{"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-fv911sva","versions":[{"created_at":"2026-06-30T06:07:01Z","element_count":71,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"9bd815f16840873e45a3322e77f1917b9e7bbbd2fa72db81086b00a06bdd44e8","version":3},{"created_at":"2026-06-30T05:59:13Z","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":"ae727fc80ca8f25f000352cf7e35059eacac0b70f634621ed8cd9cc6557e9835","version":2},{"created_at":"2026-06-30T05:59:13Z","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}]}