// Track

Quality Engineering Mastery

Ship Code That Actually Works

The testing discipline that let us fix 100 bugs across 11 projects overnight — autonomously. Quality gates, E2E testing, Playwright as development eyes, multi-agent code audits, visual QA retros, and the delivery checklist that separates shipped from broken.

Recommended: Complete Discipline first

6 lessons~65 min total

Lessons are shown in recommended order. Complete them in sequence for the best experience — or jump to any lesson.

Lesson 138·10 min read

The Quality Gate Mental Model: Why Most AI-Built Code Breaks

Coverage numbers lie. AI reviewers have blind spots. The gap between 'tests pass' and 'it works in production' is where systems die. This is the mental shift from shipping fast to shipping with confidence.

Lesson 139·11 min read

Test Strategy First: Writing the Plan Before the Code

The build order that prevents quality debt: PRD, UX audit, test strategy, build, Playwright. Write the testing plan before you write the first line of code — or pay for it later.

Lesson 140·11 min read

E2E Testing: Playwright as Your Development Eyes

Mocks lie. The urljoin incident proved it. Playwright is not a post-deployment QA tool — it is your development eyes, catching what code review and unit tests structurally cannot see.

Lesson 141·11 min read

Code Audits: Multi-Agent Review That Actually Works

One reviewer has blind spots. Three specialized agents — backend, devops, architect — running in parallel catch bugs no single reviewer would find. The audit swarm pattern and the discipline that makes it work.

Lesson 142·10 min read

Visual QA and UI Retros: Seeing What Code Review Can't

Code review reads code. It does not see UI. A visual retro with Playwright screenshots at three breakpoints catches the rendering bugs, layout shifts, and interaction failures that no amount of code review will ever find.

Lesson 143·12 min read

The Delivery Checklist: From Merged PR to Running System

A merged PR is not a delivery. A running system is. The full quality gate, the compound learning retro, and the operational discipline that separates shipping from done.