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Guide for creating custom agents for Claude Code.
Passed 21 of 22 test cases with the skill, and 10 of 22 without it.
and 12 more in the full report
11 fixed10 passed either way1 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.
Show the YAML frontmatter section for an agent named test-runner that uses the fast model, has a 5-minute timeout limit, and caps task execution steps at 10 iterations.
| Checked | Without skill | With skill |
|---|---|---|
| Frontmatter sets model to haiku | Missed | Passed |
| Frontmatter sets max_iterations to 10 | Passed | Passed |
| Frontmatter sets timeout to 300 | Missed | Passed |
The instructions your model reads when the skill loads.
Guide for creating custom agents that provide specialized behaviors and tool access for specific tasks.
Activate this skill when:
Agents are specialized Claude instances with:
| Feature | Agents | Skills |
|---|---|---|
| Activation | Explicitly launched via Task tool | Auto-activated based on context |
| Tool Access | Configurable, can be restricted | Inherit from parent context |
| State | Independent, isolated | Share parent context |
| Use Case | Complex multi-step tasks | Knowledge and guidelines |
| Persistence | Single execution | Always available when loaded |
Agents are defined in markdown files located in:
<plugin-root>/agents/.claude/agents/test cases passed, vs 10 / 22 without
Published skills whose descriptions closely match this one, with their headline benchmark lift.
More skills from the same source and nearby in the registry, with their headline benchmark lift.