- STANDARDS.md: add non-negotiable rule that Playwright/Cypress/Puppeteer must always run headless to prevent display collision with the user - QA-TESTING.md: add Browser Automation section with per-tool headless configuration guidance - README.md: update to reflect the TypeScript wizard (mosaic init modes, --non-interactive flags, wizard development section, dist/ in tree) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>