Deepseek/Deepseek Harness with about 30 plugins and a lot of customization. I tried IDE integrations with Jetbrains for a few months and hated it. Now I enjoy juggling 3-4 projects at once. Costs maybe $20/week. A lot of jobs you can work at for a long time with little cost because there's a 99% cache hit rate.

Sometimes I despatch it on open-ended tasks that I'd never take on otherwise; for example I have a little fleet of 10 agents digging up medieval Japanese Buddhist parables, translating them from scratch, and feeding them into a custom interface optimized for language study.

Most of the time I give it a moderately detailed description of the scope and key/unique features I want in a new project, and it banks on work from previous projects to know what sort of deliverables I want, track and review its own mistakes etc., then I steer it from a rough prototype into something more polished. I find it equally useful for coding/application development and research/synthesis tasks.