{"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-perrynhouse-51c3z245","versions":[{"created_at":"2026-07-20T11:25:41Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"0771452c28e0c4dde9508d8d90e7eb3f67a3e37c65d257ecf4b44a7270a035b4","version":3},{"created_at":"2026-07-20T11:13:13Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"44630284ff18defcc576d7d4b4a30f630e93926df2c6e966c75a1e9c7f9089e9","version":2},{"created_at":"2026-07-20T11:13:13Z","element_count":90,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}