{"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-odysseyhouse-svigc084","versions":[{"created_at":"2026-07-18T17:23:06Z","element_count":72,"note":"5軸GA polish 39->90 by M5 (autonomous)","saved_by":"mcp","sha256":"73cbbed96c8a7f26e06c6da32057036aec73acf6e39e9c8617788cf7d386425f","version":3},{"created_at":"2026-07-18T17:11:15Z","element_count":119,"note":"loop3: 設計時延床 60.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"703ca0cd80cbf84e7f00193a8c3894184f0487f8b324b4a140b7ef08d6d04125","version":2},{"created_at":"2026-07-18T17:11:15Z","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}]}