{"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-37ca9icx","versions":[{"created_at":"2026-06-11T00:31:43Z","element_count":91,"note":"5軸GA polish 47->98 by M5 (autonomous)","saved_by":"mcp","sha256":"df503f90f0297ac86bb3f36cb5703997dff2c3917570e33cfbdfdaf604705212","version":15},{"created_at":"2026-06-10T21:54:36Z","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":"cc388f1071758a27321d3042c3cec054d35e167d187297c0cb1b09ce8c411d9b","version":2}]}