{"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-willowcreekhouse-91leqlx9","versions":[{"created_at":"2026-06-13T19:04:07Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4b0c264d6b79727e3852fef342acf47f477d306821516269591d0ea8253f7aa3","version":3},{"created_at":"2026-06-13T18:49:23Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"18116a3018d80ddb44c6a4aea6bd40e03cfd3c726b9afb57e58c53acf2a2634d","version":2},{"created_at":"2026-06-13T18:49:22Z","element_count":107,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}