Shadow Garden

Power-User Systems

Telemetry

A metric board that behaves as one instrument instead of eight sparklines. Hovering any tile broadcasts a single timestamp and every other tile resolves its own value at that same instant, so a latency spike and a queue backing up are visibly the same event rather than two coincidences. Threshold breaches are recorded on the sample rather than on a pixel, so the scar travels with its data and is still there forty seconds after the value recovered.

Cook BookLoopIdle animationHover effectTabular numbersReduced motionFrame rate (FPS)

Install

# Telemetry needs no npm packages

Then copy 2 files into your project:

  • components/registry/telemetry/telemetry.tsx
  • hooks/use-animation-loop.ts

Props

PropTypeDefaultDescription
tilesnumber8Metrics on the board. Every tile shares one clock and one cursor, so this is also how many traces a single hover has to answer at once — the coordination is the component, and it only becomes legible above about six.
columns"2" | "3" | "4""4"Grid width. Narrow columns make each trace taller relative to its width and exaggerate every wobble; wide ones flatten them into something you can actually compare across rows.
sampleRatenumber8How often each ring buffer takes a sample, held independent of the frame rate on purpose. The buffer advances on its own accumulator, so a machine dropping to 30fps shows the same history as one at 120 — a chart whose past depends on the viewer's GPU is lying about the data.
historynumber45How much past each trace shows. Ring capacity is this times the sample rate and is allocated once, so raising either reallocates rather than grows and the memory stays bounded.
smoothingnumber0.25Exponential moving average applied on the way into the buffer. It smooths the stored series rather than the drawing, so the cursor reads exactly the numbers you can see — a readout that disagrees with its own trace is worse than a noisy one.
thresholdnumber0.82Normalised level a metric has to cross to count as a breach. Normalised because the tiles do not share units — a percentage and a megabyte have to be comparable for one cursor and one rule to mean anything across the board.
scarsbooleantrueKeep a permanent mark on the trace where a breach happened. A flash you missed is a flash that did not happen; the scar is what makes an unattended board worth glancing at.
cursorbooleantrueThe shared time cursor. Turning it off leaves eight ordinary sparklines, which is the clearest way to see what it was doing.
fill"none" | "gradient" | "solid""gradient"Area under the trace. Gradient reads as volume without competing with the line; solid is denser and better at small tile sizes; none is the honest choice when several traces would otherwise imply a stack that does not exist.
traceColorstring (hex)"#a855f7"The line, the fill ramp, and the cursor rule.
breachColorstring (hex)"#f87171"The threshold rule, the scar, and the readout while the cursor sits on a breached sample. One colour across all three, so a scar is visibly the same event as the reading that produced it.

What It Demonstrates

Loop
An animation that repeats, a set number of times or infinitely.
Idle animation
Subtle motion that plays while an element is just sitting there, waiting to be interacted with.
Hover effect
Visual change when the cursor moves over an element.
Tabular numbers
Fixed-width digits so numbers don't shift around as they change. Essential for tickers, timers, and counters.
Reduced motion
Respecting the user's prefers-reduced-motion setting by toning down or removing motion.
Frame rate (FPS)
Frames drawn per second. 60fps is the baseline for smooth motion; 120fps on newer displays.

Related Components

Appears In