{"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-znzmp83l","versions":[{"created_at":"2026-07-06T06:21:27Z","element_count":70,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"fb0894aa71f63ed7d8e02059f6540dd6788443fdfac1bc13d80a1e3356424f2e","version":3},{"created_at":"2026-07-06T06:11:04Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"748444d13326db48dfdd0868798ea222320e1313b4ff7f1307962a83b920011e","version":2},{"created_at":"2026-07-06T06:11:03Z","element_count":88,"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}]}