Archive legacy repository

[Matthew-Grayson]

Problem

The code in cisagov/crossfeed was migrated to this repo in March of 2024. That repo remains visible and unarchived, which could cause confusion.

Key issues:

• The old repo is active but is no longer maintained.
• Users may think that CISA doesn't maintain its code.

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Recommended Actions

1. Archive cisagov/crossfeed

   • Use GitHub’s Settings → Archive this repository option to mark it read-only.
   • This clearly signals that the codebase is deprecated and prevents new commits or issues.

2. Update the README.md
   Add a clear note at the top linking to the new repository:

   > [!NOTE]  
   > This repository has been archived. Active development continues at  
   > 👉 [https://github.com/cisagov/xfd](https://github.com/cisagov/xfd)

   • Optionally, add the DEPRECATED topic in repository settings for search clarity.

Justification

Archiving unused repos reduces maintenance overhead, improves discoverability of the active codebase, and prevents confusion in audits and vulnerability scans. It aligns with standard best practices for code governance and lifecycle management, especially in multi-repo environments.

Archiving this repository will:

• Prevent accidental contributions to deprecated code.
• Maintain compliance with software governance policies.
• Make cisagov's overall codebase look cleaner.

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References:

• GitHub Docs: Archiving repositories
• GitHub Docs: About repository topics