dreadnode/capabilities · capabilities/web-security/skills/content-type-mime-diff/SKILL.md

content-type-mime-diff skillA

content-type-mime-diff is agent-read markdown (skill) from dreadnode/capabilities: MIME Content-Type parser differentials between browsers and server-side libraries for XSS. Browsers treat Content-Type as list-based (last value wins), while server-side parsers treat it as singleton (first value wins). Use when application validates Content-Type server-side but reflects it verbatim in response headers..

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 dreadnode/capabilities/content-type-mime-diff@git:20260504.2a64374
Exact content
mdr add dreadnode/capabilities/content-type-mime-diff@sha256:7799a52a5bf57157

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_yr37jcvewdupchmk.svg)](https://markdownregistry.com/a/art_yr37jcvewdupchmk)

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Versions

versioncommittedcommitsizeaudit
git:20260504.2a64374 latest2026-05-04 2a64374 3,668 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 (3668 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

dreadnode/capabilities · 15 stars · license none · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_yr37jcvewdupchmk
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/content-type-mime-diff
GET https://markdownregistry.com/api/v1/blob/7799a52a5bf57157cfd044f7320543306d9bf7fb0e1866623fc1ee291babac56

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.