CodeCrafters

@codecraftersio

Build your own Git, BitTorrent, SQLite from scratch - in Rust, Go, JS, etc. Develop robust CS fundamentals. Refine your programming judgement & taste.

San Francisco

codecrafters.io

Joined February 2020

Pinned
CodeCrafters
@codecraftersio
Feb 7
Could you build Claude Code yourself? We’re betting you can. Introducing our newest challenge: Build Your Own Claude Code app.codecrafters.io/courses/claude… You’ve been treating AI agents like a black box. It’s time to crack the box open. Build a working coding agent step-by-step and
CodeCrafters
@codecraftersio
Feb 27
Introducing our new website. Build something you didn't think you could.
CodeCrafters | Rebuild Redis, Git & SQLite From Scratch
From codecrafters.io
CodeCrafters
@codecraftersio
Feb 12
Is your coding agent really smart or did it just memorize the test answers? Today we're launching CCBench, a benchmark for evaluating coding agents on small-scale codebases (<10k LoC) that aren't part of LLM training data. It's designed to answer a simple question: How well do
CodeCrafters
@codecraftersio
Feb 7
Today we're announcing to give $4,000/yr/engineer to the open source projects we depend on.
Our OSS Funding Pledge
From codecrafters.io
CodeCrafters
@codecraftersio
Sep 5, 2025
You're invited to the underground coding club, UC Berkeley. CodeCrafters is now free for all @UCBerkeley students, alum, and staff. codecrafters.io/berkeley