{"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-ab3ukxdd","versions":[{"created_at":"2026-07-16T07:24:05Z","element_count":83,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"dfb468b246c7fdbd27ab135b229225fd237e24402b65e4f5ad705407de4c039b","version":3},{"created_at":"2026-07-16T07:18:48Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5da67a3510d054a3dff87864fba8f33c74b99f8eb4754a13b7e4f21423f9f96b","version":2},{"created_at":"2026-07-16T07:18:47Z","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}]}