Debugging Playwright CDP Sessions That Lose Cookies and Proxy Context
I started treating this as a separate bug class after seeing the same failure pattern repeat: A human opens a browser profile and is logged in. A Play…
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Testing a LiveView App with Playwright: Fixing Navigation Timeouts
I was building a Playwright suite against a Phoenix LiveView app for the first time. Tests ran fine in isolation. Overnight, the full suite timed out …
Playwright MCP vs Rendershot MCP: choosing a browser MCP server in 2026
The first time someone asked me "Rendershot has an MCP server, but doesn't Microsoft's Playwright MCP do the same thing?" I gave a bad answer. I mutte…
Why green CI doesn't mean your system works
A case study: how a TypeScript migration doubled my test runs — with zero failures CI was green. Tests were passing. PRs were merging. The system was …
Stop Letting AI Guess Your Playwright Tests: Use Context7 MCP
The problem While working on my Swiftcart QA automation project, I asked my AI agent a simple question: “What’s your knowledge cutoff date?” It answer…
I Cut My AI Test Automation Cost by 300x by Ditching Vision Models
I Cut My AI Test Automation Cost by 300x by Ditching Vision Models From $0.011 per step to $0.00004 — here's how I learned vision models are overkill …
5 распространенных ошибок новичка в E2E-тестах
Начинаете писать E2E-тесты? Думаете, нужно просто открыть страницу, нажать кнопку и написать expect? Разберем на примере Playwright, почему отчёт може…
My Browser Test Passed. The User Was Never Logged In.
That single moment changed how I think about browser automation entirely. When I started building browser automation tooling around Playwright, I expe…
How We Halved Our Playwright E2E Suite
Five patterns that took a slow, flaky Playwright suite down to fast and stable. We had a Playwright E2E suite that had grown into a painful, flaky par…
Designing an Account Context Manifest for AI Browser Agents
Your AI browser agent can open a page. It can click buttons. It can fill forms. It can even complete a workflow that looks correct from the outside. B…
Six Principles in Practice: How an Agentic E2E Found 11 Production Bugs in 8 Runs
Eight runs, eleven bugs I ran my E2E testing system on a production ecommerce platform eight times in a row – across five different business modules, …
Playwright Basics: Your First Test with Page, Test Structure, and Codegen
If you are starting with Playwright, the first real hurdle is not syntax. It is understanding three things clearly: what the page object actually repr…
Getting Started with Playwright E2E Testing
Modern web applications need more than unit tests. You also need to test real user flows such as: Login Checkout Form submissions Navigation This is w…
The itgps-agent: Bringing Studio-Managed Configs to Your Local Workflow
The itgps-agent: Bringing Studio-Managed Configs to Your Local Workflow In Part 1 and Part 2 , we explored ITG Playwright Studio's web interface for m…
A Visual Tour of ITG Playwright Studio: Managing Tests Through a Web Interface
A Visual Tour of ITG Playwright Studio In Part 1 , we discussed why managing Playwright tests at scale is challenging and introduced ITG Playwright St…
Playwright is Powerful, But Managing It at Scale? That's Another Story
Playwright is Powerful, But Managing It at Scale? That's Another Story If you've worked with Playwright, you know it's an incredible tool for end-to-e…
"Persisting your real Chrome login across Playwright restarts on macOS"
Every macOS reboot, the same ritual. Open the Playwright-controlled Chrome window, see seven publishing tabs all logged out, and spend the next ten mi…
Как я перестал бояться и полюбил MCP или Зачем я написал 4 MCP‑сервера и протокол для их связи
Привет! Вы знаете как это бывает — начинаешь делать одну штуку, а потом просыпаешься через неделю и понимаешь, что написал че…
How I Built a Screenshot API That Doesn't Suck
How I Built a Screenshot API That Developers Can Actually Trust After spending too many nights babysitting headless Chrome, I stopped trying to make a…
Solving Substack TipTap CDP Publish (When Lexical Will Not Work)
TL;DR : After bashing my head against Reddit / IH / Twitter Lexical anti-bot for 2 hours, I tried the same approach on Substack and it just worked. Ti…
Bug fingerprinting для UI: почему stack trace не работает и что вместо
TL;DR: Sentry дедуплицирует backend-ошибки по хешу (error class + top stack frame + module) . Для UI-багов этот рецепт ломается — у expect(button).toB…
50% Compliance, Not 0%: How a Logging Spike Almost Triggered the Wrong Architecture Rewrite
TL;DR : I thought my prompt augmentation track was completely broken (compliance=0%) and almost spent 27 hours rewriting plan-and-execute. Turns out t…
`@playwright/cli` Is Not `npx playwright test` — And That Difference Is Costing Your AI Agent Thousands of Tokens
As an SDET or Automation Engineer, failing tests are part of the daily grind. With the rise of Agentic AI, fixing scripts is easier than ever—but ther…
The smoke tests that never got automated
I've been a frontend dev for a few years now, and there's a pattern I kept seeing across almost every small team I worked with. New feature ships. Eve…
Two test runtimes, two coverage reports, one fragile merge
You have unit tests in Vitest (or Jest). You have E2E tests in Playwright. CI runs both. Coverage works for each, until you try to look at a single nu…
Playwright MCP burns 1.5M tokens. CLI does it in 27k. So I built the skill that splits the phases.
I wanted to test my web app. That's it. A Next.js portfolio and a SaaS chat — run some accessibility checks, catch console errors, verify nothing's br…
Хотел протестировать веб-приложение через AI — за три дня собрал свой инструмент
Задача была простая: протестировать два веб-приложения перед деплоем. Next.js-портфолио и SaaS-чат — accessibility, консольные ошибки, отзывчивость на…