Hey dev.to π If you've read my previous post about layercache , you know it's a multi-layer caching library for Node.js β Memory β Redis β Disk behind a single get() call, with stampede prevention, tag invalidation, circuit breaking, and all the production-grade stuff you eventually need. Today I'm releasing v1.3.3 , and it's different from all the previous releases. No new features. No benchmark numbers. No shiny API additions. Just nine bugs I found in my own library. I want to walk through all of them β what they were, why they happened, and what I did to fix them. Some are embarrassing. All of them are real. Why I did a full security audit When you're building in the open and people start actually using the thing, you feel differently about the code. I went back through the internals with fresh eyes and a specific question: what could go wrong in production under real load? Turns out: a lot. Here's everything I found, roughly in severity order.β¦