{"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-d9buxr5b","versions":[{"created_at":"2026-06-10T23:23:56Z","element_count":69,"note":"5軸GA polish 54->95 by M5 (autonomous)","saved_by":"mcp","sha256":"420d1dc2bc2fcb11c819814a72ebfc4fb35709d4e421a49864160da61a85a891","version":10},{"created_at":"2026-06-10T23:07:52Z","element_count":47,"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":"126eb4acaae23c258bb574518ab0a50d2385076c0fb79149ce673f32238485b8","version":7}]}