{"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-willowbrookbungalow-rngnka5g","versions":[{"created_at":"2026-06-13T18:49:10Z","element_count":91,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"770415448338dd2fb08fbe463cdec72c8d8cfab4b9f0633061da1abbbd8a18d7","version":3},{"created_at":"2026-06-13T18:32:23Z","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":"ec42f632018da796a92907d5154bbd6d930409e07228b1d354a02e5002d922ba","version":2},{"created_at":"2026-06-13T18:32:22Z","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}]}