System & Session Monitor

Five pills in the DeepSeek Harness composer dock. Context, tokens, and live system readings share one row. Click any pill to open its card.

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The five pills

Pill	Live reading	Card
Context	5x3 micro grid and usage percentage	20x5 brick matrix, system prompt / tool defs / messages split, cache hit rate
Tokens	Net upload and download per turn	Direction arrows, up/down ratio, up to 16 step bars, cache hit rate
CPU	User plus system load, with a 36 s bar chart	60 s bar chart with peak line, user and system detail, top 5 processes
GPU	Device utilization, with a 36 s bar chart	60 s bar chart with peak line, renderer and tiler detail, top 5 processes
MEM	Used and total, with a 36 s bar chart	60 s bar chart with peak line, wired / compressed / floor rows, top 5 processes

Drag any pill to reorder. The order persists in localStorage.

Cards

One card opens at a time. Click anywhere outside to dismiss.

Install

dsh plugin --profile web add github:Shiro-umi/dsh-system-monitor

Or install the release tarball:

dsh plugin --profile web add https://github.com/Shiro-umi/dsh-system-monitor/releases/latest/download/dsh-system-monitor.tgz

Link a local checkout while developing:

dsh plugin --profile web add link:/path/to/dsh-system-monitor

Restart DeepSeek Harness afterward.

Requires macOS and clang (Xcode Command Line Tools). On first start the plugin compiles sampler.c into bin/sampler. When the install directory is read-only it builds into the system temp directory instead.

Sampling

Item	Value
Rate	One frame every 200 ms
CPU	Per-core tick deltas, split into user and system
GPU	IOAccelerator PerformanceStatistics
Memory	vm_statistics64, same basis as top PhysMem
Transport	NDJSON stream from the host
Idle stop	Sampler exits 5 s after the last subscriber leaves
Orphan guard	Sampler exits when the parent process is gone

Fallbacks

Condition	Behavior
clang missing	Frames built from top, ioreg, and sysctl once per second, LOW tag on the pill
Not macOS	Native sampler off, falls back to CPU and memory from node:os
Process query fails	Card shows a placeholder, metrics keep updating

Slots

The plugin takes three entries in the composer dock. It replaces the built-in usage and activity indicators with its own five pills.

Develop

npm run check
npm test

npm test verifies the manifest, export map, client static invariants, card width math, and icon geometry.

License

MIT