ci-info is a Node.js library that detects and provides details about the current Continuous Integration (CI) environment. It supports numerous CI platforms, including GitHub Actions, Travis CI, and Jenkins, and offers properties like `ci.isCI` to check if the code is running in CI, `ci.name` for the CI server's name, and vendor-specific constants for platform detection. It's designed for developers who need to tailor their code behavior based on the CI environment.