{"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-theoldmillhouse-0i7n4q11","versions":[{"created_at":"2026-07-02T01:11:37Z","element_count":90,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"eb17219a43da40a76f8e028ec78393f3a2ff25c5984e742aa6a11b2af367655d","version":3},{"created_at":"2026-07-02T01:09:56Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6941f9d2b1541059a7c9a8a85a636f402eb58805373ea1dbbb0aeec5a3b82699","version":2},{"created_at":"2026-07-02T01:09:56Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}