import json, base64, pathlib
p = pathlib.Path('outputs/last_edit.json')
if not p.exists():
    print('no json')
    raise SystemExit(1)
j = json.loads(p.read_text())
b = base64.b64decode(j['image_base64'])
out = pathlib.Path('outputs/last_edit_decoded.png')
out.write_bytes(b)
print('wrote', out, 'size', out.stat().st_size)