# Source Comparison

Compare multiple sources on a topic and produce a grounded comparison matrix.

- Repository: https://github.com/Companion-Inc/feynman (10055 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-10-31
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add Companion-Inc/feynman --skill source-comparison -g -a claude-code -y`
Codex: `npx skills add Companion-Inc/feynman --skill source-comparison -g -a codex -y`
Cursor: `npx skills add Companion-Inc/feynman --skill source-comparison -g -a cursor -y`
Gemini CLI: `npx skills add Companion-Inc/feynman --skill source-comparison -g -a gemini-cli -y`

## Description

Compare multiple sources on a topic and produce a grounded comparison matrix. Use when the user asks to compare papers, tools, approaches, frameworks, or claims across multiple sources.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Source Comparison

Run the `/compare` workflow. The slash command expands the full workflow instructions in the active session; do not try to read a relative prompt-template path from the installed skill directory.

Agents used: `researcher`, `verifier`

Output: comparison matrix in `outputs/`.