{"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-04ritv40","versions":[{"created_at":"2026-07-03T19:29:29Z","element_count":84,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"7506eaa51fc6ea3c5118e3428aa5779b3b57da6f0a3b21185289c5c44919e202","version":3},{"created_at":"2026-07-03T19:24:49Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6eec02b6f09a366f7a730dc4342849dd2e25f6760196f74131b909a462ca6d6f","version":2},{"created_at":"2026-07-03T19:24:49Z","element_count":126,"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}]}