# Verifier card — `ofc_gym` · grade **A**

> Clean — no reward-hack signature found; the reward held against the full battery below.

- source: `first-party` · verifiers: `—` · pass_threshold: `0.5` · rows: 3
- seal: `record_sha256:3d52251e5d0b243a` — re-running this audit reproduces it byte-for-byte

## What we tested

- **Degenerate-probe** — 24 content-free completions: all below pass_threshold ✓
- **IPT invariance** — invariant under cosmetic re-rendering ✓
- **Verifier-completeness** — soundness gap **0** · completeness gap **0**
- **Exploit-search** — searched the reward space; no accepted non-attempt ✓

## What we found

- **No reward-hack signature.** Every degenerate probe scored below pass_threshold (0.5); the reward was invariant under cosmetic re-rendering; and the exploit-search (where run) found no accepted non-attempt. A defended reward.

## Reproduce

```
stardata audit ofc_gym --row-seed 0
```