Architecture

Eclipse Peon AI follows the Eclipse RCP / e4 application model.

Module Structure

llm-peon/
├── pom.xml                         # Parent POM with Tycho configuration
├── org.sterl.llmpeon/              # Main Eclipse plugin (e4)
│   └── src/org/sterl/llmpeon/
│       ├── parts/                  # UI components
│       │   ├── AIChatView.java     # Main chat view
│       │   ├── widget/             # SWT widgets
│       │   ├── tools/              # LLM tools
│       │   └── config/             # Preferences
│       └── ...
├── org.sterl.llmpeon.core/         # Standalone Maven JAR (non-OSGi)
├── org.sterl.llmpeon.test/         # Test module for core library
├── releng/
│   ├── llmpeon-target/             # Target platform (Eclipse 2025-12)
│   ├── llmpeon-feature/           # Eclipse feature
│   └── llmpeon-update-site/       # p2 repository
└── doc/                           # Documentation

Projects Overview

Project	Type	Purpose
llmpeon-parent	Maven Parent POM	Build configuration root with Tycho setup
org.sterl.llmpeon.core	Java/Maven JAR	Non-OSGi core library (pure Java)
org.sterl.llmpeon	PDE Plugin Bundle	Main Eclipse RCP/e4 plugin with UI components
org.sterl.llmpeon.test	Test Project	EPL-qualified test module for llmpeon-core using JUnit 5

Technology Stack

• Eclipse RCP / e4: Pure e4 application model
• Java 21: Modern Java features
• Maven + Tycho: Build system for Eclipse plugins
• LangChain4j: LLM integration framework
• JUnit 5: Testing framework for core module validation

UI Components

Chat View

The main view implemented as an e4 Part with SWT controls.

Chat Widget

Custom SWT widget for displaying chat messages with markdown support.

Tools

LLM-powered tools that can interact with the Eclipse workspace:

• File reading/writing
• Search
• Context awareness

Dependency Management

Third-party libraries are embedded via Bundle-ClassPath into the lib/ folder. The target platform provides OSGi, SWT, JFace, and other Eclipse runtime components.