live the engine, in your hands
Poke the engine.
It will answer for itself.
One character. A handful of state variables — integrators that accumulate and decay — running live in your browser, right now. You are "you" in their bar. Nothing below is scripted: every visible action is a threshold crossing, and every crossing prints its own arithmetic.
This is a small demo slice built for this page — 3 fast states, 1 relationship, 5 actions, demo-paced constants — not the full engine. What it faithfully shares: the update-rule shape, threshold-crossing selection, the provocation/kindness appraisal idioms, and the determinism.
Persona — same dials, different settings
Do something — events from you
The world
Run
Guided scenarios — scripted inputs, live dynamics
Fast states — reset by sleep
Slow state — the relationship with you, survives sleep
History
Causal trace — why each action fired
Border-case verification — run pending…
These run headlessly on page load, over the same pure step function the page animates. If any fails, the playground refuses to pretend: the controls disable themselves.
Scope, stated plainly: this playground embeds a deliberately small slice of the engine — 3 fast states, 1 relationship, 5 actions, demo-paced constants — so you can see every cause. The full engine adds more states, per-person relationships across a whole cast, drives and seeking, sleep/night dynamics, input filters, and a multi-agent router; its constants come from calibration, not hand-tuning. What IS the same here: the update-rule shape, the threshold-crossing selection, and the determinism — the same clicks at the same ticks always produce the same life.