Waxa Eval

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

Category: General · Sub-category: automation · Last updated: 2026-05-27

Use when iterating on a skill''s prompt with the waxa CLI (https://github.com/mizchi/skills/tree/main/tools/waxa) — authoring scenarios, choosing graders, interpreting unclear-points, advancing a ledger, and judging convergence. Encodes the four-stage iteration pattern observed in real iter loops (structural fix → grader breadth → surface-form coverage → residual unclear) and the scenario-design pitfalls (blank-slate executor''s network limit, prompt expectation explicitness, regex coverage of Japanese/English surface forms). Meta-skill: do NOT auto-invoke for routine skill edits; fires only when the user explicitly runs waxa or asks for a skill-quality eval.

From the source SKILL.md

Empirical evaluation loop for skill prompts, codified from real iter runs. This skill is the operating manual for waxa; the CLI itself lives in tools/waxa/ (see its README for argument-level reference).

What this skill does

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

When to invoke it: Use when iterating on a skill''s prompt with the waxa CLI (https://github.com/mizchi/skills/tree/main/tools/waxa) — authoring scenarios, choosing graders, interpreting unclear-points, advancing a ledger, and judging convergence.

Who uses this skill

The Waxa Eval Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 76,000+ 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/waxa-eval
curl -L https://claudskills.com/skills/waxa-eval/SKILL.md \
  -o ~/.claude/skills/waxa-eval/SKILL.md

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

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

Frequently asked questions

How do I install the Waxa Eval Claude Code skill?

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

What does the Waxa Eval 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 Waxa Eval skill?

Use Waxa Eval when your Claude Code task falls under the General category — specifically in the automation 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 Waxa Eval" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Waxa Eval 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. Waxa Eval is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/mizchi/skills/blob/HEAD/meta/waxa-eval/SKILL.md
Author: mizchi

Cite this skill

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

APA

mizchi. (2026). Waxa Eval [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/waxa-eval/

BibTeX

@misc{waxa-eval-2026,
  author    = {mizchi},
  title     = {Waxa Eval [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/waxa-eval/}
}

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Badge

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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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