{"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-2wgkr2wh","versions":[{"created_at":"2026-06-13T16:56:20Z","element_count":72,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"c36795ee00b041aeffcab7916de131689babf06abc5e14f261e0cf5a52e7dd9b","version":3},{"created_at":"2026-06-13T16:40:59Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1a4621596069acfe2a09fb8c61458be9e55eacff298f947cb865f25f13fb6cdf","version":2},{"created_at":"2026-06-13T16:40:59Z","element_count":101,"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}]}