dreadnode/capabilities · capabilities/web-security/skills/h2c-websocket-smuggling/SKILL.md

h2c-websocket-smuggling skillA

h2c-websocket-smuggling is agent-read markdown (skill) from dreadnode/capabilities: Bypass reverse proxy ACLs via H2C upgrade or WebSocket tunnel. Use when proxy blocks internal paths but forwards Upgrade headers, or when standard CL.TE/TE.CL smuggling fails..

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/h2c-websocket-smuggling@git:20260518.7b5f854
Exact content
mdr add dreadnode/capabilities/h2c-websocket-smuggling@sha256:e8fe2bb9301884e2

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_extm3fjm5z5w2d7n.svg)](https://markdownregistry.com/a/art_extm3fjm5z5w2d7n)

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Versions

versioncommittedcommitsizeaudit
git:20260518.7b5f854 latest2026-05-18 7b5f854 4,119 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 (4119 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_extm3fjm5z5w2d7n
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/h2c-websocket-smuggling
GET https://markdownregistry.com/api/v1/blob/e8fe2bb9301884e28d442b42b91b0918d8564a3b92a6b62986a493daa513c3dd

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