@danglong0313/dsh-history-sync: Mirror Codex and Claude Code history to DSH in read-only mode

`@danglong0313/dsh-history-sync` is an MIT-licensed DSH community plugin designed to import conversation history from local Codex and Claude Code into DeepSeek Harness via a read-only, one-way mirror. This plugin is strictly defined as a historical mirror tool; it lacks the capability for two-way synchronization, writing back to the source, or restoring the upstream model, tools, and runtime state. Its core features include: defaulting to a conservative strategy with preview mode enabled and no automatic synchronization, scanning only data from the last 30 days; automatically creating or reusing Workspaces based on the original working directory for grouped display; utilizing content fingerprints and append watermarks to handle duplicate synchronization and incremental updates; and filtering out non-conversational content such as system instructions and tool calls. Configuration via the DSH interface is required after installation.