Changelog

✨ New Features

• 4 new documentation pages: Added comprehensive guides for Import & Export Formats, WebSocket Live Monitor, BehaviorTree.CPP Integration, and Robotics Patterns
• Enhanced BTCPP XML export: Improved compatibility with BehaviorTree.CPP v4.x format, including proper port type declarations
• WebSocket event buffering: Editor now buffers last 1000 events for step-back debugging during live monitoring

🐛 Bug Fixes

• Fixed issue where custom node ports were not preserved during round-trip JSON import/export
• Corrected vertical layout mode connection rendering for decorator nodes
• Resolved Safari-specific zoom reset behavior that caused canvas offset drift

📝 Documentation

• Added detailed examples for ROS 2 integration with BT.CPP
• Documented WebSocket message format specification with C++, Python, and Node.js server examples
• Included robotics case studies: warehouse robot, agricultural drone, surgical assistant

✨ New Features

• Multi-language support: Added 6 languages (English, Chinese, Korean, Dutch, Spanish, Portuguese) with automatic detection and persistent preference
• NDJSON log replay: Load execution logs and replay with play/pause/step controls at variable speeds (0.5x–10x)
• Real-time WebSocket monitoring: Connect to remote WebSocket endpoint for live node status visualization
• Subtree collapse/expand: Toggle visibility of child nodes to keep canvas organized for large trees

🎨 UI Improvements

• Redesigned toolbar with grouped actions and overflow menu for small screens
• Added keyboard shortcuts: Ctrl/Cmd+S (save), Ctrl/Cmd+Z (undo), Space+drag (pan)
• Improved theme toggle with smooth transitions between light and dark modes

📚 Documentation

• Created Getting Started tutorial with step-by-step tree building guide
• Added Node Types Reference covering all built-in nodes with usage examples
• Published Reactive Control Patterns essay comparing behavior trees vs. state machines

🐛 Bug Fixes

• Fixed modal z-index stacking issue when multiple dialogs were open
• Corrected port value validation to accept decimal numbers (e.g., 2.5 seconds)
• Resolved mobile viewport scaling issue on iOS Safari

✨ New Features

• XML import/export: Support for generic XML format alongside existing JSON
• BTCPP auto-detection: Automatically detect and parse BehaviorTree.CPP XML format on import
• Custom node library: Users can define reusable node templates with typed ports
• Canvas layout modes: Switch between horizontal and vertical tree layouts

🔧 Technical Improvements

• Migrated from CDN-hosted Drawflow to bundled version for offline reliability
• Implemented localStorage persistence for sidebar category collapse state
• Added structured data (JSON-LD) for better SEO and AI search engine indexing

🐛 Bug Fixes

• Fixed connection line rendering artifacts at high zoom levels (>200%)
• Corrected node deletion behavior to properly cascade and remove orphaned connections

🎉 Initial Release

• Visual behavior tree editor: Drag-and-drop interface built on Drawflow
• Core node types: Composite (Sequence, Selector, Parallel), Action, Condition, Decorator nodes
• JSON import/export: Save and load behavior tree definitions
• Responsive design: Works on desktop and tablet devices
• MIT License: Free and open-source for personal and commercial use

We're actively working on these features for future releases:

• 🔄 Undo/Redo system: Full history management for canvas operations
• 📊 Analytics dashboard: Visualize tree execution statistics (tick counts, success rates)
• 🔗 GitHub integration: Direct save/load from GitHub repositories
• 🧪 Unit test generator: Auto-generate test cases from tree structure
• 🌐 Collaborative editing: Real-time multi-user tree editing via WebRTC
• 📱 Mobile app: Native iOS/Android apps for field-side debugging