DeepSeek Harness Plugin: dsh-project-prompt

`dsh-project-prompt` is a DeepSeek Harness plugin used to manage private, project-specific prompt rules. It supports rules through Git remote URLs, local repository paths, or directory prefix matching, and injects them into sessions. The plugin is Worktree-aware, covers subagents, and supports two injection modes: `section` (with variable interpolation) and `inject` (with literals). The configuration file is located at `$DSH_HOME/cordis.patch.yml`. Configuration errors are reported during loading, ensuring that rules remain secure and are not committed to the code repository.