dsh-danmaku

DeepSeek Harness trajectory output—tool calls, turn switches, assistant replies—defaults to structured logs that are information-dense but feel static. dsh-danmaku turns those events into real-time danmaku (bullet-comment) streams that fly from right to left across the page: user messages appear as yellow person icons, assistant replies as green robot icons with a content summary, tool calls as blue gear icons with name and parameter digest, tool results as green check or red cross for success and failure, and turn boundaries as purple rocket and checkered-flag markers. At a glance you can see exactly what the agent is doing right now.

The danmaku layer registers into the shell.overlay slot covering the full page with pointer-events set to none, so it is completely click-through and never interferes with application interaction. Fourteen tracks use argmin scheduling to always pick the earliest idle lane, guaranteeing uniform speed and zero collisions. A draggable pill-shaped panel floats in the top-right corner: a master toggle with green gradient and glow when active, a speed slider from 60 to 350 px/s, and edge-docking—drag within 48 pixels of the screen edge and release to collapse into a small label; hover or click to expand. All preferences persist in localStorage across page reloads.

Ideal for developers running multi-turn DeepSeek Harness agent loops who want to watch tool-call cadence and turn transitions unfold in real time, and equally useful during demos or walkthroughs where a cinematic, intuitive view of agent pacing makes the system feel alive and gives the audience a sense of real-time observation.