Slack is also a large scale user of Hack: https://slack.engineering/streamlining-your-workflow-debugging-for-hhvm-effd7db3c72d https://slack.engineering/stream

Slack is also a large scale user of Hack: https://slack.engineering/streamlining-your-workflow-debugging-for-hhvm-effd7db3c72d https://slack.engineering/streamlining-your-workflow-debuggi...