{"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-nfdht5w0","versions":[{"created_at":"2026-06-26T19:44:24Z","element_count":68,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"573be96de327c19d90ba989f81f92bcabb4d73e078165a9277fc74f350a11db7","version":3},{"created_at":"2026-06-26T19:31:54Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6dd1d1966cb6f84ced90a89a84af5846b30ce9e323e358fe3ffe23aada836783","version":2},{"created_at":"2026-06-26T19:31:54Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}