Author a service

These five guides are the sequence a service is written in, and each may assume the one before it. For a complete worked example first, follow Build an orders API end to end. Then come back here for the task you are on.

• Author a workflow writes the logic: reaching request data, branching, grouping tasks and stopping early, calling out of process, and deciding what a failure does.
• Configure a channel exposes it: the route, sync or async, and only the guards the endpoint needs.
• Connect a database or API reaches outside: a connector with its credentials by reference, its operation gates, and the two data APIs to choose between.
• Test a workflow offline proves it with no server: format, lint, dry-run with stubs, and a case-file regression suite for CI.
• Version and roll out changes ships a change: cut a version, preflight the activation, roll it out to a share of traffic, and roll back.

Last verified 14 September 2026