dsh-pianist: A Deterministic Piano Plugin for DeepSeek Harness

dsh-pianist is a music interaction plugin for the DeepSeek Harness Web UI. It renders a piano using Canvas2D and provides a deterministic timeline, authentic sampled sounds (Salamander Grand Piano V3), and multiple skin effects. The plugin supports generating and playing sheet music through natural-language instructions and is compatible with the DSH kernel. This article details its core features, installation commands, typical usage, browser playback limitations, ecosystem background, and caveats, aiming to provide developers with an intuitive, reproducible environment for music testing and entertainment.