{"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-3t1tpzju","versions":[{"created_at":"2026-06-30T19:37:01Z","element_count":73,"note":"5軸GA polish 46->96 by M5 (autonomous)","saved_by":"mcp","sha256":"0d21afaccc493e408009a73507e8275059421a29857b607f30939eb8df68e1ae","version":3},{"created_at":"2026-06-30T19:25:42Z","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":"637331a046133d114277bb90ac7a42b117a2832669344e8ff57a2d780911a5f4","version":2},{"created_at":"2026-06-30T19:25:42Z","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}]}