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codeguard-1-digital-certificates Cursor ruleA

codeguard-1-digital-certificates from cisco-ai-defense/skill-scanner is a Cursor rule: instructions the Cursor agent follows in that repo.

Install it, pinned
mdr add cisco-ai-defense/skill-scanner/.cursor/rules/codeguard-1-digital-certificates.mdc@v1.0.1

Pins v1.0.1 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 14 of 14 checks passed
Kind
Cursor rule
Repository
cisco-ai-defense/skill-scanner
Path
.cursor/rules/codeguard-1-digital-certificates.mdc
Versions recorded
1
Latest version
v1.0.1, committed Jan 29, 2026
Size
4,944 bytes
Repository stars
2,616
License
a license file GitHub does not identify

Certificate Best Practices.

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

rule_id: codeguard-1-digital-certificates

When you encounter data that appears to be an X.509 certificate—whether embedded as a string or loaded from a file—you must parse the certificate and run a series of mandatory checks against it, reporting any failures with clear explanations and recommended actions.

### 1. How to Identify Certificate Data

Actively scan for certificate data using the following heuristics:

- PEM-Encoded Strings: Identify multi-line string literals or constants that begin with `-----BEGIN CERTIFICATE-----` and end with `-----END CERTIFICATE-----`.

- File Operations: Pay close attention to file read operations on files with common certificate extensions, such as `.pem`, `.crt`, `.cer`, and `.der`.

- Library Function Calls: Recognize the usage of functions from cryptographic libraries used to load or parse certificates (e.g., OpenSSL's `PEM_read_X509`, Python's `cryptography.x509.load_pem_x509_certificate`, Java's `CertificateFactory`).

### 2. Mandatory Sanity Checks

Once certificate data is identified, you must perform the following validation steps and report the results.

#### Check 1: Expiration Status
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add cisco-ai-defense/skill-scanner/.cursor/rules/codeguard-1-digital-certificates.mdc@sha256:484bb12ebc0935ea

The line at the top of this page pins the label v1.0.1, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_wvagklx3cdu6rh3m.svg)](https://markdownregistry.com/a/art_wvagklx3cdu6rh3m)

6 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Jan 29, 2026.

versioncommittedcommitsizeaudit
v1.0.1 latest2026-01-29 ceb5ad1 4,944 BA view

Audit of the latest version

A  14 of 14 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Size between 200 bytes and 200 KB (4944 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

cisco-ai-defense/skill-scanner · 2,616 stars · license a license file GitHub does not identify · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_wvagklx3cdu6rh3m
GET https://markdownregistry.com/api/v1/resolve?ref=cisco-ai-defense/skill-scanner/.cursor/rules/codeguard-1-digital-certificates.mdc
GET https://markdownregistry.com/api/v1/blob/484bb12ebc0935ead93dc3fb8d1850d813f4607efcd9f29e50ecf95c794d84ce

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: Cursor rules vs AGENTS.md · which agent file does what.

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Every file in cisco-ai-defense/skill-scanner

Other files named codeguard-1-digital-certificates

codeguard-1-digital-certificates Cursor rule
santosomar/ai-agents-for-cybersecurity · .cursor/rules/codeguard-1-digital-certificates.mdc · Certificate Best Practices
v1.5.0 · audit A · 251 stars

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