ECC: the Claude Code config from an Anthropic hackathon winner (and how to install it)
The open-source Claude Code config built by an Anthropic hackathon winner (more than 225,000 GitHub stars): 271 skills, 67 agents and 92 commands, free, and how to install it on your tool in two minutes.
July 1, 2026 · 5 min read
Everyone spends hours building their Claude Code config brick by brick: a skill here, an agent there, a few homemade commands. Meanwhile, the winner of an Anthropic hackathon open-sourced his, for free, and it already contains everything you are trying to piece together. It is called ECC, and it has passed 225,000 stars on GitHub. One command, and Claude Code goes from an assistant that answers to a pro-level assistant.
ECC is an open-source repository under the MIT license (so free, reusable) that loads 271 ready-to-use skills, 67 specialized agents and 92 commands into your tool in one shot. All maintained and updated every week. This guide shows you what is inside and how to install it in two minutes, without drowning in it.
The Claude AI Lab is my Skool community where I share my Claude systems and the more advanced modules. Entry is free.
Join the Lab →ECC is not a product to buy. It is an open-source config you load into the tool you already use, in one command, and that you can remove just as fast.
What is inside ECC
Three main building blocks, plus a system that holds it all together.
You will not see all 271 skills at once. Your assistant picks the right one for the task. You get the result without managing the machinery.
Installing it in two minutes
One command. You just swap the target for your tool (cursor, codex or gemini instead of claude).
npx ecc-install --profile core --target claude
--target cursor, --target codex or --target gemini. The config adapts to the tool.git clone the repo, then ./install.sh --profile core --target claude. Same result, more control.Do not stack two install methods. If you already installed through the plugin, do not rerun the full installer on top: you would create duplicate skills and behaviors. One method, that is it.
Where to start once installed
Do not go exploring all 271 skills by hand. Ask your assistant to show you what it gained, then test one agent on a real need.
One agent tested on a real need beats ten skills you will never open. Pick the task that weighs on you most this week and run the agent that covers it.
How to get value without spreading yourself thin
With 271 skills and 67 agents, the temptation is to try everything on the first night. That is the surest way to close the tool without getting anything out of it. Install the core profile, take inventory, and pick one thing to test: a security review, a build to fix, a state of the art to produce.
Once that use is part of your routine, you add another. That is how a huge config becomes useful: not by admiring it, but by using one agent at a time, on tasks you actually had to do.
ECC gives you in one command what most people spend months assembling. The value is not in the number of skills, it is in the two or three you actually use.
Want to go further?
In the Lab, I share the configs, instructions and architectures I keep refining to turn Claude into a real copilot.
A dedicated session or program, tailored to your tools and use cases.
And day-to-day, I post one reel a day on Instagram: @quentin_iamarketing