secure-code-guardian SKILL.md skillB
secure-code-guardian from jeffallan/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jeffallan/claude-skills/secure-code-guardian@v1.1.0Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jeffallan/claude-skills
- Path
skills/secure-code-guardian/SKILL.md- Versions recorded
- 5
- Latest version
- v1.1.0, committed Oct 3, 2026
- First version recorded
- Mar 6, 2026
- Size
- 7,220 bytes
- Repository stars
- 12,006
- License
- MIT
Use when implementing authentication/authorization, securing user input, or preventing OWASP Top 10 vulnerabilities — including custom security implementations such as hashing passwords with bcrypt/argon2, sanitizing SQL queries with parameterized statements, configuring CORS/CSP headers, validating input with Zod, and setting up JWT tokens. Invoke for authentication, authorization, input validation, encryption, OWASP Top 10 prevention, secure session management, and security hardening. 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
# Secure Code Guardian ## Core Workflow 1. **Threat model** — Identify attack surface and threats 2. **Design** — Plan security controls 3. **Implement** — Write secure code with defense in depth; see code examples below 4. **Validate** — Test security controls with explicit checkpoints (see below) 5. **Document** — Record security decisions ### Validation Checkpoints After each implementation step, verify: - **Authentication**: Test brute-force protection (lockout/rate limit triggers), session fixation resistance, token expiration, and invalid-credential error messages (must not leak user existence). - **Authorization**: Verify horizontal and vertical privilege escalation paths are blocked; test with tokens belonging to different roles/users. - **Input handling**: Confirm SQL injection payloads (`' OR 1=1--`) are rejected; confirm XSS payloads (`<script>alert(1)</script>`) are escaped or rejected. - **Headers/CORS**: Validate with a security scanner (e.g., `curl -I`, Mozilla Observatory) that security headers are present and CORS origin allowlist is correct. ## Reference Guide Load detailed guidance based on context: | Topic | Reference | Load When | …
Read the whole file at its exact version.
How to install
mdr add jeffallan/claude-skills/secure-code-guardian@sha256:47715fd6db1e0507The line at the top of this page pins the label v1.1.0, 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_t6gwq5cat7yamwmv)
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Versions
The registry has recorded 5 versions of this file, between Mar 6, 2026 and Oct 3, 2026, about one every 53 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-10-03 | 958e60f | 7,220 B | B | view · diff |
| v1.1.0 | 2026-10-03 | ec755b7 | 7,138 B | B | view · diff |
| v1.1.0 | 2026-04-29 | efebc44 | 7,044 B | B | view · diff |
| v1.1.0 | 2026-03-06 | c7afefb | 6,946 B | B | view · diff |
| v1.0.0 | 2026-03-06 | cba3273 | 6,946 B | B | view |
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7220 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
jeffallan/claude-skills · 12,006 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_t6gwq5cat7yamwmv GET https://markdownregistry.com/api/v1/resolve?ref=jeffallan/claude-skills/secure-code-guardian GET https://markdownregistry.com/api/v1/blob/47715fd6db1e0507041a6674a3096f1fd65b086e23453cb7d77a202bbe15fb56
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.
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