Cross Validation

by chekusu

Cross Validation is a Quality skill for Claude Code, published by chekusu in wanman.

679 stars106 forkson chekusu/wanmanAdded 2026/08/24Repository updated 2026/06/14

View source on GitHub Download repo ZIP

agentclaude-codecodexllm

Install in seconds

Install Cross Validation

Copy Cross Validation into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/chekusu/wanman/tree/main/packages/core/skills/cross-validation ~/.claude/skills/cross-validation

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/chekusu/wanman.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: packages/core/skills/cross-validation/SKILL.md in chekusu/wanman
Installs to: ~/.claude/skills/cross-validation
Collection: One of 6 skills cataloged from this repository
Category: Quality — 1354 skills

What Cross Validation does

Cross Validation checks agent outputs for consistency after tasks are done. It compares files for conflicting facts and creates correction tasks based on the authoritative source order.

Cross Validation is cataloged under Quality on DirSkills. Cross Validation comes from a repository tagged agent, claude-code, codex and llm.

Documentation

README

Excerpt

# List all agent output files
find /workspace/agents -name "*.md" -o -name "*.html" | grep -v CLAUDE.md | sort

Step 2: Extract Key Facts

Extract the following key information from each file:

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Cross Validation

What else does chekusu publish alongside Cross Validation?
Cross Validation is one of 6 skills that DirSkills catalogs from chekusu/wanman, the repository it ships in. Its siblings there include Artifact Naming Conventions, Artifact Quality and Research Methodology. Each one is a separate skill with its own page in this directory, installs the same way Cross Validation does, and is maintained by chekusu in that same repository. The rest of the collection is listed on the chekusu/wanman page.
How does Cross Validation compare to other Quality skills?
Cross Validation ranks #1073 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Cross Validation against them. Open each page to compare what they document and how they install.