skills/playwright-dev/webkit-safari-version.md

Updating WebKit Safari Version

The Safari version string used in the WebKit user-agent is declared in one place:

packages/playwright-core/src/server/webkit/wkBrowser.ts — BROWSER_VERSION constant (line ~35).

const BROWSER_VERSION = '26.4';
const DEFAULT_USER_AGENT = `Mozilla/5.0 ... Version/${BROWSER_VERSION} Safari/605.1.15`;

Steps to update

1. Find the latest stable Safari version — search site:developer.apple.com "Safari X.Y Release Notes" or check the Safari Release Notes index. The highest numbered entry that is not a Technology Preview is the current stable release.

2. Update BROWSER_VERSION in wkBrowser.ts.

3. Run lint to update any generated files that embed the version:

   npm run flint