my new recipe for learning and satisfying curiosities: if I see a really cool piece of tech, I'll try to build my own version (without looking at the source code). even for complicated stuff, it's now possible to figure things out with one weekend and a bunch of LLM credits. that's how you get deep down the stack and remain irreplaceable for longer as an engineer. has been so satisfying to implement my own Vapi/Voice Agent SDK. next, I think I'll try to build a mini openclaw