# L2b: Context-Aware Agent

**Module**: M2 Architecture  
**Files**: starter.py, solution.py

## Objective

Implement sliding window + summarization for long agent sessions.

## Concepts

Refer to the corresponding module for full concept explanations.

## Starter

```bash
cd course/labs/l2-context/
# Open starter file and fill in the TODOs
```

## Checkpoints

1. Build a ContextManager class
2. Implement max_recent_turns sliding window
3. Summarize old messages when window exceeds limit
4. Build context from summary + recent messages

## Solution

Compare against the solution file after attempting the starter.