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Apple Harness

Category: Engineering  ·  Sub-category: code-quality  ·  Last updated:
type:review
apple-craft long-running implementation harness — builds new apps/features from scratch or runs large-scale Apple development work that reshapes the whole app, via a Plan→Design→Build→Evaluate loop. Activates on requests like "처음부터", "새 앱", "전체 구현", "앱 전체", "전면 리팩토링", "대규모 기능 개발", "멀티스텝 장기 작업", "harness", "하네스", "feature development", "new app", "full implementation", "from scratch". For single-file edits, small refactors, or code review, apple-craft or apple-review is a better fit.
Security AStatic scan found no risk patternsHow grading works ›

About this skill (catalog notes)

Apple Harness includes pricing or quota commentary; 40 code blocks for direct copy-paste. At roughly 8,615 words the SKILL.md is on the longer end of the catalog distribution.

Original author
oozoofrog
Indexed lastmod
Catalog position
Engineering · code-quality
Indexed related skills
10

How Apple Harness fits the catalog

Apple Harness sits in the Engineering category under the code-quality sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

<example> user: "처음부터 Liquid Glass를 적용한 설정 화면을 만들어줘" assistant: "harness 모드로 Plan→Build→Evaluate 루프를 시작합니다. 먼저 Planner 에이전트로 스펙을 작성하겠습니다." </example>

What this skill does

Apple Harness is a community-contributed Claude Code skill in the code-quality sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/apple-harness/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Apple Harness 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 115,000+ 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/apple-harness
curl -L https://claudskills.com/skills/apple-harness/SKILL.md \
  -o ~/.claude/skills/apple-harness/SKILL.md

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

Skills live at ~/.claude/skills/apple-harness/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\apple-harness\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 Apple Harness Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/apple-harness/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Apple Harness skill do?
apple-craft long-running implementation harness — builds new apps/features from scratch or runs large-scale Apple development work that reshapes the whole app, via a Plan→Design→Build→Evaluate loop. Activates on requests like "처음부터", "새 앱", "전체 구현", "앱 전체", "전면 리팩토링", "대규모 기능 개발", "멀티스텝 장기 작업", "harness", "하네스", "feature development", "new app", "full implementation", "from scratch". For single-file edits, small refactors, or code review, apple-craft or apple-review is a better fit.
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 Apple Harness skill?
Use Apple Harness when your Claude Code task falls under the Engineering category — specifically in the code quality 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 Apple Harness" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the Apple Harness 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. Apple Harness is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering 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
oozoofrog. (2026). Apple Harness [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/apple-harness/
BibTeX
@misc{apple-harness-2026,
  author    = {oozoofrog},
  title     = {Apple Harness [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/apple-harness/}
}

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<script>
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<iframe>
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Security scan

Grade A · scanned 2026-06-13 — 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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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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