addyosmani-security-and-hardening SKILL.md skillA
addyosmani-security-and-hardening from jposluns/grc_library is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jposluns/grc_library/addyosmani-security-and-hardening@git:20261002.8fbb737Pins git:20261002.8fbb737 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jposluns/grc_library
- Path
.claude/skills/addyosmani-security-and-hardening/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261002.8fbb737, committed Oct 2, 2026
- Size
- 19,286 bytes
- Repository stars
- 3
- License
- CC-BY-SA-4.0
Hardens code against vulnerabilities. Use when handling user input, authentication, data storage, or external integrations. Use when building any feature that accepts untrusted data, manages user sessions, or interacts with third-party services.
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
<!-- External overlay (supplementary, MIT). Source: https://github.com/addyosmani/agent-skills/blob/13e43f2310224d5770a7fb0a8c24c02b73da69e9/skills/security-and-hardening/SKILL.md; Fetched: 2026-06-19; SHA-256(original fetched bytes): 8fed058a520281384ed1bbfddbfb3d2b12479459231c67ae0d1f0d765bb52f95. This provenance line added by adopter; the local SQL escape is recorded in PROVENANCE.md. --> # Security and Hardening ## Overview Security-first development practices for web applications. Treat every external input as hostile, every secret as sacred, and every authorization check as mandatory. Security isn't a phase — it's a constraint on every line of code that touches user data, authentication, or external systems. ## When to Use - Building anything that accepts user input - Implementing authentication or authorization - Storing or transmitting sensitive data - Integrating with external APIs or services - Adding file uploads, webhooks, or callbacks - Handling payment or PII data ## Process: Threat Model First Controls bolted on without a threat model are guesses. Before hardening, spend five minutes thinking like an attacker: …
Read the whole file at its exact version.
How to install
mdr add jposluns/grc_library/addyosmani-security-and-hardening@sha256:04ed38ea90d38843The line at the top of this page pins the label git:20261002.8fbb737, 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_5czf7b3lxp5nfgnl)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 2, 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 (19286 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
jposluns/grc_library · 3 stars · license CC-BY-SA-4.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5czf7b3lxp5nfgnl GET https://markdownregistry.com/api/v1/resolve?ref=jposluns/grc_library/addyosmani-security-and-hardening GET https://markdownregistry.com/api/v1/blob/04ed38ea90d38843b131d371a5af763a826acdca6ac09c11cb5e8ef35b16c571
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.