af-xdp SKILL.md skillA

af-xdp from outlinedriven/outline-driven-development is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add outlinedriven/outline-driven-development/af-xdp@git:20260912.07a8a1b

Pins git:20260912.07a8a1b in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
outlinedriven/outline-driven-development
Path
.devin/skills/af-xdp/SKILL.md
Versions recorded
2
Latest version
git:20260912.07a8a1b, committed Sep 12, 2026
First version recorded
Sep 5, 2026
Size
7,436 bytes
Repository stars
53
License
Apache-2.0

Use when creating AF_XDP sockets, configuring UMEM and XSK rings, writing an XDP redirect program, or choosing copy versus zero-copy mode. Not for full kernel bypass: use dpdk.

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

# AF_XDP sockets

## Contract

| Field | Bound contract |
|---|---|
| Trigger | Building a userspace packet path on AF_XDP: UMEM and ring setup, an XDP redirect program, the RX loop, copy versus zero-copy mode, or an AF_XDP versus DPDK decision. |
| Authority | Read-only. Writes nothing. Chat output only. No remote mutation. |
| Side effect | Returns setup code, ring lifecycle rules, and a mode recommendation. No source files are modified. |
| Done | The socket setup code, the fill-ring refill rule, the redirect program, and a mode choice tied to driver support are delivered. |

## Inputs

1. Interface and queue (required): the interface name and the RX queue the socket serves. One socket per queue.
2. Mode intent (optional): copy or zero-copy. Default to copy and confirm from the bind.
3. Build setup (optional): libbpf installed (`pkg-config --libs libbpf` returns `-lbpf`; `-lxdp` when libxdp is installed separately).

## Procedure
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add outlinedriven/outline-driven-development/af-xdp@sha256:c025c55b68134f06

The line at the top of this page pins the label git:20260912.07a8a1b, 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_sjqomgczbackv2ai.svg)](https://markdownregistry.com/a/art_sjqomgczbackv2ai)

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

Versions

The registry has recorded 2 versions of this file, between Sep 5, 2026 and Sep 12, 2026, about one every 7 days.

versioncommittedcommitsizeaudit
git:20260912.07a8a1b latest2026-09-12 07a8a1b 7,436 BA view · diff
git:20260905.fd53e992026-09-05 fd53e99 7,431 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (7436 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

outlinedriven/outline-driven-development · 53 stars · license Apache-2.0 · pushed 2026-09-28 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_sjqomgczbackv2ai
GET https://markdownregistry.com/api/v1/resolve?ref=outlinedriven/outline-driven-development/af-xdp
GET https://markdownregistry.com/api/v1/blob/c025c55b68134f06ee4f37cc5d66e6e5c2608ef89e44634f0cd5b55a048afb39

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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