{"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-watrn028","versions":[{"created_at":"2026-06-13T15:02:21Z","element_count":85,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"f146b70215f1cb08575991bc51a693900fe5a84fd5ca12dc512c2e9753badcae","version":3},{"created_at":"2026-06-13T14:56:42Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"713bc0d855b47f701d4343576a4b7ce000ce20e48e2d0f392f4df49df2f99eb1","version":2},{"created_at":"2026-06-13T14:56:38Z","element_count":101,"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}]}