Patterns

Patterns are the technical building blocks of Barnum workflows. Each pattern isolates a single combinator concept with code pulled directly from the demos.

Pattern	Combinator	What it does
Serial execution	pipe, .then()	Chain steps sequentially
Parallel execution	all, forEach	Run work concurrently, collect results
Branching	branch	Route on tagged unions
Looping	loop	Retry until a condition is met
Error handling	tryCatch	Catch failures, route to recovery
Timeout	withTimeout	Race a handler against a timer
Racing	race	First to finish wins
Context and variables	bind, bindInput	Share data across pipeline steps
Early return	earlyReturn	Exit a scope before it finishes
Recursion	defineRecursiveFunctions	Mutual and general recursion

For real-world workflows that combine these patterns, see the Repertoire.