A compiler (hobby project). A web application server (tooling for my consultancy). An agentic framework to part-automate end-to-end development of a large web app (customer project). An analytics platform to analyze infrastructure maturity (customer project).

Usually I'll have several Claude Code sessions running in parallel on different projects, and when one of them stops I will review the code for that project and start it again - either moving forwards or re-doing things that have issues.