Function writeMeta

src/core/cocos3x/engine3x.js:633–650

(outBase, uuid, className, wasCcon, packRef)

        if (r) return r;
      }
      return null;
    }
    for (const k of Object.keys(obj)) {
      const r = visit(obj[k], depth + 1);
      if (r) return r;
    }
    return null;
  };
  return visit(doc, 0);
}

async function decodeCconToDoc(buf, outBase) {
  const decoded = decodeCcon(buf);
  // Both v1 (JSON) and v2 (notepack) yield a `document` when decodable.
  if (decoded.document) {
    // Persist chunks alongside the JSON so mesh/animation payloads are not lost.
    for (let i = 0; i < decoded.chunks.length; i += 1) {
      await writeFile(`${outBase}.chunk${i}.bin`, decoded.chunks[i]);
    }
    return decoded.document;
  }