{"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-house-3g1xk6jc","versions":[{"created_at":"2026-06-19T06:02:33Z","element_count":87,"note":"revert: GA design failed production houki (M5)","saved_by":"mcp","sha256":"498425f22933f5689ba05643a5f7ea12319b6da2d9a359d479e25923ab42a52e","version":4},{"created_at":"2026-06-19T06:02:30Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"e262c70c2ee2e3c3d93b900a93621296d76793e9d70980ccd4ff6a14098e6860","version":3},{"created_at":"2026-06-19T05:51:51Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"facb1b8077892f24bebf6314f6b75799e85ffb73b7518e12416938c71b7e8b75","version":2},{"created_at":"2026-06-19T05:51:49Z","element_count":87,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}