llm-agent-security SKILL.md skillA
llm-agent-security from leahycc/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add leahycc/claude-skills/llm-agent-security@git:20261024.77a47acPins git:20261024.77a47ac in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- leahycc/claude-skills
- Path
skills/llm-agent-security/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261024.77a47ac, committed Oct 24, 2026
- Size
- 13,136 bytes
- Repository stars
- 3
- License
- MIT
Defensive review when a model can see untrusted content or act with real credentials. Covers prompt injection as an architecture problem, tool agency, memory and compaction, MCP and inter-agent traffic, AI supply chain, output handling, and human approval. Maps the OWASP LLM Top 10 (2026) and the OWASP Agentic Top 10 (2026). Use when adding or changing chat, RAG, email, tickets, uploads, web fetch, tool calls, memory, MCP, skills, hooks, instruction files, or an AI SDK install. Not for…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# LLM and Agent Security — Trust Boundary for Models That Can Act Use this skill when a change lets a model see untrusted content, or lets an agent component act with real credentials. Source checks and dates: [SOURCES.md](SOURCES.md). Incident facts and links: [Incident Appendix](resources/incident-appendix.md). ## Contents - [Two places this skill applies](#two-places-this-skill-applies) - [Architecture](#architecture) - [Quick Reference](#quick-reference) - [The #1 Mistake: The Model Authorizes Itself](#the-1-mistake-the-model-authorizes-itself) - [Decision Matrix: "Where Does the Control Live?"](#decision-matrix-where-does-the-control-live) - [Decision Matrix: "Is This Secure?"](#decision-matrix-is-this-secure) - [OWASP LLM Top 10 (2026)](#owasp-llm-top-10-2026) - [OWASP Agentic Top 10 (2026)](#owasp-agentic-top-10-2026) - [Review Checklist](#review-checklist) - [What This Skill Does Not Contain](#what-this-skill-does-not-contain) …
Read the whole file at its exact version.
How to install
mdr add leahycc/claude-skills/llm-agent-security@sha256:5b78a5f3f8ab1a42The line at the top of this page pins the label git:20261024.77a47ac, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_6ryest2na7qjs2pj)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 24, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13136 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
leahycc/claude-skills · 3 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6ryest2na7qjs2pj GET https://markdownregistry.com/api/v1/resolve?ref=leahycc/claude-skills/llm-agent-security GET https://markdownregistry.com/api/v1/blob/5b78a5f3f8ab1a42e5c8b8baeaa716f5c049d2a76f2888475e79bc7b8ee6439a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.