Audit of every user-facing surface that enumerates supported harnesses found GitHub Copilot missing or buried in several. Bring it to parity with Claude Code, Codex, Cursor, and Gemini. Missing -> added: - site/content/reference/hooks.md: the public /docs/hooks page (tagline, the post-edit list, and the manifest table) now covers GitHub Copilot, including the `.github/hooks/impeccable.json` surface and the default-branch/trust note. (Only skill/reference/hooks.md was updated in the feature PR; this is the website doc.) - README.md Design hook section + the manifest surface list. - site/content/tutorials/getting-started.md hook note. - site/pages/faq.astro tool-specific setup list and the docs-links list. - PRODUCT.md audience line and README.npm.md suite description. Prominence + naming: - README "Supported Tools" and the homepage hero logo row: move GitHub Copilot up to third (after Claude Code) instead of trailing. - site/pages/designing: list GitHub Copilot earlier, full name. - README "Supported Tools": the harness link now points at GitHub Copilot (github.com/features/copilot) instead of the unrelated VS Code entry. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2.7 KiB
Impeccable CLI
Detect UI anti-patterns and design quality issues from the command line. Scans HTML, CSS, JSX, TSX, Vue, and Svelte files for 44 deterministic rules, including AI-generated UI tells, accessibility violations, and general design quality problems.
Quick Start
# Install skills into your AI harness (Claude, Cursor, Gemini, etc.)
npx impeccable skills install
# Non-interactive install for a specific scope
npx impeccable skills install -y --providers=claude,codex --scope=project
# First command to run inside your AI harness
/impeccable init
# Update skills to the latest version
npx impeccable skills update
# Install or update skills without hook manifests
npx impeccable skills install --no-hooks
# Link skills from a Git submodule checkout
npx impeccable skills link --source=.impeccable --providers=claude,cursor
# List all available commands
npx impeccable skills help
# Scan files or directories for anti-patterns
npx impeccable detect src/
# Scan a live URL (requires Puppeteer)
npx impeccable detect https://example.com
# JSON output for CI/tooling
npx impeccable detect --json src/
# Deprecated compatibility flag; full scan still runs
npx impeccable detect --fast src/
What It Detects
AI Slop Tells: patterns that scream "AI generated this":
- Side-tab accent borders, gradient text on headings
- Purple/violet gradients and cyan-on-dark palettes
- Dark mode with glowing accents, border + border-radius clashes
Typography Issues: overused fonts (Inter, Roboto), flat type hierarchy, single font families
Color & Contrast: WCAG AA violations, gray text on colored backgrounds, pure black/white
Layout & Composition: nested cards, monotonous spacing, everything-centered layouts
Motion: bounce/elastic easing, layout property transitions
Quality: tiny body text, cramped padding, long line lengths, small touch targets
44 deterministic detector rules in total. See the full catalog at impeccable.style/slop.
Exit Codes
0: no issues found2: anti-patterns detected
Options
impeccable detect [options] [file-or-dir-or-url...]
--fast Regex-only mode (skip jsdom, faster but less accurate)
--json Output findings as JSON
--help Show help
Requirements
- Node.js 24+
jsdom(included as dependency, used for HTML scanning)puppeteer(optional, only needed for URL scanning)
Part of Impeccable
This CLI is part of Impeccable, a cross-provider design skill pack for AI-powered development tools. The full suite includes 23 commands for Claude, Cursor, GitHub Copilot, Gemini, Codex, and more.