Goose vs JetBrains AI / Junie

Goose vs JetBrains AI / JunieComparisonUpdated 2026-03-16

SUMMARY

Goose (CLI) uses text configuration while JetBrains AI / Junie (IDE) uses markdown. They differ on 5 of 11 compared features. Both tools provide AI-assisted development but take different approaches to project configuration.

FEATURE COMPARISON

Feature	Goose	JetBrains AI / Junie	Notes
Config format	text	markdown
Hierarchy support	✓	✗	Whether config files can be placed at multiple directory levels
Global config	✓	✗	User-wide configuration outside any project
Project config	✓	✓
Subdirectory scoping	✗	✗	Config files in subdirectories that apply only to that subtree
File inclusion / imports	✗	✗	Ability to include or reference other files from config
Ignore file	✗	.aiignore
IDE integration	CLI	✓
Schema / structure	Free-form (Markdown)	Free-form (Markdown)	Whether config uses structured schema or free-form content
Git committed	✓	✓	Whether primary config files are intended to be version-controlled
Encoding	UTF-8	UTF-8

FILE MAPPING

Purpose	Goose	JetBrains AI / Junie
Settings / configuration	config.yaml	.noai

SIDE-BY-SIDE CODE SAMPLES

Goose

.goosehints

text

This is a Ruby on Rails 7.2 application with Hotwire/Turbo.

Database: PostgreSQL 16
Ruby version: 3.3.x
Node: 22.x (for asset pipeline)

Key commands:
- bin/rails server — start dev server
- bin/rails test — run test suite
- bin/rails db:migrate — run migrations

Conventions:
- Use ViewComponents for reusable UI
- Stimulus controllers for JS behavior
- System tests with Capybara + Playwright
- RuboCop for linting (run: bundle exec rubocop)

JetBrains AI / Junie

.aiassistant/rules/*.md

markdown

# Kotlin Conventions

## Language Features
- Use Kotlin 2.x with coroutines for async work
- Prefer data classes for DTOs and value objects
- Use sealed classes/interfaces for domain errors
- Extension functions over utility classes

## Spring Boot
- Constructor injection (no field injection)
- Use @ConfigurationProperties over @Value
- Prefer WebFlux for reactive endpoints
- Use Spring Security with method-level security

## Testing
- JUnit 5 with Kotest assertions
- MockK for mocking (not Mockito)
- Testcontainers for integration tests
- Use @Nested for test organization

KEY DIFFERENCES

1. Config format

Goose: text. JetBrains AI / Junie: markdown.

2. Hierarchy support

Goose: Supported. JetBrains AI / Junie: Not supported.

3. Global config

Goose: Supported. JetBrains AI / Junie: Not supported.

4. Ignore file

Goose: Not supported. JetBrains AI / Junie: .aiignore.

5. IDE integration

Goose: CLI. JetBrains AI / Junie: Supported.

WHICH SHOULD I USE?

Recommendation

Choose based on your IDE/CLI preference. If you use Goose, configure config.yaml. If you use JetBrains AI / Junie, configure .aiassistant/rules/*.md. Many projects include config files for multiple tools so each team member can use their preferred editor.

PORTABILITY TIP

sync-instructions.sh

bash

# Maintain a single source of truth:
cp AI-INSTRUCTIONS.md CLAUDE.md
cp AI-INSTRUCTIONS.md .cursorrules
cp AI-INSTRUCTIONS.md AGENTS.md