Sharpen Knife

Q: What is a Claude Code skill and how does the Sharpen Knife 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. Sharpen Knife is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: testing · Last updated: 2026-06-08

Sharpen and maintain knives using whetstones, field stones, and improvised abrasives. Covers blade anatomy, bevel assessment, whetstone technique (coarse to fine progression), stropping, sharpness testing, field sharpening methods, and ongoing edge maintenance. Use when a knife fails the fingernail test, when cutting tasks require excessive pressure, before a trip where a sharp blade is essential, after heavy use, or when a blade has visible nicks or a rolled edge. Applicable to bushcraft blades, folding knives, and garden cutting tools.

About this skill (catalog notes)

Sharpen Knife includes 8 code blocks for direct copy-paste. At roughly 2,857 words the SKILL.md is on the longer end of the catalog distribution.

Source: pjt222.github.io/agent-almanac
License: MIT
Original author: pjt222
Indexed lastmod: 2026-06-08
Catalog position: Engineering · testing
Indexed related skills: 10

How Sharpen Knife fits the catalog

Sharpen Knife sits in the Engineering category under the testing 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

Sharpen and maintain a knife edge using whetstones, strops, and field-expedient methods.

What this skill does

Sharpen Knife is a community-contributed Claude Code skill in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/sharpen-knife/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when a knife fails the fingernail test, when cutting tasks require excessive pressure, before a trip where a sharp blade is essential, after heavy use, or when a blade has visible nicks or a rolled edge. Applicable to bushcraft blades, folding knives, and garden cutting tools.

Who uses this skill

The Sharpen Knife 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 94,000+ 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/sharpen-knife
curl -L https://claudskills.com/skills/sharpen-knife/SKILL.md \
  -o ~/.claude/skills/sharpen-knife/SKILL.md

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

Skills live at ~/.claude/skills/sharpen-knife/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\sharpen-knife\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 Sharpen Knife Claude Code skill?

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

What does the Sharpen Knife 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 Sharpen Knife skill?

Use Sharpen Knife when your Claude Code task falls under the Engineering category — specifically in the testing 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 Sharpen Knife" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Sharpen Knife 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. Sharpen Knife 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

Source: https://github.com/pjt222/agent-almanac/blob/HEAD/i18n/caveman-lite/skills/sharpen-knife/SKILL.md
License: MIT
Author: pjt222
Website: https://pjt222.github.io/agent-almanac/

Cite this skill

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

APA

pjt222. (2026). Sharpen Knife [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/sharpen-knife/

BibTeX

@misc{sharpen-knife-2026,
  author    = {pjt222},
  title     = {Sharpen Knife [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/sharpen-knife/}
}

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