Junie by JetBrains

Junie by JetBrains is a coding agent that runs from your terminal or CI/CD pipeline to plan, write, and debug code using the AI model of your choice. It connects to services like GitHub and GitLab so you can kick off tasks from issues or pull requests. The agent supports multiple models via Bring Your Own Key — you pick the provider and pay only AI usage costs with no markup. It also works with locally running models through Ollama.

What sets Junie by JetBrains apart is Plan Mode, which writes structured plans covering requirements, design, and delivery stages before touching a single line of code. You approve or redirect before execution. Live Prompting lets you change direction mid-task without restarting. The agentic debugger doesn't just read logs — it starts a real debugger, sets breakpoints, and inspects runtime state in JVM/IntelliJ applications. You can also use Remote Control: start a migration on your laptop, then check progress and review the PR from your phone. Custom subagents break complex tasks into parallel subtasks, and MCP integration lets you extend the agent with custom tools, databases, and APIs.

Developers and engineering teams working on large codebases will get the most from Junie by JetBrains. It handles migrations (like Spring Boot upgrades), adds test coverage, and automates repetitive debugging sessions. If you already use JetBrains IDEs or want a model-agnostic coding agent for CI/CD pipelines, this tool is worth trying.