# L4a: Agent Chain

**Module**: M4 Orchestration  
**Files**: starter.yaml, solution.yaml

## Objective

Create a YAML-defined plan-build-review-verify pipeline.

## Concepts

Refer to the corresponding module for full concept explanations.

## Starter

```bash
cd course/labs/l4-agent-chain/
# Open starter file and fill in the TODOs
```

## Checkpoints

1. Define planner step with output format requirements
2. Define builder step with implementation rules
3. Define reviewer step with checklist criteria
4. Define verifier step with confidence reporting

## Solution

Compare against the solution file after attempting the starter.