dsh-vault: A Data Backup and Recovery Plugin for DeepSeek Harness

dsh-vault is a community backup plugin for DeepSeek Harness (DSH) that backs up critical data—including chat history, workspace data, settings, and credentials—to a separate directory outside `~/.dsh`. The plugin provides three core capabilities: one-click backup, detection at startup of data that appears to have been wiped with an accompanying alert, and data restoration supporting either full recovery or scoped recovery (chat history only, workspace settings only). The default backup contents include sessions, storage, configuration files, credentials, and the anonymous user ID, as well as the usage plugin's data if it is installed. Users can check status, back up immediately, list backups, restore, and delete via the Backup Manager on the web settings page or the `backup_vault` tool, and can also generate an offline recovery script. Installation requires the new package name `@feiyang