{"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-house-5ofeocsf","versions":[{"created_at":"2026-06-11T00:48:56Z","element_count":83,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"16960c36384cfd31dd6f3c5a0f98f5c431d8a9e1399768ae9538607808968eb8","version":15},{"created_at":"2026-06-10T22:05:08Z","element_count":44,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a770adbf9af8572eb42ce2bab3acb42a5393d210f3761bc5cd173a4949a64b49","version":2}]}