CI Pipeline and Burn-In Strategy

Stage jobs: install/caching once, run test-changed for quick feedback, then shard full suites with fail-fast: false so evidence isn’t lost.
Re-run changed specs 5–10x (burn-in) before merging to flush flakes; fail the pipeline on the first inconsistent run.
Upload artifacts on failure (videos, traces, HAR) and keep retry counts explicit—hidden retries hide instability.
Use wait-on for app startup, enforce time budgets (<10 min per job), and document required secrets alongside workflows.
Mirror CI scripts locally (npm run test:ci, scripts/burn-in-changed.sh) so devs reproduce pipeline behaviour exactly.

Source: Murat CI/CD strategy blog, Playwright/Cypress workflow examples.