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How to check a GitHub repo before installing it.
Seven steps to know whether a repo is useful to you and reasonable to try. It is the same order I follow before a repo appears in a video.
The 7 steps.
- Check the license.Look for the LICENSE file. MIT, Apache-2.0 and GPL all let you use the code, with different rules; if there is no license, the author keeps all rights and you have no clear permission to use it. What happens without a license.
- Check that it is still alive.Look for the “archived” notice, the date of the last commit, the open issues and the published releases. An abandoned repo gets no security fixes. What an archived repo is.
- Read the whole README.Especially the requirements, the warnings and the known issues. If the README does not say what it installs or what it needs, that is a bad sign.
- See what is going to be installed.Check the dependencies and the install scripts. Be wary of “curl … | bash” style commands that come from a domain that is not the official one.
- Find out who maintains it.A person or organization with a track record, several contributors and published releases inspires more trust than a newly created account. OpenSSF Scorecard automates several of these checks. OpenSSF Scorecard.
- Try it in isolation.Use a virtual machine, a container or a user with no privileges, and never with your keys or your real data. If it works, then you bring it to your own machine. Docker security.
- Ask for a second read.You can ask an AI agent to explain what a script does before you run it. It is a help, not a verdict.
Red flags.
- It has no license, or the license does not match what the README says.
- It is archived and does not say what to use instead.
- The installer downloads and runs things from a site that is not the official one.
- It asks for permissions or access it does not need for what it does.
- Its name looks a lot like a famous repo's, but the account is a different one.
A single flag does not condemn a repo, but several together are a reason not to install it. This is how the fact sheet and the channel rules work.
An example: we check scrcpy.
We apply the steps to scrcpy: license Apache-2.0, official repo at github.com/Genymobile/scrcpy, requirements and limits taken from its documentation. The full fact sheet shows where each fact comes from and the review date (2026-10-29).
Frequently asked questions.
- Is a repo with lots of stars safe?Not necessarily. Stars measure popularity, not quality or security. Look at the license, the recent activity and what it installs.
- What happens if a repo has no license?By default, the author keeps all rights: you can look at it, but you have no clear permission to use or modify it. Ask the author or look for another option.
- What does it mean for a repo to be archived?That its author left it read-only: it no longer gets changes or security fixes. It is good for learning, not for depending on.
- Can I ask an AI to check the repo?Yes, to have it explain what a script does or what it installs. It is a help, not a verdict: the decision is still yours. Which agents exist.
This guide is a rough orientation and does not guarantee that a repo is safe. Updated October 29, 2026.