joshuakgoldberg/package-change-detector-action

Package Change Detector Action is a small tool for teams who use GitHub to manage their code. It watches pull requests and tells you whether someone modified specific parts of a project's package.json file, the file that describes a JavaScript project's dependencies, required tools, and other metadata. Instead of manually checking whether a contributor bumped a Node version requirement or changed a dependency, you can plug this action into your workflow and get a simple yes-or-no answer automatically. At a high level, you add this action to a GitHub workflow that runs on pull requests. You tell it which properties in package.json you care about, for example, engines, which specifies which versions of Node or npm your project requires. When a pull request comes in, the action compares the relevant bits of the file and sets an output variable called changed to true or false. Your workflow can then use that answer to trigger other steps, like running extra tests, posting a comment, or flagging the change for review. The people who'd reach for this are typically maintainers of open-source projects or engineering teams with established CI pipelines. Say you maintain a popular library and contributors regularly submit pull requests. If someone changes the Node version your package supports, you might want to run compatibility tests across multiple Node versions before merging. This action lets your workflow detect that change and act on it without anyone having to remember to check manually. The README is fairly sparse and doesn't go into much detail beyond the basic usage example. It's written in TypeScript with strict type checking, which suggests the author cares about correctness, but there's little documentation about edge cases, supported property formats, or advanced configuration. The project appears to be early-stage given its low adoption, so if your needs go beyond simple property detection, you may find yourself reading the source to understand what's possible.