{"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-2r5vajj6","versions":[{"created_at":"2026-06-10T22:52:43Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→quote23449367 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"53dc22ac68531afa028b2f8b160a91b09e30f268ef6280d9d10ed32e53b61c64","version":12},{"created_at":"2026-06-10T15:36:21Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f6431b23cd2dd38052c4004313f88b7673f2548b9b2f5ec896255d8cb85342f7","version":4}]}