Individual skill

af-xdp

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.

.devin/skills/af-xdp/SKILL.md

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Last checked: Nov 4, 2026

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Repository stars (not skill ratings): 55
Repository last updated: Sep 28, 2026
License: Apache-2.0

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# 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.