Koa Bunyan Logger Middleware

Koa-bunyan-logger is a Koa middleware designed for integrating structured logging into Koa v2.x applications, leveraging the popular Bunyan logging library. The current stable version is 2.1.0. While its release cadence has been infrequent, updates typically coincide with significant Koa version shifts or critical bug fixes. This library aims to be flexible and lightweight, allowing applications to customize logging behavior without excessive overhead. A key differentiator is its ability to provide flexible log context, request logging, and explicit support for ignoring specific paths, ensuring that only relevant requests generate log entries. It allows passing an existing Bunyan logger instance or creating a new one with options, and handles request IDs for tracing. It provides middleware specifically for setting request context and logging request/response cycles, including duration and status-based log levels. This package is built on CommonJS but can be imported into ESM projects via interop.