{"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-mrkxndac","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21237329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"ff0f6c60f89a034116c308f1947f35320a90b89c9fc74cf22e0ccfe952ce8fae","version":19},{"created_at":"2026-06-10T13:05:16Z","element_count":91,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"dcf60f39ea0318ae476dd61a0ecaf35343dfb9e23b968635ca5272d478f55532","version":4}]}