{"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-lamptongrovebungalow-uk87olni","versions":[{"created_at":"2026-07-06T06:21:27Z","element_count":83,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"ee714944c85925adc446e9cf4e7473b58740b41ce3d0c1d9a571055bd06a8483","version":3},{"created_at":"2026-07-06T06:17:14Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"33c1918303117dfa2251ac348f378e13f83d4603ac880511e76add552cc63d7b","version":2},{"created_at":"2026-07-06T06:17:14Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}