Plimsoll: an agent skill for testing prompt injection, leaks, and tool abuse

Reddit r/AI_Agents Tools

Summary

Plimsoll is an open-source agent skill designed for red-teaming LLM applications and agents, focusing on security testing for issues like prompt injection, leaks, and tool abuse.

I’ve been working on LLM/agent security for a while now, mostly around prompt injection, jailbreaks, leaks, tool abuse, and where the actual security boundary sits once a model starts using tools. Getting accepted into Anthropic’s Cyber Verification Program gave me a bit more room to push that work further, and I’ve been gradually turning it into Plimsoll. It’s an open-source agent skill for red-teaming LLM apps and agents.
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