{"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-s4eb4tm9","versions":[{"created_at":"2026-06-15T06:08:52Z","element_count":83,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"6228f4432d4667410edd12ac795abf05b13e501b2eb3bb29b5cf2134abc72f1c","version":3},{"created_at":"2026-06-15T06:01:31Z","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":"2f5bcbfe5a8cd1271b6dc3120a6e3457083e4e978bba52b95eaa9223a3e2acc4","version":2},{"created_at":"2026-06-15T06:01:30Z","element_count":86,"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}]}