Sinatra in Slack, on every plan
Connect Slack from workspace Settings, then mention @Sinatra in a channel: it works in that thread, posts its progress and answer there, and opens a pull request when the request needs code.
Slack was a preview for a handful of workspaces until now; any owner or admin can connect it today. Each thread is one task, with the same sandbox, billing and tasks-at-a-time limit as a task from Linear or GitHub, and a message sent while the agent runs reaches it the same way. A reply in the thread that mentions Sinatra always continues the task; one without a mention does only when Sinatra judges it's meant for it, so mention it to be certain. A thread doesn't name a repository, so add repo: owner/name when the workspace has more than one, or the agent picks from what you asked. There are no direct messages, no stop control inside Slack (stop a task from the dashboard or the CLI), and channels shared with other organizations stay off until an owner or admin allows them. Setup is at docs.sinatra.dev/docs/configuration/slack.
#1441, #1944, #2006