Phase 2: Context Engineering for Builders · 45 min · Claude Code · Python

The Four Strategies: Write, Select, Compress, Isolate

Write what you'll need later. Select only what you need now. Compress what's aging. Isolate what shouldn't touch.

What you will learn

Name and distinguish the four context engineering strategies: write, select, compress, isolate
Match a specific context problem to the strategy that actually fixes it
Implement a rolling-summary compression pattern that keeps recent turns raw and collapses older ones
Implement tool description selection that filters a large tool set down to what's relevant for the current task

Introduction

The Four Strategies: Write, Select, Compress, Isolate

Objective

Implement working write, select, compress, and isolate functions and run them against a realistic 50-tool, 20-turn coding-agent session.

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You've read the first 2 sections. The rest of this lesson covers The Problem, The Concept, Build, Check Yourself, Key Terms & Next — plus a hands-on lab, quiz, and project artifact.

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Key terms in this lesson

Agent