{"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-uazuh1y0","versions":[{"created_at":"2026-06-16T06:11:46Z","element_count":72,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"9115824ff7aa581afdfbdfc54a28325c373d1a3f983accc1d8d09c2d8078cab1","version":3},{"created_at":"2026-06-16T06:08:19Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9d101f3597d765abec3e7a48df7a6832e02bd143560474b8ca17f5adaa6ccece","version":2},{"created_at":"2026-06-16T06:08:17Z","element_count":88,"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}]}