What are Claude Code Skills?

Claude Code Skills are reusable prompt templates stored as markdown files in your project's .claude/skills/ directory. They let you codify best practices and common workflows into slash commands that Claude follows consistently.

How do I create a Claude Code Skill?

Create a markdown file in .claude/skills/ with instructions for Claude. The filename becomes the command name — for example, .claude/skills/code-review.md can be invoked with /code-review during a Claude Code session.

Can I share skills with my team?

Yes. Skills stored in .claude/skills/ can be committed to version control so every team member has access to the same standardized workflows. You can also organize skills into subdirectories by category.

What is the difference between project and global skills?

Project skills (.claude/skills/) are specific to the current project and are committed to git. Global skills (~/.claude/skills/) are personal skills available across all your projects.

tcp-from-scratch

New

21GitHub TrendingGeneralby maxcelant

Create L3/L4 network protocols from scratch

About this Skill

This skill enables developers to design and implement custom L3/L4 network protocols from scratch, including TCP, UDP, and IP variants. It provides guidance on packet structure, state machines, and socket programming, making it useful for building low-level networking tools or learning protocol internals.

Install & Usage

Create the skills directory

mkdir -p .claude/skills

Download the skill file

mkdir -p .claude/skills && curl -o .claude/skills/tcp-from-scratch.md https://raw.githubusercontent.com/maxcelant/tcp-from-scratch/main/SKILL.md

Invoke in Claude Code

/tcp-from-scratch

Use Cases

Implement a minimal TCP stack for an embedded system without an OS.

Create a custom UDP-based protocol for real-time game data transmission.

Build a network sniffer that parses raw IP packets to analyze traffic.

Develop a simple HTTP server from scratch using raw sockets.

Simulate TCP congestion control algorithms for educational purposes.

Design a lightweight reliable transport protocol over UDP for IoT devices.

Usage Examples

/tcp-from-scratch help me implement a three-way handshake in Python using raw sockets

Show me how to construct an IP packet header with custom options

Write a UDP echo server and client from scratch in C

View source on GitHub

Frequently Asked Questions

What is tcp-from-scratch?

How to install tcp-from-scratch?

To install tcp-from-scratch, create the .claude/skills directory in your project, then run the curl command to download the skill file. Once installed, invoke it in Claude Code with /tcp-from-scratch.

What is tcp-from-scratch best for?

tcp-from-scratch is a community categorized under General. Created by maxcelant.

What can I use tcp-from-scratch for?

tcp-from-scratch is useful for: Implement a minimal TCP stack for an embedded system without an OS.; Create a custom UDP-based protocol for real-time game data transmission.; Build a network sniffer that parses raw IP packets to analyze traffic.; Develop a simple HTTP server from scratch using raw sockets.; Simulate TCP congestion control algorithms for educational purposes.; Design a lightweight reliable transport protocol over UDP for IoT devices..