{"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-h0zqmq0s","versions":[{"created_at":"2026-06-13T16:42:32Z","element_count":83,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"edb0512ed1c5bb8629725c425ec5960ec5c44154dd3abd597b11494c3787da77","version":3},{"created_at":"2026-06-13T16:38:12Z","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":"fbc87eb7c3eb5c3620325591b3113fd013e09de0597389dadfecac77387371fc","version":2},{"created_at":"2026-06-13T16:38:10Z","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}]}