Twilio is definitely on the list. The thing I'm thinking about is that, while signature verification is likely the same across products, handling the events is different. For example, SMS and Voice support responses; the webhooks also fetch instructions. So, is that a single skill or multiple skills?
I had access to Verdent during early access over the past few weeks, and I've found it to be better than my previous experience with Roo Code + Gemini/Claude.