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.
/plugin marketplace add secondsky/claude-skillsnpx agentmods add plugins/secondsky/claude-skills/api-authenticationgit clone --depth 1 https://github.com/secondsky/claude-skillsGrade A, and why
api-authentication 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 2d 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
{
"name": "api-authentication",
"description": "Secure API authentication with JWT, OAuth 2.0, API keys. Use for authentication systems, third-party integrations, service-to-service communication, or encountering token management, security headers, auth flow errors.",
"version": "3.8.0",
"author": {
"name": "Claude Skills Maintainers",
"email": "[email protected]"
},
"license": "MIT",
"repository": "https://github.com/secondsky/claude-skills",
"keywords": [
"api-authentication",
"api",
"authentication",
"authorization",
"login",
"security",
"session",
"jwt"
]
}
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.
- 2d ago First seen · 22 lines scan A cc38f9ec9529
api-authentication is a plugin published in the GitHub repository secondsky/claude-skills (212 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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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