{"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-7gehlt2x","versions":[{"created_at":"2026-06-13T14:48:46Z","element_count":73,"note":"5軸GA polish 39->91 by M5 (autonomous)","saved_by":"mcp","sha256":"bbe784a201cd478678c1777baf2c10a03d7a4b389a4c342c107be81798d2827f","version":3},{"created_at":"2026-06-13T14:41:43Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f76fea14383cf0b5fe3c3bf82d6b9c0e97c78eaa6e4a2e48269fe34074a8bd50","version":2},{"created_at":"2026-06-13T14:41:43Z","element_count":119,"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}]}