fix.py

import json
from pathlib import Path

KEEP_KEYS = {"id", "nb", "nn"}

input_dir = Path(".")
output_dir = Path("cleaned_minimal")
output_dir.mkdir(exist_ok=True)

for path in input_dir.glob("*.jsonl"):
    out_path = output_dir / path.name
    with path.open("r", encoding="utf-8") as fin, out_path.open("w", encoding="utf-8") as fout:
        for line in fin:
            obj = json.loads(line)
            filtered = {k: v for k, v in obj.items() if k in KEEP_KEYS}
            fout.write(json.dumps(filtered, ensure_ascii=False) + "\n")
    print(f"[✓] Stripped {path.name}")