code-atlas

name	code-atlas
description	Generates architectural diagrams (PlantUML, Mermaid) for the Java project using the Code Atlas Gradle plugin. Use when you need to visualize the codebase structure, class relationships, or package dependencies.

Code Atlas

Overview

This skill utilizes the io.github.euledge.code-atlas Gradle plugin to automatically generate architectural diagrams from compiled Java bytecode. It supports PlantUML and Mermaid formats.

Core Mandate

• NEVER modify build.gradle to change diagram settings.
• ALWAYS use command-line options (e.g., --rootPackages, --formats) to specify or override configuration.
• ENSURE the project is built (./gradlew classes) before generating diagrams, as the plugin analyzes bytecode.

Capabilities

1. Help & Discovery

To see all available options directly from the plugin:

./gradlew help --task generateDiagrams

2. Generate Diagrams

Use the generateDiagrams task with command-line options.

Available Options:

• --formats: plantuml, mermaid (comma-separated, default: plantuml).
• --outputDir: Directory path for output files (default: docs/diagrams).
• --rootPackages: Package prefixes to include (e.g., com.example.domain).
• --showDetails: true or false (default: true). Set to false for a simplified overview without fields/methods.
• --stripPackagePrefix: Removes prefix from class names for cleaner diagrams (e.g., com.example).
• --groupByPackage: true or false (default: true). Groups classes into package blocks.

Example (Simplified Mermaid Diagram):

./gradlew generateDiagrams --rootPackages=com.example.ordertable --formats=mermaid --showDetails=false --stripPackagePrefix=com.example

Workflow

1. Build Project: Run ./gradlew classes to ensure bytecode is up-to-date.
2. Identify Scope: Determine the package or context to visualize.
3. Execute Task: Run ./gradlew generateDiagrams with desired options.
4. Verify: Check the outputDir (default docs/diagrams) for generated .puml or .mmd files.

Troubleshooting

• No classes found: Run ./gradlew classes first.
• Diagram too complex: Use --showDetails=false and --rootPackages to narrow the scope.
• Verbose output: Run with --info to see which classes are being analyzed.

Example Instructions / 指示の例

• "Generate class diagrams for the user context using Mermaid." （Mermaidを使って user コンテキストのクラス図を生成して。）
• "Create a simplified diagram of the com.example.domain package, excluding detailed fields/methods." （com.example.domain パッケージの簡略化した図を作成して。詳細なフィールドやメソッドは除外して。）
• "Run the help task for generateDiagrams to show available options." （generateDiagramsのヘルプタスクを実行して利用可能なオプションを表示して。）