{"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-j9ik0u17","versions":[{"created_at":"2026-06-20T06:25:53Z","element_count":73,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e5c9359449c46a5b01587b444ef96a119bb990543bd36c6ba4cc9ed672ca90cf","version":3},{"created_at":"2026-06-20T06:18:43Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9d4e8ece51d57d158f3748aafc70a1d7fa2e3452ebc2aaf94b67dc5776898989","version":2},{"created_at":"2026-06-20T06:18:40Z","element_count":85,"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}]}