{"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-yxsc8y9b","versions":[{"created_at":"2026-06-10T22:56:37Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote24212747 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"fa25ce0646dfac744055026cf38100d451dbc126bf7d83c865fbcb31843aa6fa","version":10},{"created_at":"2026-06-10T18:46:37Z","element_count":84,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"3cf6d6c2c38578a1b0679998a78620cffef598414af4c34cb818d613414c6995","version":3}]}