{"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-nrpgvbu0","versions":[{"created_at":"2026-06-11T01:05:17Z","element_count":83,"note":"5軸GA polish 45->98 by M5 (autonomous)","saved_by":"mcp","sha256":"12019f7f90371d399c4c89183eab1ca7b85e904bb6a3226a9e8eb346a0bf29e3","version":13},{"created_at":"2026-06-10T22:25:04Z","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":"c902bc87aad16d9c951c33f90d2c9e74772d6485e3bf280e5e2f3932552d3654","version":2}]}