{"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-theardenhouse-0nv8x8hs","versions":[{"created_at":"2026-06-11T04:23:32Z","element_count":90,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"cdc2abc8e292a0017674e41aaea69071f18118d7b9f9cbecbcedbd1cd82de582","version":3},{"created_at":"2026-06-11T04:11:57Z","element_count":147,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"4dbd255ffa5b3e8e659f14e33c0af8fd8787ef60fa889bf3567b6680ba584968","version":2}]}