{"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-nbvbch12","versions":[{"created_at":"2026-06-10T22:56:19Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote22495754 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"009603d78897702bd08f3205787afec99d6e4740b9ba7dce643fde97d406cc21","version":10},{"created_at":"2026-06-10T18:46:38Z","element_count":84,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"f45ed3682906c168d8baf74fab665df5fa4200f9222095a18ae59d769e81c04e","version":3}]}