Junie

Junie is the AI coding agent from JetBrains. It works in the terminal, inside JetBrains IDEs, and in GitHub or GitLab pipelines.

Planning and control

• Advanced plan mode writes structured requirements, design and delivery stages into .junie/plans before Junie touches code, so you can approve or redirect the plan.
• Live prompting lets you change direction while a task runs, and human-in-the-loop checks ask for confirmation before key actions through a dynamic allowlist.
• You can plan on a strong model and implement on a fast one.

Working while you are away

• Remote control starts an asynchronous run and shows progress in the CLI and in the web app, which suits migrations and Spring Boot upgrades.
• Agentic debugging starts a real debugger, sets breakpoints, inspects runtime state and steps through code instead of only reading logs.

Extending it

• Custom guidelines and Agent Skills carry your team's standards across sessions, with /commands shared between the CLI and the IDE over ACP.
• Custom subagents split work into parallel subtasks; MCP integration adds tools, databases and APIs, and the setup includes an MCP configuration assistant.

Cost and requirements Junie Lite is a free model available in every JetBrains account, and AI usage is billed separately. Bring-your-own-key gives provider-rate pricing without markup, and heavier use runs on the JetBrains AI Pro or AI Ultimate subscription. The cask installs the Junie CLI on macOS; Windows and Linux builds are also available from JetBrains.