counterexample-hunter

Installation
SKILL.md

Counterexample Hunter

Try to break the claim before trusting it.

The two failure modes to avoid:

  • Fake counterexample: something that looks like it breaks the claim but actually doesn't violate any assumption. Always check the assumptions explicitly.
  • Empty survival: concluding "no counterexample found" without saying what was actually tested. A claim that survived three degenerate cases is not a claim that has been stress-tested.

Step 1: Restate the claim precisely

Write out:

  • The exact statement (universal quantifiers, domains, topology, finiteness — don't paraphrase)
  • Every assumption, explicit and implicit
  • What "breaks" the claim means (counterexample to existence? to uniqueness? to a bound?)

If the claim is ambiguous, name the ambiguity and ask which reading to test.

Installs
7
GitHub Stars
2
First Seen
Jun 15, 2026
counterexample-hunter — jurgendn/agent-skills