The switch is stamped on the session row, not held in the tab. Every authenticated spec opens its context from the same storageState file, so the sharing journey switching that jar into the owner's record switched it for whatever spec happened to be mid-navigation on the other worker. The failures land nowhere near the cause: /settings/ai painting "Not part of shared access" instead of the AI panel, an axe scan reading a banner its spec never asked for, a waitForResponse waiting on a request the refused surface never sends. Which spec loses depends on scheduling, which is why it moved between runs. Log the delegate in a second time and hand that jar to the journey. Same account, its own session row, no reach outside the file. The three login captures collapse into one helper while the third one is added, and the fixture's login-bucket reset already covers the extra attempt. The guard matches the two things a switching spec cannot avoid naming, the switcher entry it clicks and the endpoint that entry calls, and checks both that the match set is non-empty and that the shared jar is still what the ordinary specs read. Verified red by pointing the journey back at the shared jar.
e2e/
End-to-end browser tests. Playwright 1.60 drives a production build of the app against a real PostgreSQL, with @axe-core/playwright for accessibility assertions. This is the heaviest test tier; CI runs it on every PR, and locally it is worth running when a change touches a UI flow.
Running
pnpm e2e
The Playwright config (../playwright.config.ts) builds the app (next build) and brings up Postgres before the specs run; setup/global-setup.ts seeds the auth + fixture state. The suite is not part of the fast local gate (typecheck / lint / test) — it surfaces at PR CI, so expect responsive/wizard/nav reworks to flag here first.
Layout
setup/—test.ts(the suite'stest+expectentry point),global-setup.ts(auth + DB seeding),test-helpers.ts(shared login + navigation helpers).utils/— fixtures such asmock-dashboard-snapshot.ts.*.spec.ts— one spec per flow: auth/login/redirect, dashboard, charts, the medication-wizard cadences (medications-wizard-*), insights generation + scroll restoration, doctor report, settings, mobile-viewport consistency, locale switch, accessibility (a11y.spec.ts), and thev1427-*regression set.
Conventions
Import test and expect from ./setup/test, never from @playwright/test — types (Page, Route, …) still come from the package. The entry point extends Playwright's test with an automatic fixture that drops route handlers and page listeners after every test, so a handler left in flight cannot fail the test it belonged to once the context closes. src/__tests__/e2e-route-cleanup-guard.test.ts enforces the import boundary.
Assert against stable data-* attributes (data-slot, data-display-step, root display attrs), not viewport-dependent visible text. Responsive sm:hidden UI changes break getByText on desktop while the underlying element is still present — anchoring on data attributes keeps the specs stable across breakpoints. See ../CLAUDE.md.