{"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-9ul3z2cl","versions":[{"created_at":"2026-06-10T23:58:01Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8bb814b66060f10494019d81b88cf169d5df0354b49d723b94acfe857c542d6b","version":13},{"created_at":"2026-06-10T23:09:27Z","element_count":47,"note":"legacy fix: 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":"89b4d02e72c535431837c778f435f0d53ac39d0275d52953d8401f781d7256bd","version":7}]}