Is Skill Tester safe to copy into my own project?

Yes, under the MIT licence. It's an original — Bryan Collins published it under MIT, so attribution-plus-commercial-use is fine.

SituationalMITOriginal

Skill Tester

Dry-runs a skill against a test input to verify trigger detection, output shape, and side-effect safety before shipping.

Entry verified April 20, 2026

The short answer

The QA step for skill authors. Simulates invocation, checks the trigger matches, and verifies the skill doesn't accidentally write files or call APIs it shouldn't.

When to use it

Before adding a new skill to your .claude/ directory. Before sharing a skill publicly.

Setup

1
Save as ~/.claude/skills/skill-tester.md.
2
Needs a test-cases file (JSON or YAML) describing inputs + expected behaviour.
3
Invoke: /skill-tester <skill-name>.

Example

You: /skill-tester pivot-sweep
Claude: 3 test cases. 2 pass ✓. 1 fails: tier-boundary case — treats a prompts/*.js file as Tier B instead of Tier A. Review regex.

Source & attribution

Author: Bryan Collins
Licence: MIT
Type: Original

Original pattern published under MIT — attribution preserved by convention, not licence requirement.

Caveats

Dry-run simulates but doesn't guarantee — ship to a test environment before production.

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