Exercise 4: Connecting Multiple Workflows
Build an intelligent email response system by connecting three separate workflows together: a master orchestrator, an email classifier, and an LLM-as-a-judge response generator.
75-Minute Hands-On Exercise
This exercise teaches you to build complex automation systems by connecting multiple workflows together. Learn how to create modular, reusable workflows that can call each other, passing data between them to solve complex business problems. Think of it like conducting an orchestra—each workflow plays its part, and you’re coordinating them into a harmonious system.
The Problem: As automations grow, building everything in one workflow creates unmanageable “spaghetti code.” You can’t reuse logic, debugging becomes difficult, and multiple people can’t work on different parts. You need a modular approach where workflows call each other like functions in programming.
What You’ll Build
A complete multi-workflow orchestration system featuring:
- Master orchestrator workflow that fetches emails and coordinates sub-workflows
- Email classifier sub-workflow that categorises incoming messages
- Response generator sub-workflow that creates quality-controlled replies
- Execute Workflow Triggers enabling inter-workflow communication
- Structured data passing with defined inputs and outputs between workflows
- Dual triggers allowing standalone testing and production orchestration
graph TB
A[Master: Fetch Email] --> B[Call Classifier]
B --> C[Receive Category]
C --> D[Call Generator]
D --> E[Receive Response]
E --> F[Master: Send Reply]
style A fill:#e1f5fe
style B fill:#fff3e0
style D fill:#ffecb3
style F fill:#e8f5e9
Restaurant Kitchen Analogy:
Just like a head chef coordinates specialized stations:
- Head Chef (Master Workflow) receives orders and coordinates
- Prep Station (Classifier) categorises and prepares ingredients
- Main Kitchen (Generator) cooks the dish with quality checks
- Head Chef plates and serves the final product
Skills You’ll Demonstrate
By completing this exercise, you will have demonstrated:
- Workflow Composition: Breaking complex processes into reusable components
- Inter-Workflow Communication: Configuring Execute Workflow nodes and triggers
- Data Contract Design: Defining clear inputs/outputs between workflows
- Dual-Trigger Architecture: Supporting both standalone testing and production orchestration
- Modular System Design: Building maintainable, scalable automation architectures
The Pattern You’ll Master
The Workflow Orchestration & Composition pattern you’ll learn applies to:
- Customer Support: Route tickets → Classify urgency → Generate response → Assign agent
- Content Pipeline: Plan content → Generate drafts → Review quality → Schedule publishing
- Order Fulfilment: Receive order → Check inventory → Process payment → Ship product
- Data Processing: Ingest data → Validate format → Transform structure → Load to database
- Lead Management: Capture lead → Score quality → Enrich data → Route to sales
- Invoice Processing: Extract data → Validate information → Approve payment → Update accounts
Exercise Structure
Quick Navigation
| Section | Description | Duration |
|---|---|---|
| Part A: Setup | Prerequisites, API setup | 15 min |
| Part B: Build & Test | Build three workflows and connect them | 55 min |
| Challenges | Error handling, parallel execution, monitoring | Optional |