{"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-22rtnieq","versions":[{"created_at":"2026-06-10T22:54:29Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote19615588 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"09fd15e267a164ba581a02070e2f6bda00b4539575cfac18577eeb29bb1fdab5","version":10},{"created_at":"2026-06-10T17:39:42Z","element_count":81,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"33937c5acc3d936f0be8fc6f488371ba24601a64e279026255419c30a7d843a3","version":3}]}