{"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-cbigsdtw","versions":[{"created_at":"2026-06-13T17:09:29Z","element_count":72,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"925f281d4d3411d2c928dd590ca21b22a9efc730117df17654e2bbe02c40aaab","version":3},{"created_at":"2026-06-13T16:59:54Z","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":"115fc382ed09fc51a3b0b217d715909080b4cc576dd476e0b5cf55049d35bc2e","version":2},{"created_at":"2026-06-13T16:59:53Z","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}]}