{"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-h104wgr7","versions":[{"created_at":"2026-06-13T17:24:46Z","element_count":90,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"e1b00d81411200ae8441a05037a3832ba0b300e095f5071ac6a748aa4cb38c3e","version":3},{"created_at":"2026-06-13T17:09:29Z","element_count":101,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"181836299d642f8f809c96eef06817a7d03ddf359e3e1d13b0d5ef257b972b6a","version":2},{"created_at":"2026-06-13T17:09:27Z","element_count":101,"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}]}