Extreme Programming (XP) Practices

<default_to_action> When applying XP practices:

1. START with practices that give immediate value
2. BUILD supporting practices gradually
3. ADAPT to your context
4. MEASURE results

Core XP Practices (Prioritized):

Practice	Start Here	Why First
TDD	✅ Yes	Foundation for everything
Continuous Integration	✅ Yes	Fast feedback
Pair Programming	✅ Yes	Knowledge sharing
Collective Ownership	After CI+TDD	Needs safety net
Small Releases	After CI	Infrastructure dependent

Pairing Quick Start:

Driver-Navigator (Classic):
- Driver: Writes code
- Navigator: Reviews, thinks ahead
- Rotate every 20-30 min

Ping-Pong (with TDD):
A: Write failing test
B: Make test pass + refactor
B: Write next failing test
A: Make test pass + refactor

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Quick Reference Card

When to Pair

Context	Pair?	Why
Complex/risky code	✅ Always	Needs multiple perspectives
New technology	✅ Always	Learning accelerator
Onboarding	✅ Always	Knowledge transfer
Critical bugs	✅ Always	Two heads better
Simple tasks	❌ Skip	Not worth overhead
Research spikes	❌ Skip	Pair to discuss findings

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Agent Integration

// Agent-human pair testing
const charter = "Test payment edge cases";
const tests = await Task("Generate Tests", { charter }, "qe-test-generator");
const reviewed = await human.review(tests);
await Task("Implement", { tests: reviewed }, "qe-test-generator");

// Continuous integration with agents
await Task("Risk Analysis", { prDiff }, "qe-regression-risk-analyzer");
await Task("Generate Tests", { changes: prDiff }, "qe-test-generator");
await Task("Execute Tests", { scope: 'affected' }, "qe-test-executor");