{"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-hodd2lgt","versions":[{"created_at":"2026-06-11T01:39:32Z","element_count":83,"note":"5軸GA polish 45->98 by M5 (autonomous)","saved_by":"mcp","sha256":"99e35324016814721f74de01b8da880c47b2376a6244265b323261c390cd93c9","version":7},{"created_at":"2026-06-10T23:51:45Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8b89dcebc1a01f252fe231d490afb1c1bed59771af491933bbacb770cec418e4","version":2}]}