Claude Code Skills·Claude Skills·The open SKILL.md registry for Claude
ClaudSkills / Dev Tools / linters-formatters

Assay

Category: Dev Tools  ·  Sub-category: linters-formatters  ·  Last updated:
type:audittype:review
Invoke this skill (or /rulesense:assay) any time a user wants feedback on rule files they already have. This covers CLAUDE.md and .claude/rules/ — grading, scoring, auditing, reviewing, or critiquing the structural clarity of existing instructions. Trigger broadly: if someone asks "are my rules any good", "look at my rules", "check my CLAUDE.md", "grade my instruction files", "which rules are weak/vague/passive/garbage", "triage this inherited rule set", or "which rules should be hooks instead" — this is the skill. Also trigger when someone references /rulesense:assay with any flags (--json, --fix, --verbose). The core signal is: the user has existing Claude Code rules and wants an opinion on their quality. This skill reads and evaluates — it never creates new rules (that's forge), never reviews code or PRs, and ignores non-Claude-Code config like eslint or prettier.
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Score the project's Claude Code instruction files for structural clarity — how clearly Claude can parse and apply each rule. Language: Scoring is English-only. Non-English rules will receive inaccurate scores. If arguments are provided, treat them as flags: $ARGUMENTS Supported flags: --fix (suggest + apply rewrites), --verbose (detailed factor breakdown), --json (machine-readable)

What this skill does

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

Who uses this skill

The Assay 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 164,000+ 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/assay
curl -L https://claudskills.com/skills/assay/SKILL.md \
  -o ~/.claude/skills/assay/SKILL.md

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

Skills live at ~/.claude/skills/assay/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\assay\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.

Frequently asked questions

How do I install the Assay Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/assay/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Assay skill do?
Invoke this skill (or /rulesense:assay) any time a user wants feedback on rule files they already have. This covers CLAUDE.md and .claude/rules/ — grading, scoring, auditing, reviewing, or critiquing the structural clarity of existing instructions. Trigger broadly: if someone asks "are my rules any good", "look at my rules", "check my CLAUDE.md", "grade my instruction files", "which rules are weak/vague/passive/garbage", "triage this inherited rule set", or "which rules should be hooks instead" — this is the skill. Also trigger when someone references /rulesense:assay with any flags (--json, --fix, --verbose). The core signal is: the user has existing Claude Code rules and wants an opinion on their quality. This skill reads and evaluates — it never creates new rules (that's forge), never reviews code or PRs, and ignores non-Claude-Code config like eslint or prettier.
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 Assay skill?
Use Assay when your Claude Code task falls under the Dev Tools category — specifically in the linters formatters 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 Assay" or describe the task and let Claude pick). Browse related skills at /category/tools/.
What is a Claude Code skill and how does the Assay 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. Assay 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
IamK77. (2026). Assay [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/assay/
BibTeX
@misc{assay-2026,
  author    = {IamK77},
  title     = {Assay [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/assay/}
}

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Security scan

Grade A · scanned 2026-07-29 — 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 ›

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

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

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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