{"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-ig7e7igh","versions":[{"created_at":"2026-07-01T19:36:02Z","element_count":91,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"0f933af033484ea60266bb6be4f5d916a0410cfc2b5fe10acc8703801adbadad","version":3},{"created_at":"2026-07-01T19:29:28Z","element_count":86,"note":"loop3: 設計時延床 45.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bf5b2cee4e9a78f04e572fa9e4a5471ca5f97c596ee10d230790c35e7447b032","version":2},{"created_at":"2026-07-01T19:29:28Z","element_count":86,"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}]}