{"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-willowbrookhouse-t6k4pols","versions":[{"created_at":"2026-07-01T23:19:56Z","element_count":90,"note":"5軸GA polish 39->92 by M5 (autonomous)","saved_by":"mcp","sha256":"5a1ef3e094b3494b6b678ebf4fb54e1292a11a4b77b206c3021727327f459f51","version":3},{"created_at":"2026-07-01T23:08:56Z","element_count":101,"note":"loop3: 設計時延床 65.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6ad2406a0b8d605c1809bce8e9d1ec57821271b90c6888d3b8276de710d8e4b3","version":2},{"created_at":"2026-07-01T23:08:56Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}