{"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-hpck24s5","versions":[{"created_at":"2026-06-13T16:56:22Z","element_count":84,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"b718ed9aed07018211266fa436f0d43bde8817906ee1d0c496b32611fcf21ca9","version":3},{"created_at":"2026-06-13T16:48:56Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3bc936fa9c1265b5e4732d770434c28407b61c528dd9d1d42d05cd958ba2f9b4","version":2},{"created_at":"2026-06-13T16:48:54Z","element_count":85,"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}]}