{"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-j7zjzrjt","versions":[{"created_at":"2026-06-10T22:58:05Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy65310624→quote21192161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"da85f3deea1306e0fc774dba2970ed0f7bd4eea0ca91e373ef6e64fb2e376b4a","version":9},{"created_at":"2026-06-10T19:50:30Z","element_count":69,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"4be9135e7a623d1bcee8b46512e46aca8f21ac36098f239e36146b805233f54e","version":2}]}