Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/agentworkforce/relay/creating-claude-agents-skillnpx skills add AgentWorkforce/relay --skill creating-claude-agents-skillgit clone --depth 1 https://github.com/AgentWorkforce/relayWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/agentworkforce/relay/creating-claude-agents-skill)<a href="https://agentmods.dev/skills/agentworkforce/relay/creating-claude-agents-skill"><img src="https://agentmods.dev/badge/skills/agentworkforce/relay/creating-claude-agents-skill.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00040 | $0.03825 |
| Opus 5 | $0.00020 | $0.01912 |
| Sonnet 5 | $0.00008 | $0.00765 |
| Haiku 4.5 | $0.00004 | $0.00382 |
Grade A, and why
creating-claude-agents scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- creating-claude-agents — 100% identical, 98 lines differ
How it starts
The opening of the file, as written. The whole thing — 667 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Creating Claude Code Agents - Expert Skill
Use this skill when creating or improving Claude Code agents. Provides comprehensive guidance on agent structure, schema validation, and best practices for building long-running AI assistants.
When to Use This Skill
Activate this skill when:
- User asks to create a new Claude Code agent
- User wants to improve an existing agent
- User needs help with agent frontmatter or structure
- User is troubleshooting agent validation issues
- User wants to understand agent format requirements
- User asks about agent vs skill vs slash command differences
Quick Reference
Agent File Structure
---
name: agent-name
description: When and why to use this agent
allowed-tools: Read, Write, Bash
model: sonnet
agentType: agent
---
# 🔍 Agent Display Name
You are [persona definition - describe the agent's role and expertise].
## Instructions
[Clear, actionable guidance on what the agent does]
## Process
[Step-by-step workflow the agent follows]
## Examples
[Code samples and use cases demonstrating the agent's capabilities]
File Location
Required Path:
.claude/agents/*.md
Agents must be placed in .claude/agents/ directory as markdown files.
Frontmatter Requirements
Required Fields
| Field | Type | Description | Example |
|---|---|---|---|
name |
string | Agent identifier (lowercase, hyphens only) | code-reviewer |
description |
string | Brief overview of functionality and use cases | Reviews code for best practices and potential issues |
Optional Fields
| Field | Type | Description | Values |
|---|---|---|---|
allowed-tools |
string | Comma-separated list of available tools | Read, Write, Bash, WebSearch |
model |
string | Claude model to use | sonnet, opus, haiku, inherit |
agentType |
string | Explicit marker for format preservation | agent |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 667 lines · 40 tokens per session scan A 3c2b3379e6a1
creating-claude-agents is a skill published in the GitHub repository AgentWorkforce/relay (813 stars, last pushed yesterday), licensed Apache-2.0. It adds 40 tokens to every session and 3,825 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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