At the moment I predominantly work with Python and hence PyCharm as the main IDE. However, I've built this plugin https://plugins.jetbrains.com/plugin/31117-agent-cli to render agentic CLIs as an editor tab in PyCharm and also some notification hooks so I don't have to switch windows and it's easy to jump around the code while the agent is doing its work.

Besides that I have a collection of custom skills (plan for JIRA tickets, github PR creation, code review, etc), a set of MCPs (most are for internal tooling) and most of the time I use Claude Code.