addyosmani/agent-skills · skills/security-and-hardening/SKILL.md

security-and-hardening skillA

security-and-hardening is agent-read markdown (skill) from addyosmani/agent-skills: Hardens code against vulnerabilities. Use when auditing an input handler for vulnerabilities, when handling user input, authentication, data storage, or external integrations, or when checking a login flow is safe against the OWASP Top Ten. Use when building any feature that accepts untrusted data, manages user sessions, or interacts with third-party services. Use when auditing dependencies for known vulnerabilities, triaging package-manager audit findings, or assessing supply-chain risk in a ne.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add addyosmani/agent-skills/security-and-hardening@git:20260907.cda4542
Exact content
mdr add addyosmani/agent-skills/security-and-hardening@sha256:4aa7a433a0a8042f

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_a45vwqebrwoyfbtv.svg)](https://markdownregistry.com/a/art_a45vwqebrwoyfbtv)

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Versions

versioncommittedcommitsizeaudit
git:20260907.cda4542 latest2026-09-07 cda4542 27,993 BA view · diff
git:20260904.45fd4a02026-09-04 45fd4a0 27,876 BA view · diff
git:20260903.020ec102026-09-03 020ec10 25,429 BA view · diff
git:20260831.1483fc12026-08-31 1483fc1 24,340 BA view · diff
git:20260831.14583052026-08-31 1458305 25,281 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, 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 (27993 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

addyosmani/agent-skills · 93,583 stars · license MIT · pushed 2026-09-12 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_a45vwqebrwoyfbtv
GET https://markdownregistry.com/api/v1/resolve?ref=addyosmani/agent-skills/security-and-hardening
GET https://markdownregistry.com/api/v1/blob/4aa7a433a0a8042f47197f05893343bd9d1cc02a9179537ef3437c05c49b385d