{"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-9tmtkmxl","versions":[{"created_at":"2026-06-10T22:54:08Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"73d5661ac15561304a2a6e045a9794d84c43ecf92cf8c7688d48c1d1e5334567","version":11},{"created_at":"2026-06-10T22:01:31Z","element_count":48,"note":"revert: houki rescan NG -> restore pre-polish elements (M5 2026-06-11)","saved_by":"mcp","sha256":"efbbcf0681949e993af38798757761bd3b66b183233aa9eafa96f2e93367f310","version":5},{"created_at":"2026-06-10T17:23:15Z","element_count":89,"note":"5軸GA polish 60->96 by M5 (autonomous)","saved_by":"mcp","sha256":"006d5ba3e04393035b9814c8831ac26d97d750cea1be9481f16c91f4ec422814","version":2}]}