{"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-c3deek6d","versions":[{"created_at":"2026-06-30T06:19:43Z","element_count":72,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"5a7f457b3e032e786b05403119c4ae6e275f4a7d3871eb236f91e3067dfd7d9c","version":3},{"created_at":"2026-06-30T06:14:10Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9bcf5a648f1e9c813a330f369e68de992c09414f097fc5182004379eed763b31","version":2},{"created_at":"2026-06-30T06:14:10Z","element_count":119,"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}]}