{"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-jbdbd9g6","versions":[{"created_at":"2026-06-10T22:54:40Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy70239456→quote22302745 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"683b5767c421378bf060a9a65e3329282ed47049f16264b2b4762f2088adcf88","version":10},{"created_at":"2026-06-10T17:56:17Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4917222c36d885cbc90da1a4cb924c90b4007ed1ebd06952a60b02c7d9caed77","version":3}]}