{"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-dpdziz1r","versions":[{"created_at":"2026-06-10T22:52:48Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / 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":"41e1190eab634bdacb38f93e6d98ce62d02a52ed37c71c80e8d5325d9cf787c6","version":10},{"created_at":"2026-06-10T16:23:09Z","element_count":74,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ef3568777b3000be7a18d105c5c905c3fb1b1b001bbbe2388b2c652a09ac4d05","version":2}]}