Phase 2 lesson from F2-3 (n8n install Playwright flake on net::ERR_NETWORK_CHANGED): every
install overlay that does page.goto needs the same try/except PlaywrightError + status retry.
Centralize in runner/harness/browser.py::goto_with_retry; apply to ALL install overlays.
- runner/harness/browser.py: shared helper. Polls page.goto until status in accept_statuses;
catches PlaywrightError (net::ERR_*) as a retryable signal, not a failure. Raises AssertionError
with last_status + last_err diagnostic only on deadline expiry.
- tests/custom-html/test_install.py: now uses goto_with_retry (200 only, wait_until=load).
- tests/custom-html/playwright/test_browser_smoke.py: same.
- tests/n8n/test_install.py: replaced inline retry loop with goto_with_retry (200, 304).
- tests/keycloak/test_install.py: goto_with_retry for admin console (200, 302, 303; 45s goto).
- tests/cryptpad/test_install.py: goto_with_retry (200, 304; 60s goto, wait_until=load).
- tests/lasuite-docs/test_install.py: goto_with_retry (200, 301, 302; 60s goto).
Cold-verifiable: ssh cc-ci 'RECIPE=custom-html cc-ci-run runner/run_recipe_ci.py'
all 5 stages PASS (including the install overlay that flaked in the deps_smoke run),
deploy-count=1, head_ref=8a026066==chaos-version=8a026066 (HC1 non-vacuous).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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