ClaudSkills / Product / design-system-ui

Improve Code Quality

Q: What is a Claude Code skill and how does the Improve Code Quality skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Improve Code Quality is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Product · Sub-category: design-system-ui · Last updated: 2026-07-22

Guided journey from a working-but-untested vibe-coded prototype to a production-ready product with tests, clean structure, a business-rules boundary, and resilience at scale. Orchestrates nine skills phase by phase - working-with-legacy-code, clean-code, refactoring-patterns, software-design-philosophy, clean-architecture, pragmatic-programmer, release-it, system-design, ddia-systems - asking the user questions at every decision point and recording results in the project docs/ folder (TESTING.md, TECH-DEBT.md, RELIABILITY.md, IMPROVE-CODE-QUALITY-PLAN.md) so the journey resumes across sessions. Use when the user wants to harden an AI-generated prototype, add tests before refactoring, make code safe to change, or says ''this works on my machine but I am scared to touch it''. For a large aged codebase, use remove-technical-debt; to decide structure before building, use design-code-architecture; for a product and UX pass, use improve-app. For one framework in isolation, invoke that skill directly.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Turn a working-but-untested vibe-coded prototype into a product you can ship and operate. This is an interactive, resumable journey of nine phases: the agent asks before every decision and records the outcome in your project's docs/ folder, so you can stop after any phase and pick up later. A week-old prototype is already legacy code — so the first move is a safety net, and every phase after it is verifiable because of that net.

What this skill does

Improve Code Quality is a community-contributed Claude Code skill in the design-system-ui sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/improve-code-quality/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user wants to harden an AI-generated prototype, add tests before refactoring, make code safe to change, or says ''this works on my machine but I am scared to touch it''. For a large aged codebase, use remove-technical-debt; to decide structure before building, use design-code-architecture; for a product and UX pass, use improve-app.

Who uses this skill

The Improve Code Quality Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 157,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/improve-code-quality
curl -L https://claudskills.com/skills/improve-code-quality/SKILL.md \
  -o ~/.claude/skills/improve-code-quality/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/improve-code-quality/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/improve-code-quality/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\improve-code-quality\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Improve Code Quality Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/improve-code-quality/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Improve Code Quality skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Improve Code Quality skill?

Use Improve Code Quality when your Claude Code task falls under the Product category — specifically in the design system ui area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Improve Code Quality" or describe the task and let Claude pick). Browse related skills at /category/product/.

What is a Claude Code skill and how does the Improve Code Quality skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Improve Code Quality is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/wondelai/skills/blob/HEAD/improve-code-quality/SKILL.md
License: MIT
Author: wondelai
Website: https://skills.wondel.ai

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

wondelai. (2026). Improve Code Quality [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/improve-code-quality/

BibTeX

@misc{improve-code-quality-2026,
  author    = {wondelai},
  title     = {Improve Code Quality [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/improve-code-quality/}
}

Embed this skill

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Badge

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Security scan

Grade A · scanned 2026-07-22 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/improve-code-quality/#security)

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