Frontend design skill for AI coding agents with 24 commands, live browser iteration and a CLI that flags common AI-generated design mistakes.
Free tool inAgent skills and plugins
Impeccable at a glance
Checked 18 Oct 2026Impeccable is one agent skill with 24 commands (init, audit, critique, polish, typeset, layout and more) that steers coding agents away from generic AI-looking frontends, plus edit hooks for Claude Code, Codex, Cursor, Copilot and Grok Build. Its detector (59 rules) also runs as a standalone CLI with no LLM or API key; the skill itself needs a coding agent with a paid plan or key. Apache-2.0. New designs call an impeccable.style API, with anonymous telemetry that can be turned off. Free add-on; it does not replace a paid product.
RepoQuarry. “Impeccable.” Checked 18 Oct 2026. https://repoquarry.dev/projects/impeccableWhat it replaces
Nothing people pay for: it’s a free tool, listed because people search for it. Find similar projects in Agent skills and plugins.
Facts, with sources
Every answer links to where we found it. We read the documentation; we did not install it.
The CLI and browser extension run the deterministic rules with no LLM and no API key.github.com · impeccable#readme ↗ 3d ago
Apache License Version 2.0, January 2004github.com · LICENSE ↗ 3d ago
each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproducegithub.com · LICENSE ↗ 3d ago
Impeccable includes a standalone CLI for detecting anti-patterns without an AI harness.github.com · impeccable#readme ↗ 3d ago
plus impeccable.cmd for Windows) that runs the Impeccable engine, a self-contained binarygithub.com · impeccable#installation ↗ 3d ago
then run /impeccable init inside your AI coding toolgithub.com · impeccable#readme ↗ 3d ago
No licence changes since we started watching. Licence watch: follow Impeccable and we email you if its licence terms change.
Growth and activity in detail
Is it popular, and is anyone still working on it? From GitHub.
- Actively maintained56 people committing, active 12 of the last 12 weeks.
56 people committing in the last 12 months · 139 pull requests merged in 30 days · 83 issues opened, 76 closed in 30 days
Stars over time
Building history+1,285 stars since 18 Oct 2026. The 7-day comparison and the trend label start once there is a full week of daily counts.
- Impeccable
Tracked daily since 18 Oct 2026. Dashed history: estimated from public records of when people starred the repo. Lines connect observations only; gaps contain no measured points.
Commits per week, last 52 weeks
active 12 of the last 12 weeksUp 28% on the 12 weeks before.
Where these numbers come from
- Stars, forks, releases: GitHub's public API, fetched every night (last fetch today).
- Star history: counted every night since 18 Oct 2026.
- Commits and people committing: GitHub's repository statistics, counted weekly. Names are never stored.
- Pull requests and issues: counted from GitHub for the last 30 days.
- Stars show popularity, not quality. The facts below are checked separately, by reading the project's own documentation. How we check.