Pipelines
Parallel Branches
Run named branches concurrently inside a pipeline.
Use .parallel(...) when independent work can run from the same input. Each branch is a pipeline operation, and the output is an object keyed by branch name.
1. Create Branches
const summaryBranch = new PipelineBuilder<string>()
.step((ticket) => `Summarize:\n\n${ticket}`)
.prompt(summarizer)
.build();
const priorityBranch = new PipelineBuilder<string>()
.step((ticket) => `Classify priority:\n\n${ticket}`)
.prompt(priorityAgent)
.build();2. Run Them in Parallel
const pipeline = new PipelineBuilder<string>()
.parallel({
summary: summaryBranch,
priority: priorityBranch,
})
.build();3. Read the Branch Output
const result = await pipeline.run("Checkout is down for enterprise users.");
console.log(result.summary);
console.log(result.priority);The branch names become the output keys.
4. Continue After Branching
const pipeline = new PipelineBuilder<string>()
.parallel({
summary: summaryBranch,
priority: priorityBranch,
})
.step((result) => ({
title: result.summary.slice(0, 80),
priority: result.priority,
}))
.build();Use parallel branches for independent checks. If one stage depends on another stage's output, keep it linear.