dsh-pixel-probe

Building a pixel-based plugin always starts with the same anxiety: can the browser sandbox actually give you canvas? Is MutationObserver blocked? Does the Image constructor even exist? dsh-pixel-probe is a small diagnostic utility designed to remove that guesswork. In a single run it checks the availability of document, canvas, MutationObserver, and Image, counts the SVG icons on the current page, and prints a compact one-line JSON report to the browser console—so you can confirm in seconds whether a runtime rasterization-to-pixel pipeline is feasible in your specific environment.

The plugin is intentionally lightweight. It is a pure client plugin with an empty apply on the host side, meaning it pulls in no extra dependencies and introduces no side effects. After installation it is automatically appended to the profile bundles and activates alongside your web workflow, with console output tagged [cordis:dsh-pixel-probe] for easy identification in mixed logs. For a one-off feasibility check you can also paste the source directly into a single-process codis_run without touching your profile configuration at all.

It is aimed at developers working on pixel rendering, icon rasterization, or DOM-animation plugins within the DeepSeek Harness ecosystem. Run the probe once before you start writing business logic, map out exactly which sandbox APIs are available to you, and spend your debugging time on the pixel algorithms that actually matter instead of repeatedly hitting restricted-implementation dead ends.