{"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-sterlinghillhouse-of8kvjak","versions":[{"created_at":"2026-07-03T10:12:24Z","element_count":71,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"c6e1cc2916873c4c0f725125cb542ed60c81235fd161a2eb7c37ac2796b6f6d1","version":3},{"created_at":"2026-07-03T10:09:35Z","element_count":119,"note":"loop3: 設計時延床 48.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"80d9f675955f1954c1ace7ebe39663e3e55df91fdb040e91d2df82fdff498b6b","version":2},{"created_at":"2026-07-03T10:09:34Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}