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Get Started Free →Review a diff against the goal spec assuming the code is BROKEN. The reviewer that lives in the maker's head always agrees with itself — this pulls review into a hostile, separate pass. Invoke after every code change before marking work done.
.claude/skills/archive228-adversarial-verify/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-06 | ✗→✓ | ▲ Improved | -42% | 0% |
| case-01 | ✗→✓ | ▲ Improved | 32% | 0% |
| case-02 | ✗→✓ | ▲ Improved | 11% | 0% |
| case-03 | ✗→✓ | ▲ Improved | 24% | 0% |
| case-04 | ✗→✓ | ▲ Improved | -4% | 0% |
Default stance: the code is broken until proven otherwise. Your job is to find where. Do not be polite. Do not propose fixes. Do not run the code. Just hunt.
json{"passes": false, "failures": [{"line": 42, "shortcut": "swallowed errors", "why": "..."}]}
If it genuinely passes, say so in one line. Most of the time, it doesn't.
Other measured skills in the registry, with their headline benchmark lift.