# Prompt Inject Removal

> A secure sanitization system to strip instructions from external content.

- Skill: `modbender/prompt-inject-removal` (Agent Skill, multi-file: 4 files)
- Install (CLI): `npx skillmds@latest add modbender/prompt-inject-removal`
- Raw SKILL.md: https://api.skillmd.com/api/skills/modbender/prompt-inject-removal/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: modbender (https://skillmd.com/u/modbender)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/modbender/prompt-inject-removal

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# 🛡️ Prompt Inject Removal

This skill provides a secure way to summarize untrusted external content (web pages, articles, blogs) by routing it through a "Zero-Trust" sanitization prompt.

## 🚀 Setup & Configuration

This skill is powered by a local, hardened system prompt. No external API keys or complex configuration are required.

## 📐 Workflow (Sanitization)

1. **Fetch:** Raw content is retrieved via \`web_fetch\` or \`browser\`.
2. **Delimit:** The content is wrapped in \`<untrusted_input_data>\` tags.
3. **Sanitize:** The Main Agent processes the content using the rules in [PROMPT.md].
4. **Ingest:** Only the resulting sanitized summary is used in the conversation.

## 📖 Security Reference

- **Detailed Security Docs:** [references/security.md]
- **Hardened System Prompt:** [PROMPT.md]

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_Disclaimer: This is a defense-in-depth tool. While it significantly mitigates prompt injection risks, no prompt-based sanitization is 100% foolproof. Review sanitized data before performing state-changing actions._