{"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-94na23tl","versions":[{"created_at":"2026-06-11T00:31:35Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"139e077618dde8450ecfd55bb1605fccad812db8fecc5e673dcb1cb56334dbba","version":15},{"created_at":"2026-06-10T23:10:13Z","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":"6b04bd5694e0dd35438b22540fd5365ad1ad62bc0b964a7cca9a022a313a5903","version":7}]}