Individual skill

con-artist

Audit whether tests detect broken behavior by tracing assertions and running narrow controlled mutations in an isolated workspace; use for test-quality reviews, not routine test execution.

skills/con-artist/SKILL.md

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# Con Artist

> Your mock is very impressed with itself.

## Check what the test actually buys

Trace the requested assertions far enough to establish the actual exercised effect
and select a reachable fault. Follow unresolved bindings, mocks and relevant setup;
reading every intermediate wrapper is not itself evidence. Reuse known instructions,
runner and source context. Keep discovery inside the permitted project root; a
broad suite need not become a reading list of unrelated tests.

Use the evidenced runner and configuration; reuse a valid correct-code baseline.
Choose one meaningful fault at the requested boundary, such as acknowledging