I found #ChatGPT useful for creating more complicated snippets involving regex expressions. Specifically, I wanted a snippet that could take a LaTeX expression such as (x+y=z) and add \left and \right modifiers to the delimiter to create \left(x+y=z \right). It took two tries on GPT's part, but the second solution worked to give exactly what I wanted (and even helpfully formatted it in the VScode JSON format that I needed, even though I didn't ask for this). https://chat.openai.com/share/35a5eee7-9318-4bdf-809a-a77ba9afba81