{"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-9xnr1ipj","versions":[{"created_at":"2026-06-13T17:52:16Z","element_count":72,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"2c521a764bfe1f88928e454ac80cc289185f4e8ea6c2e641572a93899d1912c9","version":3},{"created_at":"2026-06-13T17:45:27Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"84f8135859a9eb37c37add33aa1d034c9a9025f187b3db96b84d53ca6a7d65c9","version":2},{"created_at":"2026-06-13T17:45:26Z","element_count":87,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}