{"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-r2uw9jeh","versions":[{"created_at":"2026-07-03T19:41:49Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"05fc0968409d622f91ea0067ed5b8c80f0c0462c833adcb5e8b88d76ece100c5","version":3},{"created_at":"2026-07-03T19:27:43Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3adef620a6dc31b44ae3bb766c059244fc50187b5818fbf2c5d9cd13f2a0b214","version":2},{"created_at":"2026-07-03T19:27:42Z","element_count":130,"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}]}