That said, VSCode is a popular platform for this for exactly the reason I think consolidation is eventually inevitable: it's got a huge preexisting ecosystem. There are extensions for practically anything you could ask for.
There's likely room for some standalone, focused apps in this space. I just don't see the current wave of "we put a wrapper around Claude Code and gave it some basic MCP and custom prompt management tools like a dozen other applications this week" being sustainable.
They're all going to end up on their own tiny islands unless there's a reason for an ecosystem to develop around them.