Borrowing it
Nothing to install: this file belongs to luanmorenommaciel/agentspec. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/luanmorenommaciel/agentspec/main/.claude/skills/create-agent/SKILL.mdgit clone --depth 1 https://github.com/luanmorenommaciel/agentspecWrote 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/luanmorenommaciel/agentspec/create-agent)<a href="https://agentmods.dev/skills/luanmorenommaciel/agentspec/create-agent"><img src="https://agentmods.dev/badge/skills/luanmorenommaciel/agentspec/create-agent/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/luanmorenommaciel/agentspec/create-agent"><img src="https://agentmods.dev/badge/skills/luanmorenommaciel/agentspec/create-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 133 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 5.1 | $0.00154 | $0.02415 |
| Opus 5.5 | $0.00062 | $0.00966 |
| Sonnet 5.5 | $0.00031 | $0.00483 |
| Haiku 4.5 | $0.00015 | $0.00242 |
Grade A, and why
create-agent 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create an Agent (repo conventions)
Agents are the EXECUTION layer of the component model: identity, tool scope, model tier, stop conditions, escalation — a thin shell around capabilities. The scaffold and tier rules are owned by .claude/agents/_template.md; the layer decision is owned by the component model. This skill carries the repo mechanics between those two: the frontmatter contract as the router reads it, the thin-executor default, and the checklist an agent passes before it ships.
Division of labor
| Concern | Owner |
|---|---|
| Is an agent even the right layer? | the component-model skill (gate), grounded in .claude/kb/shared/component-model.md |
| Section structure, tier line budgets, section-by-tier requirements | .claude/agents/_template.md (copy it) + .claude/agents/README.md |
| The methodology the agent executes | a skill, authored via create-skill |
| Frontmatter contract, router coupling, ship checklist | this skill |
When to use / Skip if
First, run the layer gate. Before writing anything, apply the component-model skill (or read .claude/kb/shared/component-model.md). Most "new agent" asks are actually new skills plus a thin executor: if the request is "teach the system HOW to do X", that is a skill — the agent, if one is needed at all, is only the WHO (identity, tools, boundaries).
Use this skill when:
- Adding a new specialist agent under
.claude/agents/. - Splitting an overloaded agent into two roles with distinct tool scopes or KB domains.
Skip if:
- The capability is methodology or how-to knowledge →
create-skill. - The content is reference truth (facts, standards, deep dives) →
/create-kb. - An existing agent already covers most of the capability → extend it instead; apply the four-condition gate in
.claude/agents/README.md("When NOT to Create an Agent" — no existing agent covers >60%, unique KB/tool combination, ≥3 distinct triggers, no >80% overlap). - Undecided which layer the logic belongs in → the
component-modelskill first.
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.
- 1mo ago First seen · 135 lines · 154 tokens per session scan A 6aaddc24f967
create-agent is a skill published in the GitHub repository luanmorenommaciel/agentspec (256 stars, last pushed 3d ago), licensed MIT. It adds 154 tokens to every session and 2,415 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-09-01.
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