Builds a unified release-readiness gate that aggregates verdicts from any combination of k6 / JMeter / Gatling / Locust load runners and Lighthouse CI Web Vitals, applies severity-aware pass/fail thresholds, and emits a single go / no-go decision with per-metric deltas vs the main-branch baseline. Posts the delta as a PR comment when the team has the integration set up. Use when authoring a CI step that gates a deployment on cross-runner perf compatibility.