{"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-asqg15pr","versions":[{"created_at":"2026-07-06T19:43:36Z","element_count":85,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"21fc519acae3264ab0194f3e41c883c102ea13586705d41ffbbd285481696892","version":3},{"created_at":"2026-07-06T19:35:58Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f966089c963fbb90e06a1dde82b980baae8d0af5827cebeb7dc6a17a4e93f406","version":2},{"created_at":"2026-07-06T19:35:58Z","element_count":107,"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}]}