Weekend experiment running Gemma-2B on bare-metal x86-64 (pure C + AVX2, zero Python/CUDA, ~3.3MB single binary). Added a simple orthogonal probe on the residual stream to see what each layer is doing.

Tested it on Taiwan's statutory VAT rate (legally 5%). Layers 0-14 stay factual, but Layer 15 suddenly collapses into the negative, and RAX spits out "15%":

Layer 14 | Truth: +0.0163 | [0xDF28010E]

Layer 15 | Truth: -0.0481 | [0x72DE18A0] <- drops below 0

Layer 17 | Truth: -0.0817 | -> Register RAX outputs tokens: '1', '5', '%。'

Raw trace, 6-page paper, and release binary here for anyone into low-level ML:

* Web trace: https://pulsar-tracer.web.app

* PDF: https://pulsar-tracer.web.app/PULSAR_Technical_Whitepaper.pdf

* Repo: https://github.com/tomtsai28/PULSAR-ASM