{"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-fdn6mieh","versions":[{"created_at":"2026-06-10T22:53:09Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy50261601→quote20764725 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"946a4119418678106f3148899b5447b6ea461c5b15c9b32197a3c5e14db11ecf","version":10},{"created_at":"2026-06-10T16:39:33Z","element_count":89,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"44f171641afa4db15ebb47785dcb8b99dfa265c3a206321f76e8eeb42372a596","version":2}]}