diff_sha256':staged},indent=2)+'\n')
print('Original533, five sealed candidates and staged diff unchanged')