{"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-2fptm8aw","versions":[{"created_at":"2026-06-11T00:31:36Z","element_count":90,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a0deab42ea20e794a1d9760618c30e33d9fe3decd46ba9ef59ce29398133d029","version":15},{"created_at":"2026-06-10T23:10:20Z","element_count":54,"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":"2d0af74d10c6e1c3684cc20c4c6c19bbd08b6dc4a76926dcd0ecfc47a19f6c5a","version":7}]}