{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-willowcreekbungalow-uscslqs7","versions":[{"created_at":"2026-06-13T19:03:51Z","element_count":72,"note":"5軸GA polish 47->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ba4448b3eb938079b699089d273d55fb7ffdee1378d6d8aa91d7b1bcb7ae8d2a","version":3},{"created_at":"2026-06-13T18:51:01Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"18ecfc691471d078cc2bba250d3f5a8213c4ce87161f63d041d69ed923b5b0f2","version":2},{"created_at":"2026-06-13T18:51:00Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}