{"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-a6ky03st","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19293329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b0bef464264d995b38555488fbbcd84fb4f4e7151327e25f491e14ea34d5de92","version":19},{"created_at":"2026-06-10T13:06:00Z","element_count":73,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6256ac4c16b8dbb33093ad6ca2e7a51ca6ca5bd00eae50aa8ebe00acc4656ee9","version":4}]}