{"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-t150rshy","versions":[{"created_at":"2026-07-04T19:34:15Z","element_count":84,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"577c43dd8b222354d46ea34a9df2e442b7696ccd47d7ab909ada32297a0f6893","version":3},{"created_at":"2026-07-04T19:21:23Z","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":"a46a2fabeb3809b5c17eaa623f1e87ce0f42c661c85cb621c88b7f7ba1d37e3a","version":2},{"created_at":"2026-07-04T19:21:23Z","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}]}