Perform source-only security audits of codebases, APIs, services, and applications. Use for security questions, focused vulnerability reviews, or explicitly requested full audits.
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
# Audit security boundaries in source
Find vulnerabilities with a concrete trust-boundary failure and give owners evidence and a narrow fix. Delegate every audit to a subagent; the parent verifies findings and owns the report. This skill does not establish runtime behavior or authorize fixes, external probes, publication, or deployment.
## 1. Set the boundary
Read the request, instructions, repository state, architecture, and relevant controls. Identify the reviewed revision, paths, assets, lower-trust principals, and intended security boundaries. Include local changes only when requested. Keep a named concern focused; expand to a codebase-wide audit only when explicitly requested or report artifacts are required. Do not assume controls in unseen deployment infrastructure.
**Done:** scope and evidence limits are explicit; ask before a consequential expansion.
## 2. Delegate and investigate
…
The line at the top of this page pins the label git:20260923.99cdadc, 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.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (3822 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
GitHub
firzus/agent-skills · 4 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yuwpwxc5ncnfpm73
GET https://markdownregistry.com/api/v1/resolve?ref=firzus/agent-skills/security-review
GET https://markdownregistry.com/api/v1/blob/714e6a351fdd2018bb24a3e856f400b7cee6a6c0f678e1df09f7519e76a7a670
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