zerg-e2elisted

# Zerg E2E Guardrails ## Principles - Correctness first, then speed. - Avoid silent success: helpers must fail loudly. - Wait on conditions, not sleeps. ## Typical Fixes - Selector drift → add `data-testid` in React. - Readiness waits → wait for network response, not optimistic UI. - Shared state → isolate data per test/worker. ## Common Commands ```bash make test-e2e-core make test-e2e make test-e2e-single TEST=tests/<spec>.ts make test-e2e-errors ```