How to Tell if an Open-Source Project Is Safe to Depend On

Picking an open-source tool is a bet. You are wagering that it will still be maintained, still be secure, and still fit your needs in two years. Most of the time that bet pays off. The goal of this post is to help you avoid the cases where it does not.

Here is what to look at, roughly in order of how much it tells you.

Start with the commit history, not the star count

Stars measure how many people liked a project once. They do not measure whether it is alive today. Open the commit graph instead.

• Is there activity in the last three months? A gap is not automatically bad, but it is a question to answer.
• Are commits spread across the codebase, or just dependency bumps? A repo where the only recent activity is an automated dependency bot is on life support.
• Do commits cluster around releases, or is it a steady trickle? Steady is healthier.

A mature, "finished" library can legitimately go quiet. A web application or anything touching the network cannot, because the world around it keeps changing.

Count the people who actually matter

Look at the contributor list, then look at who wrote the last 50 merged pull requests. Often the answer is: one person.

A single-maintainer project is not disqualifying. Plenty of excellent tools are one person's work. But you should know that going in, because it changes your risk:

• What happens if that person loses interest, burns out, or changes jobs?
• Is there a second person with commit access who could take over?
• Is the knowledge in the code and docs, or only in the maintainer's head?

If a project is critical to you and has exactly one maintainer, plan for the possibility that you become the maintainer of your own fork someday.

Read how they handle issues and pull requests

This tells you more about a project's future than the code does.

• Open a few recent issues. Do maintainers respond? Are the responses helpful or dismissive?
• Look at closed pull requests from outside contributors. Do they get reviewed and merged, or do they rot for months and get closed by a stale bot?
• Check the age of the oldest open issues. Hundreds of untouched issues from years ago is a signal that reports go into a void.

A project that engages with contributors will still be here in two years. A project where the maintainer has stopped replying is telling you something.

Check the release and security track record

• Is there a changelog, and does it actually describe changes rather than saying "bug fixes"?
• How are versions handled? Does the project follow semantic versioning, or do minor releases break things?
• Is there a security policy? A SECURITY.md with a disclosure address is a sign of a project that takes this seriously.
• How fast were past security issues patched? Check the advisories. A project that shipped a fix within days of disclosure has its act together.

Look at the license and the governance

• Is the license actually open source, or is it one of the "source available" licenses with restrictions? This matters for commercial use. If you are unsure what the license permits, resolve that before you build on it.
• Who owns the project? An individual, a foundation, or a company? Company-backed projects can be well resourced, but they can also be relicensed or discontinued when business priorities shift. Foundation-governed projects are the most stable, and the rarest.
• Is there a public roadmap or a place where direction is discussed? Or do decisions just appear?

Assess the on-ramp

You will eventually need to fix something yourself. How hard will that be?

• Can you build and run the project locally by following the README, in under an hour?
• Are there tests, and do they pass on a fresh checkout?
• Is the code readable? Clone it and spend 20 minutes reading. You do not need to understand everything, but you should be able to follow the shape of it.
• Are the docs written for users, or are they a wiki that stops halfway?

A quick scorecard

Give each a yes or no. More than two or three "no" answers on something important means proceed carefully.

The final question

Ask yourself honestly: if this project were abandoned tomorrow, what would I do?

If the answer is "fork it and maintain the parts I use" and that feels manageable, the project is safe to depend on even if it is small. If the answer is "panic," either pick something with a bigger bus factor or budget the time to build that fork-maintenance capability now, while nothing is on fire.