{"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-yt630lew","versions":[{"created_at":"2026-06-13T16:29:32Z","element_count":83,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"198683bd7d4f53abe689a7f55328dbc266ec96c32bda89c6d9341f512a978198","version":3},{"created_at":"2026-06-13T16:17:54Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e8aaed4317f1859de69ec3ba92b8b4b5248e6d5280a27eeb1c39780dbb9a3118","version":2},{"created_at":"2026-06-13T16:17:48Z","element_count":130,"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}]}