{"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-v3slwagy","versions":[{"created_at":"2026-07-02T21:52:04Z","element_count":71,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"b42c7f2b4199e935ba3e8d5a125ef46db6f517183d20fbc0d3a2cad12f0484b1","version":3},{"created_at":"2026-07-02T21:44:21Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a7a49325f6d64b49616b9db8602643e24a7389a954c921d392bd8137464dc7a2","version":2},{"created_at":"2026-07-02T21:44:21Z","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}]}