Testing & QA

Generate Dart test mocks with mockito and build_runner for external services

Move Dart tests from matcher expect calls to the checks package

Add Flutter integration tests that drive the app through user flows

Write Flutter widget tests for rendering, taps and text input

Record, edit and replay reusable end-to-end test YAML files for mobile apps

Write repeatable QA regression tests from tickets and acceptance criteria

Compare app screenshots to catch visual regressions in layout, color and text

Test iOS and Android app UI flows with repeated interact, screenshot and verify steps

Update formal verification models after code changes and flag real bugs

Audit and refresh the verification skill for a project so it matches the code

Trace each bug to the first place the system went wrong and fix it there

Verify a finished task against the real artifact before declaring it done

Write tests that assert user-visible behavior instead of internal details

Reproduce Slack bug reports and open a draft fix PR after before and after proof

Trace why code works the way it does using history, tickets and logs

Set up design QA gates with token lint, axe accessibility and visual regression

Run the one-command design quality gate and report the real pass count

Check acceptance criteria in a live browser or recording with PASS or FAIL results

Turn a user-reported bug into a clear GitHub issue without file paths

Generate functional, edge case and error test cases from a PRD or requirements

Debug blank canvases, loading bugs and draw-call costs in Three.js browser games

Run playtests, bot QA, bundle checks and release reports for Three.js games

Generate test plans, manual test cases, regression suites and bug reports

Triage Java heap dumps and MAT reports to find memory leaks and OOM causes

Write JUnit 5 and MockK unit tests with mocks, exception checks and TDD flows

Safely change untested legacy code using seams and characterization tests

Install and configure TDD Guard for a project with the right test reporter

Verify finished work by re-running its claimed checks and flagging weakened tests

Verify WordPress Abilities API registrations match their read-only and permission claims

Configure and fix PHPStan static analysis for WordPress plugins and themes

Convert promptfoo, pytest or Jest test suites into an MCPJam eval file

Launch MCPJam hosted evals, poll them to a verdict and triage failing steps

Check that work is really done before claiming it is fixed or passing

Find the root cause of a bug before proposing any fix

Write a failing test first, then the smallest code that makes it pass

Find and fix bugs with root cause analysis, defense-in-depth checks and verification

Validate data at every layer so bugs cannot slip through to later code

Trace bugs backward through the call stack to find the original trigger

Investigate root causes in four phases before attempting any bug fix

Run verification commands and confirm their output before claiming success

Test web apps with Playwright, Vitest and k6 across E2E, load, visual and a11y

Dump a window's UI element tree to debug automation and find element names

Pull session logs with command details and errors to debug a failed step

Work through a bug or test failure systematically before proposing any fix

Write failing tests first and then the minimal code that passes them

Test local web apps with Playwright, checking UI behavior, logs and screenshots

Set up GoogleTest and CTest, fix flaky C++ tests and add sanitizer checks

Test Django and DRF APIs with pytest-django, factory_boy and TDD workflows

Run Django migrations, lint, tests and security scans before each release