{"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-p6ut3x66","versions":[{"created_at":"2026-06-19T06:02:39Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"777305e7c9bccb310c0f0b2be10224f3ac1a0fcd24a321ef8c3412932713db1e","version":3},{"created_at":"2026-06-19T05:54:13Z","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":"0f2505a71c51fdf6ed976badbad0b88ea430341becfbdbfb7604c777fb40960e","version":2},{"created_at":"2026-06-19T05:54:12Z","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}]}