Cookbook

Recurring patterns, each worked through once so you don’t have to derive it under deadline. Every entry follows the same structure: the problem, the pattern that solves it (with a concrete JSON example), why this shape works, common variations, and see also pointers into the Reference for the formal semantics.

The entries assume the vocabulary of the tour; read that first if a construct here is unfamiliar.

In this section

• Polling with timeout — Loop and Timeout composed around repeated status checks against a slow operation.
• Fan-out and partial success — Gather with an explicit completion policy, and shaping step.results when some dispatches fail.
• Retry composition — multi-policy Retry, where Timeout sits relative to it, and three-layer stacks.
• Pagination accumulation — Loop’s carried value driving a cursor, with vars accumulating pages.
• Saga-style compensation — catch routing to compensation Steps that undo partial work, then re-raise.
• Cleanup with Finally — audit writes and resource release that run on every exit, including teardown.
• Conditional middleware — when predicates turning operational behavior into parameters.
• Wrapping work in a subflow — the inline-Flow idiom for per-dispatch behavior, shared deadlines, and refactoring seams.