Ward: Open-source tool intercepts npm installs to block supply chain attacks for Claude Code users
Ward is an open-source security tool built by Vanguard Defense Solutions after the [email protected] compromise incident. It hooks into your package manager and checks every package before install scripts execute.
When Claude Code runs npm install on your behalf, Ward automatically screens packages. The tool includes a Claude Code hook that intercepts every install command before execution, eliminating the need for manual intervention.
Key features
- Blocks known malware packages
- Detects typosquats (warns when packages like "axxios" resemble legitimate packages like "axios")
- Flags suspicious install scripts
- Identifies version anomalies
- Ships with 42 verified real-world attack patterns
Example output
$ npm install [email protected]
✗ ward: BLOCKED
This version steals SSH keys and cloud credentials
Safe version: 1.14.0Installation
npm install -g wardshield
ward initThe tool is MIT licensed and includes 286 tests. It was developed specifically for the Claude Code community following supply chain attack concerns.
Additional resources include a live threat feed at wardshield.com and the GitHub repository at Vanguard-Defense-Solutions/ward.
📖 Read the full source: r/ClaudeAI
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