Sequential Pipeline

Two agents connected by an edge. The first classifies the user’s intent; the second reads that classification from the workflow context and composes a reply. This classify → respond pattern appears in nearly every customer-facing agent workflow.

What it demonstrates

Connecting two nodes with an edge
Writing intermediate results to working.* context paths
Mixing providers: OpenAI classifies, Anthropic replies
Workflow-level guardrails

Run it

sirenspec run docs/cookbook/sequential-pipeline/workflow.yaml --input "My order hasn't arrived yet."

Workflow

docs/cookbook/sequential-pipeline/workflow.yaml

version: "0.1"

agents:
  classifier:
    model: "openai:gpt-4o-mini"
    system: |
      Classify the user's message into one of these intents: question, complaint, feedback, other.
      Respond with ONLY the intent label, nothing else.

  replier:
    model: "anthropic:claude-haiku-4-5-20251001"
    system: |
      You are a customer support agent. The user's intent has been classified.
      Compose a short, helpful reply appropriate for that intent.

nodes:
  classify:
    agent: classifier
    writes: working.intent

  reply:
    agent: replier
    writes: output.reply

edges:
  - from: classify
    to: reply

guardrails:
  - injection
  - length

This workflow mixes providers: OpenAI handles classification, Anthropic writes the reply. Each agent independently resolves its own provider at runtime.

How data flows

classify receives the user’s message and writes a single intent label (e.g. "complaint") to working.intent.
reply receives the output of classify as its user message and composes the final response.

Basics

Multi-Agent Patterns

Swrm & Fan-Out

Factory & Iteration

Guardrails

Human in the Loop

Budget & Cost Control

Stress Tests

Tool Nodes

Sequential Pipeline

What it demonstrates

Run it

Workflow

How data flows

Graph

Next steps

Conditional Pipeline

Telephone Game

​What it demonstrates

​Run it

​Workflow

​How data flows

​Graph

​Next steps

Conditional Pipeline

Telephone Game

What it demonstrates

Run it

Workflow

How data flows

Graph

Next steps