# Slack Slack () is a proprietary set of tools for team collaboration. It offers various integration with different services. We have a workspace at . The CSL's first widespread use of the Slack workspace began in August of 2018. Slack became the official form of communication under the direction of Omkar Kulkarni. It was replaced by Mattermost in December 2019 because Slack's free plan only allows for three months of message history and the school didn't want to pay for it. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://documentation.tjhsst.edu/technologies/tools/slack.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.