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Phy Bundle Size Audit

Category: Dev Tools  ·  Sub-category: ide-editor  ·  Last updated:
lang:javascripttype:audit
JavaScript bundle size auditor and budget enforcer. Parses webpack stats JSON, Vite bundle report, Rollup output, or Next.js build output to identify largest chunks, flag chunks that exceed configurable size budgets, detect duplicate dependencies across chunks, find treeshaking failures (packages that should be side-effect-free but aren't), and generate CI fail-gate commands. Outputs a GitHub PR annotation-ready summary with per-chunk size, gzip estimate, and actionable optimization suggestions. Zero external API — pure local file analysis. Triggers on "bundle too large", "webpack stats", "chunk size", "bundle budget", "treeshaking", "bundle analyzer", "/bundle-size-audit".
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

You added one import. Your Lighthouse score dropped 12 points. Your LCP went from 1.8s to 3.1s.

What this skill does

Phy Bundle Size Audit is a community-contributed Claude Code skill in the ide-editor sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/phy-bundle-size-audit/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Phy Bundle Size Audit Claude Code skill is built for developers, power users, and teams automating repetitive workflows and improving developer experience. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 213,000+ 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/phy-bundle-size-audit
curl -L https://claudskills.com/skills/phy-bundle-size-audit/SKILL.md \
  -o ~/.claude/skills/phy-bundle-size-audit/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/phy-bundle-size-audit/. Claude Code auto-discovers it on next session.

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

Telegram

📱 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 Phy Bundle Size Audit Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/phy-bundle-size-audit/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Phy Bundle Size Audit skill do?
JavaScript bundle size auditor and budget enforcer. Parses webpack stats JSON, Vite bundle report, Rollup output, or Next.js build output to identify largest chunks, flag chunks that exceed configurable size budgets, detect duplicate dependencies across chunks, find treeshaking failures (packages that should be side-effect-free but aren't), and generate CI fail-gate commands. Outputs a GitHub PR annotation-ready summary with per-chunk size, gzip estimate, and actionable optimization suggestions. Zero external API — pure local file analysis. Triggers on "bundle too large", "webpack stats", "chunk size", "bundle budget", "treeshaking", "bundle analyzer", "/bundle-size-audit".
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 Phy Bundle Size Audit skill?
Use Phy Bundle Size Audit when your Claude Code task falls under the Dev Tools category — specifically in the ide editor 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 Phy Bundle Size Audit" or describe the task and let Claude pick). Browse related skills at /category/tools/.
What is a Claude Code skill and how does the Phy Bundle Size Audit 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. Phy Bundle Size Audit is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Dev Tools category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

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

APA
LeoYeAI. (2026). Phy Bundle Size Audit [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/phy-bundle-size-audit/
BibTeX
@misc{phy-bundle-size-audit-2026,
  author    = {LeoYeAI},
  title     = {Phy Bundle Size Audit [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/phy-bundle-size-audit/}
}

Embed this skill

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Badge
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<script>
<script src="https://claudskills.com/embed/phy-bundle-size-audit.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/phy-bundle-size-audit.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Phy Bundle Size Audit"></iframe>

Security scan

Grade A · scanned 2026-11-01 — 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 ›

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Browse all Dev Tools skills in the ClaudSkills registry, or explore these other picks from the same category:

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