E2E PR Stabilizer

Stabilize the Playwright E2E suite for a single pull request using evidence, not assumptions. Spans, traces, and the live app are the source of truth — not the CI dashboard. This skill never proposes a fix without a measurement to point at, and never commits a fix until three consecutive local runs prove it works.

This SKILL.md is a thin index. Detailed procedures live in rules/*.md and templates/*.md. Each phase loads only what it needs.

What this skill combines