{"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-znvnvd3c","versions":[{"created_at":"2026-06-27T06:11:04Z","element_count":72,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"21d62bcfe2fd6b14e997ffcf0f37c2dcc55a3c6d391dc5e3c46c3e1842441bc5","version":3},{"created_at":"2026-06-27T06:04:41Z","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":"1e3c8ad3ee7418af244cae2b85e2062641236b8a7265f0c27a611aafa6f2548b","version":2},{"created_at":"2026-06-27T06:04:41Z","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}]}