{"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-7kg079gb","versions":[{"created_at":"2026-07-19T17:39:15Z","element_count":83,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"dfb468b246c7fdbd27ab135b229225fd237e24402b65e4f5ad705407de4c039b","version":3},{"created_at":"2026-07-19T17:33:36Z","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":"7fa5c47c532167cbbad5f77f7a405bae4aa69658d7419d7ce35b04628d7b7af0","version":2},{"created_at":"2026-07-19T17:33:36Z","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}]}