Actually, we are in the works of releasing a Slack connector. Star a message or DM in Slack and see it as a task in Taco. Taco only asks for and obtains access to your starred messages (on https://api.slack.com/docs/oauth-scopes, "stars:list" and "stars:remove"), not all archives. Shoot us an email at support@tacoapp.com if you'd like to help us test it out!