import datetime as dt,json,sys
from pathlib import Path
root=Path(__file__).resolve().parents[2]
source=json.loads((root/'source.json').read_text(encoding='utf-8'))
if not source.get('records'):
    print('SOURCE_INCOMPLETE: retain the last good output',file=sys.stderr);sys.exit(3)
runs=root/'runs.jsonl'
sequence=len(runs.read_text(encoding='utf-8').splitlines())+1 if runs.exists() else 1
out={'sequence':sequence,'ranAt':dt.datetime.now(dt.timezone.utc).isoformat(),'count':len(source['records']),'delivery':'local file only'}
with runs.open('a',encoding='utf-8') as f:f.write(json.dumps(out)+'\n')
candidate=root/'candidate.json';candidate.write_text(json.dumps(out,indent=2),encoding='utf-8');candidate.replace(root/'last-good.json')
print(json.dumps(out))