Thu, Jul 23 04:26 AM

L1.9: I built a prompt injection firewall for AI agents (28 detection rules)

Dev.to•Thu, Jul 23, 2026, 04:00 AM•2 min read

Prompt injection is the #1 attack against AI agents. Nobody solves it well. I built L1.

Source: [Dev.to](https://dev.to/edison_flores_6d2cd381b13/l19-i-built-a-prompt-injection-firewall-for-ai-agents-28-detection-rules-18nb)

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#tech #rules #injection #instructions #prompt #tool #skill #send #data

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L1.9: I built a prompt injection firewall for AI agents (28 detection rules)

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