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JetBrains Extension

🎥Plug & Play
Watch the demo

The JetBrains extension is designed to work within your IDE. Goose can accomplish a lot of the developer-centric tasks with the Developer extension that is enabled on install, however, the JetBrains extension provides a more integrated and project-aware way to work with code.

This tutorial covers how to enable and use the JetBrains MCP Server as a built-in Goose extension to integrate with any JetBrains IDE.

Known Limitation

The JetBrains extension does not work with OpenAI models (e.g. gpt-4o).

Configuration​

  1. Add the MCP Server plugin to your IDE.

  2. Enable built-in Goose extension:

  1. Run the configure command:
goose configure
  1. Choose to add a Built-in Extension
┌   goose-configure 
│
◇  What would you like to configure?
│  Add Extension 
│
◆  What type of extension would you like to add?
│  ● Built-in Extension (Use an extension that comes with Goose)
│  ○ Command-line Extension 
│  ○ Remote Extension 
└
  1. Arrow down to the JetBrains extension and press Enter
┌   goose-configure 
│
◇  What would you like to configure?
│  Add Extension 
│
◇  What type of extension would you like to add?
│  Built-in Extension 
│
◆  Which built-in extension would you like to enable?
│  ○ Developer Tools 
│  ○ Computer Controller 
│  ○ Google Drive 
│  ○ Memory 
│  ● JetBrains (Connect to jetbrains IDEs)
└  Enabled jetbrains extension

Example Usage​

In this example, I'm going to upgrade a Java project to the latest LTS version.

LLM

Anthropic's Claude 3.5 Sonnet was used for this task.

  1. Open IntelliJ (JetBrains' Java and Kotlin IDE)
  2. Open a terminal within your IDE and start a new Goose session:
goose session
tip

When using Goose to refactor code, it's recommended to commit your code to version control before making changes. This way, you have a clean snapshot to compare against, making it easy to review Goose’s modifications, revert if needed, and track improvements.

Goose Prompt​

using the JetBrains IDE tools, upgrade this project to use the latest Java LTS version and refactor the codebase to use newer Java features where beneficial.

After 2 minutes, Goose was done with the upgrade! 🎉

Goose Output​

I'll make several improvements to modernize this codebase to use Java 21 (latest LTS) features. Here are the changes I'll implement:

1. Update the `pom.xml` to use Java 21
2. Use newer Java features 

[... code changes ...]

Here's a summary of the modernization changes made:

1. `pom.xml`:
   - Set Java version to 21
   - Enabled preview features
   - Updated all dependencies to their latest stable versions

2. `AccountsOverviewPage.java`:
   - Made the class `final` since it extends the sealed `Page` class
   - Updated stream collection to use `.toList()` instead of `collect(Collectors.toList())`
   - Made fields final for better immutability

3. `Page.java`:
   - Converted to a sealed class
   - Restricted which classes can extend it using `permits`
   - Made fields protected and final where appropriate
   - Added pattern matching for exception handling
   - Implemented Optional for null safety
   - Used String Templates for error messages
   - Added functional programming concepts with Supplier
   - Enhanced error handling with specific exception types

4. `LoginComponent.java`:
   - Added a private record for credentials
   - Implemented pattern matching with record patterns
   - Made fields final for better immutability

5. `AccountTests.java`:
   - Implemented structured concurrency using `StructuredTaskScope`
   - Used parallel execution for UI and API tasks
   - Improved error handling with structured task management
   - Used pattern matching and type inference with `var`

6. `BaseTests.java`:
   - Implemented structured concurrency for setup tasks
   - Improved resource management
   - Better exception handling
   - Used modern Duration API

7. `APIUtil.java`:
   - Implemented String Templates (Java 21 preview feature)
   - Used modern text blocks

8. `Customers.java`:
   - Added sealed interface for customer types
   - Implemented pattern matching for switch expressions
   - Added pattern matching for instanceof
   - Enhanced type safety with records

Key modern Java features used:
- String Templates (Java 21 Preview)
- Pattern Matching for switch (Java 21)
- Sealed Classes and Interfaces (Java 17)
- Records (Java 16)
- Pattern Matching for instanceof (Java 16)
- Text Blocks (Java 15)
- Switch Expressions (Java 14)

The codebase is now using the latest Java LTS version (21) and incorporates many modern Java features that improve:
- Type safety
- Null safety
- Code readability
- Error handling
- Performance

Using the JetBrains extension provided several advantages and made it easier for Goose to:

  • navigate through the codebase
  • track changes
  • make consistent modifications across files
  • verify the content of files before and after changes