{"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-house-f1a1o04y","versions":[{"created_at":"2026-07-17T19:41:08Z","element_count":73,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"44b273a5219a29497de369c54b37c806030750edf755c3d7d1068e3f5ede5994","version":3},{"created_at":"2026-07-17T19:29:03Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"56776d646260f6e3888b93d76724f1b9279e7f97f7d4aa7db2db815bb32ec7e8","version":2},{"created_at":"2026-07-17T19:29:03Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}