{"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-wyhs8iwn","versions":[{"created_at":"2026-07-19T17:51:45Z","element_count":82,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"7e8125aa16b6f9597b2268dbca35e69a4cb07adbf97997f43304f7320f40f19b","version":3},{"created_at":"2026-07-19T17:38:51Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"48244f59440b43aef94cd8408a021c5b8232ca41ee2e45df168d5d18f8fcfc6d","version":2},{"created_at":"2026-07-19T17:38:51Z","element_count":83,"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}]}