slack-go/slack is a Go library that provides programmatic access to the Slack API.
The library addresses the need to interact with Slack from Go applications by wrapping the Slack REST API and supporting real-time communication through both the Real-Time Messaging protocol over websocket and Socket Mode. It handles connection management, retries, and event routing automatically. The tool covers most or all of the api.slack.com REST endpoints and provides multiple communication patterns depending on application requirements.
Developers should choose this library if they are building Go applications that need to integrate with Slack. It suits projects ranging from simple API calls to complex real-time applications. The README explicitly recommends Socket Mode as the preferred approach for most applications over the older Real-Time Messaging protocol. The library includes built-in retry support, configurable for 429 rate-limit responses only or for broader failure scenarios including connection and optional 5xx errors. A SocketmodeHandler utility is available to simplify event routing and callback registration when using Socket Mode.
The project maintains compatibility with officially supported Go versions. Development activity shows consistent attention to testing infrastructure and code quality standards, with contributors expected to run formatting, linting, and test checks before submitting changes. The project explicitly notes that no major version has been released, meaning minor version updates may introduce backward incompatible changes, so adopters should monitor releases carefully.
