{"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-fenyrvbt","versions":[{"created_at":"2026-06-10T22:55:25Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87413760→quote24557037 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"fec8486b0d7626a5a32be20d811c808d3996fd089fdaa7f49c460eefcf3989a0","version":10},{"created_at":"2026-06-10T18:13:16Z","element_count":73,"note":"5軸GA polish 61->95 by M5 (autonomous)","saved_by":"mcp","sha256":"405826875bcae88bcef052f073eab752f8b90123f49ff4a66722849bcb477815","version":3}]}