{"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-u2902vd8","versions":[{"created_at":"2026-06-14T06:08:44Z","element_count":85,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"d86dfe0b8b04298e14bd48259c7f486f4d33ee7b5f7fdcb75f116fb1c7b937d9","version":3},{"created_at":"2026-06-14T06:02:36Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b3034d26c6efbbafe8daf4838b6c2b110d1892d490de90e4e4ac8ad6bceada6b","version":2},{"created_at":"2026-06-14T06:02:34Z","element_count":83,"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}]}