{"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-5sky33sx","versions":[{"created_at":"2026-06-10T22:52:43Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21378895 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5793086af9580dc61a919be613f26b5472a049c896033270b5ad8fdf69f01c83","version":12},{"created_at":"2026-06-10T15:36:56Z","element_count":72,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"40fcf23793b1d02e62f621f52cf622d8db4f96df01a151b4f249754cfa102268","version":4}]}