{"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-q0ri58u4","versions":[{"created_at":"2026-07-03T19:41:50Z","element_count":72,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"8614f00e6636eb19e20aaf30018b832ce4d3548ebaafe2a3265d6fb35f6dc222","version":3},{"created_at":"2026-07-03T19:29:05Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"84865eeb8a67a9a4d921691b462639cbf873667f352845bd1396ebd8f0af28be","version":2},{"created_at":"2026-07-03T19:29:05Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}