{"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-x2sxzm1n","versions":[{"created_at":"2026-06-13T21:01:12Z","element_count":71,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"10e4e80733f73c6016966a13af06bbf5eff8ede34841e7f028a011cbcca959b2","version":3},{"created_at":"2026-06-13T20:42:04Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bf2459a173bc0092d1ed6ca14eecd02aa1b1375a871959319328a0532497bbe4","version":2},{"created_at":"2026-06-13T20:42:04Z","element_count":134,"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}]}