{"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-ve73cd6q","versions":[{"created_at":"2026-06-13T17:52:27Z","element_count":89,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d76794a23b14c9332f38a8df310f82355ab6eab120bb81809e10bc1f69f0fd92","version":3},{"created_at":"2026-06-13T17:43:03Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4ef75e8ba8fe75d2d3f827951d4797d29d776c0c94d25cb51a1ff7ffc5679d2e","version":2},{"created_at":"2026-06-13T17:43:00Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}