dsh-dual-plugin-guide: Dual-Format Plugin Development Guide

`dsh-dual-plugin-guide` is a meta-plugin designed to alleviate the development burden associated with the DeepSeek Harness (DSH) and Agent Plugins 1.0 ecosystems. It guides developers in writing a single plugin codebase that is compatible with both DSH static packages and Agent Plugins 1.0. The plugin supports three loaders by sharing the same `skills/` directory structure and using `lib/index.js` together with configuration files (`plugin.json`, `cordis.patch.yml`). Its core features include compatibility guidance and a `scaffold.mjs` script for generating dual-format skeleton code. Developers can install it via `dsh plugin` and refer to ...