I couldn't sleep, so I decided to build a Pulumi C# application that uses an existing MCP Server. My forms will utilise the client to allow me to access my Azure subscriptions and resources - wow. Build a really cool tool quickly - Claude Sonnet 4 is once again significantly better than GPT-4.1 for programming with GitHub Copilot.
Update Sept 2025: I'm now using GPT-5 over Claude Sonnet with GitHub Copilot when programming in VS code. Both feel about the same quality to me.