Claude Claude Code configuration reference. Claude Code configuration reference. Resources CLAUDE.md : Project-specific instructionsCLAUDE.md : CLAUDE.md at /CLAUDE.mdSkills : Skill packagesheadless-browser : Browser automation with two efficiency tiers. Tier 1: headless-check.js for quick health checks, screenshots, error detection (JSON output). Tier 2: Playwright CLI (@playwright/cli via npx) for intera...verify-ui : Verify CSS/UI changes match what the user asked for. Uses deterministic computed style checks to avoid LLM confirmation bias. Use when: (1) After CSS or layout changes the user asks to verify, (2) Use...verify-ui-ai : AI-based visual confirmation that a problem is resolved — Level 6 (final-resort) testing. Use ONLY when /verify-ui (mechanical computed-styles or screenshot pixel-diff) cannot reach the assertion AND ... Next CLAUDE.md