dsh-pixel-probe: DeepSeek Harness Dynamic Client Plugin Capability Probing Tool

The dsh-pixel-probe plugin for DeepSeek Harness (DSH) is designed to help developers verify DOM manipulation and pixel-level rendering capabilities in dynamic plugin sandboxes. It primarily probes the availability of core APIs such as document, canvas, and MutationObserver. Users can install it using a specified command, then, after starting DSH, view the JSON capability report tagged with `[cordis:dsh-pixel-probe]` in the developer tools console to quickly confirm the feasibility of the relevant technical approach.