How do I install the Reduce Header Includes Claude Code skill?

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

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.

ClaudSkills / Engineering / engineering-misc

Reduce Header Includes

Category: Engineering · Sub-category: engineering-misc · Last updated: 2026-05-21

lang:javascript

Use when the user wants to remove unused #include directives from a WebKit source directory (bmalloc, WTF, JavaScriptCore, WebCore, WebKit) to reduce build time. Runs clang-include-cleaner with WebKit-specific false-positive filters, ranks headers by ninja-deps fan-out, and fixes transitive breakage in a -k 0 loop.

What this skill does

Reduce Header Includes is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/reduce-header-includes/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user wants to remove unused #include directives from a WebKit source directory (bmalloc, WTF, JavaScriptCore, WebCore, WebKit) to reduce build time. Runs clang-include-cleaner with WebKit-specific false-positive filters, ranks headers by ninja-deps fan-out, and fixes transitive breakage in a -k 0 loop.

Who uses this skill

The Reduce Header Includes Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ 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/reduce-header-includes
curl -L https://claudskills.com/skills/reduce-header-includes/SKILL.md \
  -o ~/.claude/skills/reduce-header-includes/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/reduce-header-includes/. Claude Code auto-discovers it on next session.

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

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

Attribution & license

Source: https://github.com/WebKit/WebKit/blob/HEAD/.claude/plugins/reduce-header-includes/skills/reduce-header-includes/SKILL.md
Author: WebKit

More Engineering skills

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

Browse all Engineering skills → Top 100 skills

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Reduce Header Includes

What this skill does

Who uses this skill

How to install

Manual install (2 steps)

One-click install via the desktop app

Attribution & license

More Engineering skills

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