{"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-l4yfoov9","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21093533 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1da3d2ddf5f7f13a2468ab355be8fc790df7873fe3ba35b1d2a61512fd0fded7","version":19},{"created_at":"2026-06-10T13:05:38Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2a73322c19dfd060a356f95af919d1ed41401645a981fe09f158e2d90f2de6b0","version":4}]}