Let Haruno read channels and post in your Slack workspace through your own sign in. It asks before it writes, and scheduled tasks never use it.
Mac appAvailableUsed in chats only. A scheduled task never uses Slack.
Windows appAvailable
Slack is a connector in the Communication section of the Connectors window. Its row reads Post messages and read channels in your workspace.
What Haruno can do
Haruno connects to Slack's own connection for your workspace and uses the account you sign in with. Slack decides which tools it offers. After you connect, the row shows the workspace name and how many tools Haruno found.
Slack covers reading channels and posting messages. Its tools also include replying in a thread and scheduling a message.
Haruno signs in as you. It can reach what your Slack account can reach, and what it posts appears under your name.
Connect
You need to be signed in to Haruno first. If you are not, the row says to sign in to Haruno before connecting Slack.
Click Sign in
Click it on the Slack row in Connectors.
Approve in your browser
Haruno opens a Slack page in your browser. The row says Finish signing in in your browser…. Choose the workspace and approve. Click Cancel to stop.
Come back to Haruno
The row shows the workspace name and the number of tools. The connector is on.
Use the browser Haruno opens
The sign in link works once, in the browser Haruno opens. Do not copy it into another browser. If you wait about three minutes without finishing, the row says Slack sign-in timed out. Please try again.
The ⋯ menu has Sign out. It removes the sign in from this Mac and asks Slack to end Haruno's access. To sign in again, sign out first.
What Haruno asks first
Require confirmation before posting and writing appears under the row once Slack is connected. It is on until you turn it off. With it on, Haruno asks before any step that writes to Slack. Reading does not ask.
In a scheduled task
A scheduled task never uses Slack. Haruno cannot hold a Slack post for your approval the way it holds an email, so it gives a scheduled task no access at all. Use Slack in a chat, where you see each step. See Scheduled tasks.
Who has it
Everyone, in the normal view and the advanced view. A chat that belongs to a project does not use Slack. See The Connectors window.
What to tell a customer
Sign in to Slack once from Connectors. Haruno signs in as you, so what it posts appears under your name. Keep the confirmation switch on. Slack is for chats only. It is not used by scheduled tasks.