Approval

Pause the run until a human decides. The workflow resumes down the approved or rejected port with the decision recorded — the human-in-the-loop primitive for anything with consequences.

Config

The decision prompt, and optionally who to email about it.

• Decision prompt — what the approver sees, template-rendered: Approve refund of {{ payload.amount }} for {{ payload.email }}?
• Slack connection + channel — post the prompt to Slack as a message with Approve / Reject buttons. A click decides, and the message rewrites itself to "Approved by @who" so the channel keeps the audit trail and nobody can click twice. Deciders never leave Slack.
• Approvers — comma-separated Slack user ids or account emails. Each approver gets a direct message with the same buttons the moment the run pauses — use it instead of (or alongside) the channel post when the decision belongs to specific people.
• Channel + Approvers — the provider-agnostic form: pick slack, email, or text, list the approvers (member ids or emails, addresses, or workspace-verified phone numbers), and each gets the prompt through that channel. Text approvers decide by replying YES or NO to the platform number.
• Notify — an email address. The moment the run pauses, it gets the prompt with signed one-click Approve / Reject links (valid 7 days, no sign-in needed).

Every approval can also be decided in-app from the run's page (Runs → the waiting run → Approve / Reject) by any workspace member — so a step with no Slack or email configured is still decidable.

Output

{ "decision": "approved",
  "decided_at": "2026-08-26T14:00:00Z",
  "metadata": { "via": "email_link" } }

Note the payload is replaced by the decision record — carry forward anything downstream needs with set fields before the approval, or reference earlier steps by id.

Patterns

• Spend gate — if routes orders over $1,000 through approval; the rest skip it.
• Content review — AI drafts a reply, a human approves it, then the send fires.

Gotchas

• Wire both ports. An unwired rejected branch means a rejection just ends the run silently — usually you want at least a notification.
• The run stays paused until someone decides — write a prompt with enough context to decide from Slack or an inbox without opening MadMax.