{"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-5d49dp1k","versions":[{"created_at":"2026-06-16T06:46:13Z","element_count":71,"note":"5軸GA polish 43->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b69e424a25f78673cc5f90d181d75ef90a696e4abf6391a88005e03ec697e8f6","version":3},{"created_at":"2026-06-16T06:37:31Z","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":"80ad1e39beaa210bafbcc7ae812c4b469bec89fb4c257bb3b6709ec9ad12c706","version":2},{"created_at":"2026-06-16T06:37:30Z","element_count":105,"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}]}