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itsofficialadiitsofficialadi/boundiff/.agents/skills/test-gap-audit/SKILL.md

test-gap-audit

Skill0 starsChanged 24 days agoMITView on GitHub

Review existing test coverage for important behavior, missing assertions, and false confidence without changing code. Use to assess a test suite; not to implement new tests.

2 other projects use a version of this.

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The file

We split this skill into the rules it gives an agent

2 rules. About 0 are common, 2 are distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈2

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Look for gaps: a successful path without failure checks, missing negative cases, brittle snapshots, shared test pollution, unverifiable …

    line 13
  2. Distinctive:

    If running tests might write snapshots, fixtures, caches, or project files, use a disposable copy.

    line 14

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Test-gap audit

Coverage percentages are a map, not the destination. This is a read-only audit.

  1. Identify the behavior and regression surface. Read tests alongside the production paths they claim to exercise.
  2. Trace meaningful boundaries: validation, authorization, failure handling, persistence, concurrency, and public contracts where relevant.
  3. Inspect assertions, test doubles, fixtures, and setup. Ask whether the test fails for the relevant defect or merely proves the mock was configured.
  4. Look for gaps: a successful path without failure checks, missing negative cases, brittle snapshots, shared test pollution, unverifiable external assumptions, and tests that cannot detect regressions.
  5. If running tests might write snapshots, fixtures, caches, or project files, use a disposable copy. Do not run auto-fix or coverage instrumentation that mutates the reviewed target.
  6. Rank a short list by impact × likelihood × detectability. Suggest the narrowest high-value addition without implementing it.

Output

GapWhy existing tests miss itSuggested assertion or scenarioPriority

Include target/version, checks actually run, and limitations. Do not infer all behaviors are covered because a test run is green.

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