Joined February 2020
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Could you build Claude Code yourself? We’re betting you can. Introducing our newest challenge: Build Your Own Claude Code app.codecrafters.io/courses/… 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 discover what’s generally under the hood.
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An extraordinary day. Our repo is #1 on GitHub by stars. And the first-ever to hit 500k.
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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 agents perform on tasks that aren't part of public training data? ccbench.org/ Does your favourite agent top the rankings?
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Could you build Claude Code yourself? We’re betting you can. Introducing our newest challenge: Build Your Own Claude Code app.codecrafters.io/courses/… 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 discover what’s generally under the hood.
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This challenge is still in beta. So it's free to try! It's live in 5 languages currently. Support for more languages coming soon.
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Replying to @rauchg
Here’s a master list of ideas github.com/codecrafters-io/b…
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IIT BHU, welcome to the party. We're making CodeCrafters free for all @IITBHU_Varanasi students, staff and alumni.
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You're invited to the underground coding club, UC Berkeley. CodeCrafters is now free for all @UCBerkeley students, alum, and staff. codecrafters.io/berkeley
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We finally got into IIT. Today we're announcing our partnership with @iitroorkee to make CodeCrafters free for its students, staff and alumni. codecrafters.io/iitr Silicon Valley's favourite challenges. Now at IIT Roorkee.
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Today we're making CodeCrafters free for students, staff, and alumni of @NUSingapore. Silicon Valley's favorite coding challenges. Now making its way through Singapore. codecrafters.io/nus

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This repository is a compilation of well-written, step-by-step guides for re-creating our favorite technologies from scratch.
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19 Nov 2024
Codecrafters wants to challenge seasoned developers with hard-to-build projects tcrn.ch/49ekcXn

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Tune in tomorrow for a Q&A with Joe & Stepan, the founders of @instant_db Instant is a modern Firebase that makes you productive by giving your front end an easy, real-time database. It is backed by Paul Graham, Greg Brockman, Amjad Masad and many more. Set a reminder here to speak with Joe & Stepan: x.com/i/spaces/1OdJrXBVyeyKX
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Join us in our first ever X Spaces session. We're hosting @JoeAverbukh & @stopachka , the founders of @instant_db. Set a reminder here:  x.com/i/spaces/1OdJrXBVyeyKX
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Starting this week. Stay tuned.
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Today, we're joining @getsentry, @convex and others, in going Fair Source. codecrafters.io/blog/fair-so…
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Today, we’re announcing our latest challenge: Build your own Interpreter. app.codecrafters.io/courses/…
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Ultimately, you’ll discover how programming languages work and how code is executed, at a fundamental level. Get started here: app.codecrafters.io/courses/… The challenge is completely free while in beta.
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