Build your own Git, SQLite, & Redis.
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The GitHub presence of CodeCrafters, known by the username codecrafters-io, features a wide range of repositories primarily written in Go, Shell, TypeScript, Ruby, Rust, and Python. Notable projects include 'build-your-own-x', which guides users to recreate popular technologies, and 'learning-stipends', which lists companies that support engineers with learning stipends.
Top languages
Public repositories
build-your-own-x
Master programming by recreating your favorite technologies from scratch.
learning-stipends
Companies that support engineers with learning stipends
build-your-own-redis
Definition for the redis challenge.
languages
Powers multi-language support for CodeCrafters challenges
build-your-own-sqlite
Definition for the sqlite challenge.
build-your-own-git
Definition for the git challenge.
frontend
Rebuild complex systems from scratch
build-your-own-http-server
Definition for the http-server challenge.
course-sdk
A rewrite of course-sdk, with better developer ergonomics
build-your-own-bittorrent
Definition for the bittorrent challenge.
binspec
No description provided for this repository.
build-your-own-interpreter
Definition for the interpreter challenge.
build-your-own-kafka
Definition for the kafka challenge.
build-your-own-shell
Definition for the shell challenge.
build-your-own-docker
Definition for the docker challenge.
ccbench
A benchmark for coding agents
redis-tester
No description provided for this repository.
build-your-own-grep
Definition for the grep challenge.
cli
CodeCrafters CLI to run tests
build-your-own-dns-server
Definition for the dns-server challenge.
build-your-own-claude-code
Definition for the claude-code challenge.
docs
Documentation for codecrafters users and contributors
language-dashboard
Language dashboard for CodeCrafters challenges.
sqlite-starter-rust
No description provided for this repository.
docker-explorer
A test program to help with the Docker challenge
redis-starter-go
Golang starter for the 'Build Your Own Redis' challenge
redis-starter-python
Python starter for the 'Build Your Own Redis' challenge
http-server-tester
No description provided for this repository.
legacy-course-sdk
Shared code to test course definitions
redis-geocoding-algorithm
An explainer on how Redis's geocoding algorithm works
git-tester
No description provided for this repository.
sqlite-starter-go
Go starter code for "Build your own SQLite"
sqlite-tester
No description provided for this repository.
ansi101
ANSI Escape Sequence Visualizer
shell-tester
Tester for the shell challenge.
git-starter-rust
Starter repo for the Build your own Git challenge
redis-starter-rust
No description provided for this repository.
sqlite-starter-python
Python starter code for "Build your own SQLite"
docker-starter-c
C starter for the 'Build your own Docker' challenge
docker-tester
No description provided for this repository.
language-templates
No description provided for this repository.
course-template
Template for new course repositories
dns-server-tester
Tester for the dns-server challenge.
bittorrent-tester
Tester for the "Build your own BitTorrent" challenge
docker-starter-rust
No description provided for this repository.
sample-sqlite-databases
Sample databases for the "Build your own SQLite" challenge
interpreter-tester
Tester for the interpreter challenge.
code-walkthroughs
Source code for CodeCrafters Code Walkthroughs
build-your-own-gleam-chess-bot-js
Definition for the gleam-chess-bot-js challenge.
sqlite-starter-csharp
No description provided for this repository.
redis-starter-java
No description provided for this repository.
tester-utils
No description provided for this repository.
kafka-tester
Tester for the kafka challenge.
http-server-starter-python
No description provided for this repository.
http-server-starter-go
No description provided for this repository.
build-your-own-gleam-chess-bot
Definition for the gleam-chess-bot challenge.
instant-pull-request-action
Create Pull Requests automatically when a branch is pushed to
http-server-starter-rust
No description provided for this repository.
react-starter-javascript
No description provided for this repository.
environment-python
No description provided for this repository.
git-starter-ruby
No description provided for this repository.
active_prompt
ActivePrompt is a library to manage LLM prompts
sqlite-starter-swift
No description provided for this repository.
redis-starter-clojure
No description provided for this repository.
lobbyside-react
React SDK for rendering custom Lobbyside widget UIs against live state — the host-side identity, CTA, and join-call action without our default card.
llm-rules-test
Custom runner for LLM rules that help validate stage instructions
grep-tester
No description provided for this repository.
test-runner-builder
No description provided for this repository.
bittorrent-test-seeder
No description provided for this repository.
build-your-own-course-slug-1
Definition for the course-slug-1 challenge.
builder
Builds images for execution on CodeCrafters.
grep-starter-go
No description provided for this repository.
ember-codemirror
No description provided for this repository.
redis-starter-cpp
No description provided for this repository.
grep-starter-rust
No description provided for this repository.
redis-starter-javascript
No description provided for this repository.
tester-template
No description provided for this repository.
homebrew-tap
Homebrew Tap
claude-code-tester
Tester for the claude-code challenge.
codecrafters-action
A GitHub Action to setup the test environments for codecrafters challenge testers.
git-sample-1
Sample repository used to test solutions for the Git challenge
code-example-previews-stg
No description provided for this repository.
go-linewriter
No description provided for this repository.
redis-solution-go
No description provided for this repository.
redis-starter-php
No description provided for this repository.
docker-starter-nim
Nim starter code for the "Build your own Docker" challenge
gleam-chess-bot-tester
Tester for the gleam-chess-bot challenge.
sqlite-starter-ruby
No description provided for this repository.
gleam-chess-bot-js-tester
Tester for the gleam-chess-bot-js challenge.
grep-starter-haskell
No description provided for this repository.
stagegen
No description provided for this repository.
learning-stipends-1
Companies that support engineers with learning stipends
writers-stg-tester
Tester for the writers-stg challenge.
rain
🌧 BitTorrent client and library in Go
git-sample-3
Sample repository used to test solutions for the Git challenge
dummy-tester
Tester for the dummy challenge.
docker-starter-ruby
No description provided for this repository.
git-starter-kotlin
Starter repo for the Build your own Git challenge
bittorrent-test-tracker
No description provided for this repository.
sqlite-starter-javascript
No description provided for this repository.
Frequently asked questions
What does codecrafters-io build on GitHub?
Codecrafters-io builds educational resources and projects aimed at helping developers learn by recreating technologies from scratch. Their repositories include challenges for building systems like Git, SQLite, Redis, and more.
Which programming languages does codecrafters-io use?
The primary programming languages used by codecrafters-io include Go, Shell, TypeScript, Ruby, Rust, and Python. This diverse language stack supports various educational challenges and projects.
Are codecrafters-io's repositories public?
Yes, all repositories belonging to codecrafters-io are public on GitHub. This allows users to access, contribute, and learn from the challenges and resources provided by the organization.
Is this exposure intended?
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