{"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-6v40tjhd","versions":[{"created_at":"2026-06-10T22:52:51Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy41884668→quote23910325 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"bb0b40191ac00b223b20c175ba58e2b4c434d68881bbb7334e5c55a2226dd0e2","version":10},{"created_at":"2026-06-10T16:39:24Z","element_count":89,"note":"5軸GA polish 52->94 by M5 (autonomous)","saved_by":"mcp","sha256":"94c550b752d4d3e2ec0f8573a45142034f56e1e069789389d67e892e4dea73fe","version":2}]}