$ npx playwright test --project=gary-parker
- playwright-smart-reporter110,898 downloads/mo · 90 stars
- playwright-affected627 downloads/mo · 6 stars
- playwright-shard-balancer538 downloads/mo
- tracescrub512 downloads/mo
- playwright-release-notes-examples36 stars
5 passed112,575npm downloads/mo · 132 stars
Gary Parker
Quality engineering for teams shipping with AI: I build open-source Playwright tooling and write up experiments with measured results.
writing
view all →- ARIA Snapshots: The Assertion Layer Your Locators Are MissingFour suites, three rounds of UI drift, five invisible accessibility regressions. The suite that survived best noticed least — and ARIA snapshots were the only assertions that caught everything.
- Self-Healing Tests: What the Vendors Aren't Telling YouI broke a test suite twice and let Playwright's healer agent fix it. It repaired everything, fast and correctly — and that's exactly the problem with the sales pitch.
- Your AI's Tests Pass. Here's What They Don't CheckAn agent wrote a module and its own tests: 100% line coverage, 90.67% mutation score. What the seven surviving mutants reveal about verifying AI-written code.
- Hands-On with Playwright Test Agents: Planner, Generator, Healer — MeasuredPlaywright's official test agents evaluated properly: generated suite quality vs a baseline, the 43-minute agentic tax, and why the healer should never run unsupervised.
- The 80/20 of Test AutomationMost teams automate the wrong 80%. Here's how to focus on the tests that actually catch production bugs.
experiments
- poc-playwright-test-agentsMeasured evaluation of Playwright Test Agents (planner/generator/healer) against a one-pass baseline suite.
- poc-ai-code-test-coverageAn agent's own tests reached 100% line coverage and a 90.67% mutation score.
- poc-self-healing-selectorsOver two drift releases the healer made 14 repairs on a CSS-selector suite, 2 on ARIA, 1 on test IDs.
- poc-aria-snapshot-assertionsTest-ID assertions caught 0 of 5 seeded accessibility regressions; ARIA snapshots caught 5 of 5.
newsletter
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