Documentation is the only part of a plugin that tells you whether its authors expect you to succeed. You can read a repository's source code for hours and still not know whether the maintainers understand how their tool is actually used. But a documentation set reveals that in about ten minutes - if you know what to look at.
1. Start With the Quickstart, Not the API Reference
The quickstart is the single most revealing page in any documentation set. A good one gets a working installation in under five minutes, on a clean machine, using only what is written on that page. If you find yourself following an unstated assumption - a config file that is never shown, an environment variable that appears only in a later section - that is a maintenance signal, not an oversight.
- Does it state the exact versions it was tested against?
- Does it show the expected output, not just the command?
- Does it work if you follow it literally, with no prior knowledge?
- Does it tell you how to verify the install succeeded?
2. Check Whether Examples Are Runnable
Copy-paste is the honest test. Take the first substantial code example in the docs and paste it into a fresh file with no edits. If it fails, ask why: is it a typo, a missing import, or a stale API that changed two major versions ago? The third possibility is the dangerous one, because it means nobody ran the docs during the upgrade.
The stale example heuristic
When an example imports from an old package path or uses a callback style that the library abandoned, expect the rest of that page to be equally dated. Stale examples almost never appear alone.
3. Look for the Error Paths
Documentation that only covers the happy path is advertising, not documentation. Search the docs for words like 'error', 'fails', 'troubleshooting', and 'permissions'. A mature documentation set will tell you what goes wrong, what the error message means, and what to do about it. A thin one will assume nothing ever breaks.
4. Verify the Versioning Story
Does the documentation correspond to a specific version, or is it an undated blob that claims to describe everything? Look for a version selector, a changelog link, or migration guides between major releases. Migration guides are the strongest single signal of a maintained project, because writing one costs real effort and only pays off if the maintainers intend to keep going.
5. Read the Contribution and Support Sections
These sections tell you what happens on a bad day. A documented issue template, a stated response window, a security disclosure policy, and a visible commit cadence all indicate that the project has an operating model. Their absence does not mean the plugin is bad - but it does mean that when something breaks, you are on your own.
The Ten-Minute Checklist
- Quickstart: does it produce a working install if followed literally?
- Examples: do they run unedited?
- Errors: are failure modes documented with meanings and fixes?
- Versioning: is there a changelog and at least one migration guide?
- Support: is there an issue template and a stated response expectation?
- Freshness: is the most recent doc commit within the last six months?
Run this checklist against three plugins you already use, and you will calibrate your own threshold quickly. The point is not to demand perfection - it is to know, before you commit, what kind of support you are buying into.