`pull-file` is a Node.js library that provides a pull-streaming file reader, built directly on low-level stream functions instead of Node's `fs` streams. It's designed for developers working with pull-streams who need to read files in a streaming manner, with support for all standard `fs.createReadStream` options plus a `live: true` mode for tailing files. The library is particularly useful for those implementing pull-stream-based data processing pipelines that require file input.