{"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-cm8f3yvt","versions":[{"created_at":"2026-06-11T03:31:10Z","element_count":85,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"21fc519acae3264ab0194f3e41c883c102ea13586705d41ffbbd285481696892","version":3},{"created_at":"2026-06-11T03:25:54Z","element_count":109,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e7f25408f42c59c6cdf5bf414808fbdbf2bcb58872ade3f9a5e991d1e4c67f01","version":2}]}