temidayoxyz/deep-work: Turn sessions into deliverables

Deep Work is a workflow plugin developed by maintainer temidayoxyz for DeepSeek Harness, designed to solve the issue where agents provide only chat responses without saving deliverable files to disk. It provides Deep Work agent presets, deep-work skills, .deep-work/ workspace task protocols, and a deliverables/ directory. It also includes the `verify_deliverable` tool to check file existence, size, and container signatures. Installation is performed using `plugin_manager install_bundle` to point to the bundle directory, followed by selecting Deep Work in the mode selector and specifying the workspace. It is suitable for tasks such as assignments, research, reporting, and generating Word/Spreadsheets/Slides/PDF documents. The plugin runs with the permissions of the current DSH process; external side effects require user approval. Users should review the source code and license (MIT) before installation.