What is the most common failure mode when testing a skill?

The most common failure mode is that a skill doesn't activate when it should, or conversely, activates when it shouldn't. This indicates issues with the trigger reliability.

How many prompts should trigger the skill in the first test stage?

In the first test stage, you should try 5 different prompts that are designed to trigger your skill, and it should activate on at least 4 of them for its description to be considered adequate.

What should be used to test the output quality of a skill?

When testing the output quality of a skill, you should use a real project, not a toy example. The project should have real complexity, patterns, and edge cases to ensure the skill produces useful and accurate output in practical scenarios.

Why is it important to test edge cases for a skill?

It is important to test edge cases for a skill because while it doesn't need to handle every edge case perfectly, it should not crash or produce obviously wrong output when encountering scenarios like empty files, very large files, multiple languages, or unusual project structures.

What should be ensured about the skill's description and metadata before publishing?

Before publishing, you should ensure that the skill's title clearly communicates its function, the description accurately matches its actual behavior, the tags are precise, and the reading time or complexity information is appropriate for the content of the skill.

How to Test a SKILL.md Skill Before Publishing (2026)

How to Test a SKILL.md Skill Before Publishing

Published: May 15, 2026

Category: Tutorials

Publishing a broken or poorly-tested skill damages your reputation as a creator. Bad reviews are permanent. Here's how to test properly before listing.

> Quick Answer: To test an AI skill before publishing, follow these steps: test trigger reliability with diverse prompts, evaluate output quality on real projects, check edge cases, verify cross-agent compatibility, and review the description/metadata to ensure accuracy and clarity.

Step 1: Test trigger reliability

The most common failure mode: the skill doesn't activate when it should, or activates when it shouldn't.

Start a Claude Code session and try 5 different prompts that should trigger your skill. Then try 5 prompts that are similar but shouldn't trigger it.

For a code review skill:

Should trigger:

"Review my latest changes"

"Check this code for bugs"

"Do a code review on the auth module"

"Look for security issues in this PR"

"Review the code I just wrote"

Should NOT trigger:

"Write a new function to parse JSON"

"Help me with my Docker configuration"

"Explain what this regex does"

"Create a README for this project"

"Fix the bug on line 45"

If it triggers on fewer than 4 of the first 5, your description is too narrow. If it triggers on more than 1 of the second 5, your description is too broad.

For help writing better descriptions, see How to Write a SKILL.md Description That Triggers.

Step 2: Test output quality

Once the skill triggers, does it produce useful output? Test on a real project — not a toy example. Use a codebase with real complexity, real patterns, and real edge cases.

Check:

Does the output follow the instructions in the skill?

Is it actually better than Claude Code without the skill?

Does it match the conventions of the target project?

Are there factual errors or hallucinated patterns?

Step 3: Test edge cases

Empty files or projects with no code
Very large files (1000+ lines)
Multiple languages in the same project
Unusual project structures
Projects using uncommon frameworks or tools

Your skill doesn't need to handle every edge case perfectly, but it shouldn't crash or produce obviously wrong output.

Step 4: Test cross-agent compatibility

If you're listing the skill as compatible with multiple agents, test it in each one:

# Test in Claude Code
cp -r ~/.claude/skills/my-skill/ /tmp/skill-test/
ls ~/.claude/skills/my-skill/SKILL.md
Test in Codex CLI
cp -r /tmp/skill-test/ ~/.codex/skills/my-skill/
Test in Gemini CLI
cp -r /tmp/skill-test/ ~/.gemini/skills/my-skill/

Run the same test prompts in each agent. The skill should produce comparable output across all of them.

Step 5: Test the description and metadata

Your marketplace listing is the first thing buyers see. Check:

Does the title clearly communicate what the skill does?

Does the description match the actual behavior?

Are the tags accurate?

Is the reading time/complexity appropriate for the skill's content?

Pre-publish checklist

[ ] Skill triggers on relevant prompts (5/5)
[ ] Skill does NOT trigger on unrelated prompts (0/5)
[ ] Output quality is better than Claude without the skill
[ ] Tested on a real project, not a toy example
[ ] Edge cases don't cause crashes or garbage output
[ ] Tested in all listed compatible agents
[ ] SKILL.md frontmatter is valid (name, description)
[ ] No hardcoded paths, secrets, or personal info
[ ] Description and metadata are accurate

Publish your tested skill on Agensi — 80/20 revenue split, security review included.