{"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-atx09jaf","versions":[{"created_at":"2026-06-10T22:57:12Z","element_count":65,"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":"6073b7baab7b6237396e1655d86bbadf1e9064309ccf696a437e7cecda91c7da","version":10},{"created_at":"2026-06-10T22:01:44Z","element_count":50,"note":"revert: houki rescan NG -> restore pre-polish elements (M5 2026-06-11)","saved_by":"mcp","sha256":"e7f12aac069a81f0f7d3e51a66880ec6674e6ff1b05b17d566c86a3434f34c22","version":4},{"created_at":"2026-06-10T19:18:53Z","element_count":91,"note":"5軸GA polish 56->96 by M5 (autonomous)","saved_by":"mcp","sha256":"0753af1ea1a082a093a7d1b57561e703ee26f9d405648eae099770859bdc4fee","version":2}]}