---
title: "diff"
description: "Compare live platform package state with configured declarations."
---

> Documentation Index
> Fetch the complete documentation index at: https://outfitting.jfa.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# diff

**Syntax:** `outfitting-manager diff [flags]`

`diff` is read-only. It compares platform state with the configured source and returns a nonzero status when differences are found or a required comparison is unavailable.

| Option | Description |
| --- | --- |
| `--manager <name>` | Compare one package manager instead of all managers for the platform. |
| `--profile <profile>` | Select a profile; Windows accepts comma-separated profiles and Linux accepts one. |
| `--offline` | Use the validated local source snapshot and skip the remote Nix comparison. |
| `--refresh` | Linux only: refresh the selected source before comparing. |
| `--json` | Print the comparison result as JSON. |

## Platform comparison scope

| Platform | Compared state |
| --- | --- |
| macOS | Homebrew and Nix system state. |
| Linux | Declared apt or pacman packages; unrelated installed packages are ignored. |
| Windows | WinGet and Scoop state. |

Source: https://outfitting.jfa.dev/docs/cli/diff/index.mdx