{"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-odysseysquarebungalo-f41i5mpc","versions":[{"created_at":"2026-06-27T16:58:52Z","element_count":88,"note":"5軸GA polish 38->93 by M5 (autonomous)","saved_by":"mcp","sha256":"531c9a3be7738cb95f0082eac5f22eeb03d5cca2fdcdbae59efb090be64c4344","version":3},{"created_at":"2026-06-27T16:55:20Z","element_count":83,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"82282597a80813856789fe47daf7384a3aa0e0d056fa5ab147973b5d5210f21b","version":2},{"created_at":"2026-06-27T16:55:20Z","element_count":83,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}