A security layer for AI coding agents
Harden AIF is a free, local security tool for AI coding agents. Its post-trained model checks tool calls before they run, using your request and session context. It beat frontier models on key agent-security benchmarks, while keeping your repo and tool output on your machine.
Harden launched on Product Hunt on 2026-09-09 and has 387 upvotes and 110 comments so far.
This tool is described as free to use.