Designs, reviews, and configures a quality gate in a CI/CD pipeline — what should actually block a merge and a deploy (lint/format/types, unit+integration tests, coverage threshold on the diff, static analysis/SAST, dependencies/SCA, secret-scan, E2E/smoke, migrations, IaC scan), verifying that the gate really fails the build and does not just warn, that feedback is fast and fail-fast, that flaky tests do not block falsely, and that the pipeline itself is secure (script injection, pinned action versions, minimal token permissions).
