{"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-ivo6qdvw","versions":[{"created_at":"2026-06-10T22:52:47Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy84287347→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":"b53a711ca59f51b522a05f8b2e03940a974d3424318602b37ae76baf1600ec68","version":11},{"created_at":"2026-06-10T16:09:05Z","element_count":90,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"fc92bee8874661e7d8451f7f2056095b413f653c782d2e5f8cf972795d955010","version":3}]}