skills vs impeccable
Two of the top projects in Skills, plugins and rules, side by side: who leads on each score part and who each one suits, then setup, license, activity and what each review found.
skills
Agent skills for planning, TDD, debugging and code review
impeccable
Design skill with 24 commands and a detector for AI-generated frontends
Verdict
skills ranks higher, 94 to 93. Of the 4 score parts we measure for both, skills leads on 1, impeccable on 2 and 1 is even.
- Adoptionskills leads by 12 points, 99 to 87.
- FreshnessEven at 100.
- Maintenanceimpeccable leads by 1 point, 93 to 92: close to even.
- Agent-readyimpeccable leads by 15 points, 85 to 70: a wide gap.
Pick skills if you are
Engineers using Claude Code, Codex, Copilot or Gemini CLI on real codebases
- Small, composable skills that can be edited; README says they work with any model
- Plugin install for Claude Code, Codex and Copilot, with automatic updates
Pick impeccable if you are
Developers using AI coding agents who want better frontend design output
- Supports many harnesses: Claude Code, Cursor, Codex, Gemini CLI, Copilot, Grok Build, Hermes
- 59 deterministic detector rules run without an LLM or API key
| What we compare | skills | impeccable |
|---|---|---|
| Score parts, out of 100 | ||
| Adoption | 99, widely used | 87, widely used |
| Freshness | 100, active | 100, active |
| Maintenance | 92, healthy | 93, healthy |
| Easy to run | Not scored for this kind | Not scored for this kind |
| Agent-ready | 70, partly | 85, ready |
| Facts from GitHub and the README | ||
| Stars | 291.3k | 81.2k |
| License | MIT (permissive) | Apache-2.0 (permissive) |
| Last commit | Oct 2026 | Oct 2026 |
| Last release | Oct 2026 | Oct 2026 |
| Language | Shell | JavaScript |
| Docker | No | No |
| GPU | Not needed | Not needed |
| arm64 or Apple Silicon | Not stated | Not stated |
skills
A collection of Markdown skill files for coding agents, split into engineering and productivity groups. It covers grilling sessions that build a project glossary and ADRs, spec and ticket generation, red-green-refactor TDD, a bug diagnosis loop, and diff review. Installs as a plugin for Claude Code, Codex and GitHub Copilot, via gemini skills install for Gemini CLI, or as editable files through npx skills.
Who it is for: Engineers using Claude Code, Codex, Copilot or Gemini CLI on real codebases
Strengths
- Small, composable skills that can be edited; README says they work with any model
- Plugin install for Claude Code, Codex and Copilot, with automatic updates
- Setup skill configures issue tracker (GitHub, GitLab, local files), triage labels and doc locations
- Separates user-invoked orchestration skills from model-invoked discipline skills
Weaknesses
- Manual updates for Gemini CLI and npx installs
- Installing both plugin and npx copies gives every skill twice
- Must run /setup-matt-pocock-skills once per repo before the engineering skills
- Architecture skill is a survey only and will not untangle an old codebase
- no GPU
- Needs Issue tracker (GitHub, GitLab or local files)
- Models: Any model (per README)
impeccable
Impeccable installs a single /impeccable skill into AI coding tools, with 24 commands such as audit, critique, polish, typeset and live browser variant iteration. It writes PRODUCT.md and DESIGN.md for project context, and ships 59 deterministic detector rules that run in a CLI and browser extension without an LLM or API key. Hooks flag common AI design tells on UI file edits in supported harnesses.
Who it is for: Developers using AI coding agents who want better frontend design output
Strengths
- Supports many harnesses: Claude Code, Cursor, Codex, Gemini CLI, Copilot, Grok Build, Hermes
- 59 deterministic detector rules run without an LLM or API key
- Edit hooks surface design findings; Cursor blocks bad writes before they land
- Several install paths: npx installer, Git submodule, plugin marketplace, manual copy
Weaknesses
- Native edit hooks are not available on every harness; Hermes and Veto get none
- Roll API at impeccable.style is called when a new design starts; telemetry is opt-out
- Downloads an engine binary into ~/.impeccable/bin/ on first run if not bundled
- Codex and Grok Build need manual hook or folder trust approval after install
- no GPU
- Needs Node.js (only for npx installer), impeccable.style roll API
- Models: Claude Code, Cursor, Codex CLI, Gemini CLI, GitHub Copilot
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