Live platform.pressure readout + in-page load
generator. When pressure crosses the admission threshold, ctx.shed('background') returns true and the
entry below shows the real reason. Use "Simulate shed" to
demo the surface without driving real load.
Each button publishes N no-op events on demos:pressure:noise. Small bursts (≤200)
fire in one wire-batched call; larger bursts spread over
~1.5s so the adapter's 1Hz pressure sampler observes a
sustained rate across multiple windows. After the burst,
the handler checks ctx.shed('background');
if it fires, a real shed event lands in the log below.
The publishRatePerSec threshold is set to
500/sec in svelte.config.js so +1000 / +5000
reliably trip shedding.