{"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-maplewoodbungalow-ax6c5our","versions":[{"created_at":"2026-07-23T07:16:43Z","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":"0867624cebcbe50505aa17a1cfb922cf9cfc0758bc58a2870b0a7a9eb2e0e9be","version":2},{"created_at":"2026-07-23T07:16:43Z","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}]}