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 skills add maxedapps/agent-skills --skill create-skillgit clone --depth 1 https://github.com/maxedapps/agent-skillsWrote 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/maxedapps/agent-skills/create-skill)<a href="https://agentmods.dev/skills/maxedapps/agent-skills/create-skill"><img src="https://agentmods.dev/badge/skills/maxedapps/agent-skills/create-skill/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/maxedapps/agent-skills/create-skill"><img src="https://agentmods.dev/badge/skills/maxedapps/agent-skills/create-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, 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 MCP Rug Pull · line 101 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- low Excessive Agency · line 58 Skill's behavior or capabilities extend beyond its stated purpose. Scope creep allows an agent to perform actions unrelated to its documented functionality, increasing the attack surface.Fix: Limit the skill's scope to its documented purpose. Remove instructions that enable the agent to perform actions outside its stated functionality.
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 | $0.00048 | $0.00389 |
| Opus 5.5 | $0.00019 | $0.00156 |
| Sonnet 5.5 | $0.00010 | $0.00078 |
| Haiku 4.5 | $0.00005 | $0.00039 |
Grade A, and why
create-skill 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.
What it actually says
Create Skill
A skill nudges a capable agent in the right direction. It is not a procedure manual. Trust the agent's judgment and write down only what it would not do well on its own.
Frontmatter
name: lowercase kebab-case, matches the directory.description: all routing lives here, because the body only loads after activation. Format:[What it does]. Use this skill when [triggers]. Do not use for [near misses].Under 1024 characters.
Body
- One job per skill. Aim for well under 500 words.
- Say what matters and why, in plain sentences or short bullets. Cut anything the agent already does by default.
- Prescribe exact steps only where mistakes are costly: destructive, security-sensitive, or fragile operations.
- Don't add process for its own sake: no checklists, stop conditions, label systems, report files, review loops, or instructions to use subagents.
- Don't handle niche edge cases. Challenge every rule: does it prevent a real, likely mistake? If not, delete it.
- Add
references/,assets/, orscripts/only for genuinely large or reusable material, and say when to use each file. - Refer to other skills by name, never by path into their files.
Finish
- In this repository, run
node scripts/validate-skill-metadata.mjs <skill>andnode scripts/validate-skill-links.mjs <skill>. - Try the skill once on a realistic task and fix what actually went wrong.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 Changed · -75 lines · -30 tokens per session 20c34a40ade5
- 2mo ago First seen · 108 lines · 78 tokens per session scan A a529bbadd671
create-skill is a skill published in the GitHub repository maxedapps/agent-skills (60 stars, last pushed 1mo ago), licensed MIT. It adds 48 tokens to every session and 389 once invoked, about $0.0002 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 2026-08-30.
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