Run the project's Playwright tests: stats plus each failure's file:line, kind and message. Diagnoses missing installs, dead dev servers, syntax errors, crashes and timeouts (kills the tree, keeps partial results). Reports progress; background: true returns a run id for long suites. Runs are recorded for analyze-history.

Progress (tests done/total, failures so far) or the final result of a run-test background run; the result becomes the last run for get-failure. waitSeconds waits; cancel stops it. Default: the latest run.

Analyze one failure from the most recent run-test execution: full message and code frame, expected vs actual, stack trace, failed network requests (4xx/5xx and dead endpoints), console errors, failure kind (assertion/timeout/browser-crash/syntax/config/server-unreachable) and concrete next steps. Use run-test first.

Patch a failure from the last run: a drifted locator is matched against the DOM at failure (trace, or live url) and replaced with one proven unique; changed copy gets the new expected text. Returns a diff and confidence; apply: true writes it, re-runs the test and reverts if still red. Refuses when the element is truly missing (app bug).

Open a URL headlessly and return its elements with Playwright locators proven unique on the page (role + name first), CSS selectors, visibility, text and console messages. storageState/headers open it signed in; actions click/fill first to reach a state. view 'locators' is the compact map.

List the Playwright tests available in the project (file, line, full title, projects), with optional filtering. Uses playwright test --list when Playwright works and falls back to a source scan when the install or config is broken, reporting why.

Check a CSS selector, Playwright selector or locator (getByRole/getByTestId…, .first(), .filter()) on a live page: validity, match count (actions need exactly 1), sample matches and a sturdier verified locator for each. Accepts storageState/headers/actions.

Scaffold a Playwright test from a description using the project's REAL selectors. Scans the agent's recent file changes (git working tree / last commit, mtime fallback), extracts data-testid / role / label / placeholder / id locators with their source locations, optionally cross-checks them against the live page, writes a ready-to-run spec, and returns next steps.

Visual regression check: screenshot a live page (or element), compare it to a stored baseline, and report how many pixels changed, WHERE they changed (bounding regions), and the average color shift ("blue → red"). First call saves the baseline; later calls compare. Writes a red-highlighted diff image for review.

Repeat failing tests with retries disabled and return a per-test, evidence-based verdict: CONSISTENTLY FAILING (real bug), FLAKY (pass/fail counts, error-signature variance, duration spread) or NOT REPRODUCING. Runs all repetitions in one process by default. isolate: true also re-runs the failures with one worker to tell parallelism bugs (shared state) from flakiness inside the test. Defaults to the tests that failed in the most recent run.

Analyze the local run history (.playwright-e2e-mcp/history.jsonl, written by every run): 'flaky' ranks tests that flip pass/fail and lists broken or regressed ones; 'patterns' groups failures by cause; 'test' shows one test's timeline.