Check Fact

by wasabeef

Check Fact is a Quality skill for Claude Code, published by wasabeef in claude-code-cookbook.

1.1K stars111 forkson wasabeef/claude-code-cookbookAdded 2026/08/20Repository updated 2026/04/15

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claude-code

Install in seconds

Install Check Fact

Copy Check Fact 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/wasabeef/claude-code-cookbook/tree/main/plugins/en/skills/check-fact ~/.claude/skills/check-fact

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/wasabeef/claude-code-cookbook.git

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

In this catalog

Source file: plugins/en/skills/check-fact/SKILL.md in wasabeef/claude-code-cookbook
Installs to: ~/.claude/skills/check-fact
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What Check Fact does

Check Fact verifies whether statements are accurate by checking a project's code, documentation, and config files. Use it to fact-check technical claims, architecture choices, or documentation accuracy.

Check Fact is cataloged under Quality on DirSkills. Check Fact comes from a repository tagged claude-code.

Documentation

README

Excerpt

Verify information accuracy against codebase and docs

Verifies if a statement is true by checking your project's code and documentation.

Usage

# Basic usage
/check-fact "The Flutter app uses Riverpod"

# Check multiple facts at once
/check-fact "This project uses GraphQL and manages routing with auto_route"

# Check technical details
/check-fact "JWT is used for authentication, and Firebase Auth is not used"

How It Works

Where I Look (in order)
- The actual code (most trustworthy)
- README.md and docs/ folder
- Config files (package.json, pubspec.yaml, etc.)
- Issues and PR discussions

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

Commands Check Fact provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/check-fact

Frequently asked about Check Fact

What else does wasabeef publish alongside Check Fact?
Check Fact is one of 25 skills that DirSkills catalogs from wasabeef/claude-code-cookbook, the repository it ships in. Its siblings there include Analyze Dependencies, Analyze Performance and Check Prompt. Each one is a separate skill with its own page in this directory, installs the same way Check Fact does, and is maintained by wasabeef in that same repository. The rest of the collection is listed on the wasabeef/claude-code-cookbook page.
How does Check Fact compare to other Quality skills?
Check Fact ranks #773 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 Check Fact against them. Open each page to compare what they document and how they install.