Agent: pi, JetBrains IDEsLLM: Claude, GPT-4#agentic-ide#vibe-coding#pi-agent#spec-driven#jetbrains
ThinkRail is JetBrains' agentic IDE built around the pi coding agent. It provides isolated git-worktree workspaces, living specs for durable project knowledge, reusable agent skills, and a full IDE interface. The agent works in parallel branches without touching your main checkout, and ThinkRail is evolving toward full extension support where it creates the tools it needs based on how you actually work.