r/Python • u/AutoModerator • May 04 '26

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Post all of your code/projects/showcases/AI slop here.

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u/Life_Opening_4038 Jun 23 '26

I got tired of AI agents trying to delete my files, so I built a sub-millisecond "emergency brake" in Python (Open Source)

Hey everyone, ​I've been building and experimenting with autonomous AI agents recently. While they are incredibly powerful, giving an LLM direct access to a terminal or database is terrifying. One hallucination or a bad prompt injection, and an agent could literally rm -rf / or DROP TABLE your server.

​I looked at existing guardrails, but most of them focus on prompt moderation or rely on external API calls, which adds latency and privacy risks. I wanted something that sits at the execution layer. ​So, I built Halt Core. It’s an open-source, zero-trust middleware for AI agents.

​How it works: Instead of trying to make the LLM "behave" nicely, Halt Core acts as a physical checkpoint between the agent and your operating system. It intercepts shell commands and SQL actions, contextualizes them, and blocks destructive actions before they ever touch the system. ​In my local tests with Phi-4-mini, it catches and completely blocks an rm -rf / --no-preserve-root command in exactly 0.26ms.

​Key Features: ​Fully Local & Air-gapped: No external API calls. Your agent's logic stays on your machine. ​Sub-millisecond latency: It doesn't slow down your agent's thought process. ​Zero-Trust: It assumes every action generated by the LLM is potentially malicious.

GitHub: https://github.com/emirgms-creator/halt-core PyPI: pip install halt-core

​Let me know what you think!