{"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-177eiuci","versions":[{"created_at":"2026-06-21T17:49:19Z","element_count":90,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"f0a1d9db62832e2e33984d453c8522441bc193a8cd8488e19ee3f23e657b1a80","version":3},{"created_at":"2026-06-21T17:38:15Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d556eb1085faea3b5ae8b42a591b96425376e9e6e745ac61b3559c2306f515d0","version":2},{"created_at":"2026-06-21T17:38:13Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}