{"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-xhnp3idh","versions":[{"created_at":"2026-06-30T06:19:43Z","element_count":89,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"49bc76aa19987ed4d8254d1221277b64aa5f5f9455ea0c44963cdadc0917c525","version":3},{"created_at":"2026-06-30T06:07:17Z","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":"33726796265b8d9451c672bd63578acd90fa640a2ab039b1cc6cd70ba3774b53","version":2},{"created_at":"2026-06-30T06:07:17Z","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}]}