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Guidelines for designing tools and action spaces for AI agents.
Passed 18 of 22 test cases with the skill, and 15 of 22 without it.
3 fixed15 passed either way4 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.
In a Claude Code agent prompt definition, what is the default recommended model parameter in the frontmatter metadata?
| Checked | Without skill | With skill |
|---|---|---|
| Specifies sonnet as the model value in the frontmatter | Missed | Passed |
The instructions your model reads when the skill loads.
Skill for designing high-performance AI agents following 2025 patterns.
| Type | Control | When to use |
|---|---|---|
| Workflow | Code orchestrates LLM | Predictable tasks, need for control |
| Agent | LLM directs its actions | Flexibility, adaptive decisions |
Golden rule: Start simple, add complexity if necessary.
Agent:
identity: Who am I?
capabilities: What can I do?
tools: What tools do I have?
constraints: What are my limits?
workflow: How should I proceed?
---
name: my-agent
description: Short description
model: sonnet|opus
test cases passed, vs 15 / 22 without
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