Add comprehensive Synapify documentation

Document planned features for the visual RIDDL editor:
- Visual and textual editing modes
- Automatic diagram generation (context maps, entity diagrams, etc.)
- AI integration via MCP Server
- Model simulation capabilities
- Code generation (coming soon)
- Getting started guide and requirements

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: respencer-ncl

docs/synapify/index.md

@@ -1,3 +1,152 @@
 # Synapify
 
-Synapify is the editor for creating system models based on [RIDDL](../riddl/index.md) 
+Synapify is the visual editing interface for creating and managing
+[RIDDL](../riddl/index.md) domain models. It combines powerful editing
+capabilities with AI assistance to streamline your model development
+workflow.
+
+!!! warning "Coming Soon"
+    Synapify is currently in active development. Features described below
+    represent the planned capabilities. Check back for updates on
+    availability.
+
+---
+
+## Overview
+
+Synapify provides a complete environment for domain modeling with RIDDL:
+
+- **Visual and Textual Editing** - Switch between graphical diagrams and
+  source code views
+- **Automatic Diagram Generation** - Visualize your model structure
+  automatically
+- **AI-Powered Assistance** - Integrated with your AI and Ossum's MCP Server
+- **Model Simulation** - Request simulations to validate model behavior
+- **Code Generation** - Generate implementation code from your models (coming
+  soon)
+
+---
+
+## Editing Modes
+
+### Graphical View
+
+Visualize your domain model as interactive diagrams:
+
+- **Domain hierarchy** - See contexts, entities, and their relationships
+- **Message flows** - Trace commands, events, and queries between components
+- **Type structures** - View aggregations and type definitions graphically
+- **Drag-and-drop editing** - Modify your model visually
+
+### Textual View
+
+Full-featured RIDDL source editor:
+
+- **Syntax highlighting** - Clear visual distinction of language elements
+- **Real-time validation** - Immediate feedback on errors and warnings
+- **Code completion** - Intelligent suggestions as you type
+- **Synchronized views** - Changes in text update diagrams automatically
+
+---
+
+## Diagram Generation
+
+Synapify automatically generates diagrams from your RIDDL model:
+
+| Diagram Type | Shows |
+|--------------|-------|
+| **Context Map** | Bounded contexts and their relationships |
+| **Entity Diagram** | Entities, their state, and message handlers |
+| **Message Flow** | How messages move between components |
+| **Type Hierarchy** | Type definitions and their relationships |
+| **Saga Workflow** | Multi-step process coordination flows |
+
+Diagrams update in real-time as you edit your model.
+
+---
+
+## AI Integration
+
+Synapify integrates with AI assistants through Ossum's
+[MCP Server](../MCP/index.md) to provide intelligent modeling support:
+
+### Capabilities
+
+- **Validate models** - Get detailed feedback on errors and warnings
+- **Check completeness** - Identify missing elements in your model
+- **Generate suggestions** - Receive recommendations for what to add next
+- **Explain errors** - Understand validation issues with fix suggestions
+- **Convert descriptions** - Transform natural language into RIDDL structures
+
+### How It Works
+
+1. Connect your preferred AI assistant (Claude, Gemini, Copilot, etc.)
+2. Configure the RIDDL MCP Server connection
+3. Ask questions or request assistance directly in Synapify
+4. AI responses include proper RIDDL syntax ready to insert
+
+---
+
+## Model Simulation
+
+Request simulations to validate your model's behavior before implementation:
+
+- **Behavioral validation** - Verify handlers respond correctly to messages
+- **State transitions** - Confirm entities move through expected states
+- **Saga coordination** - Test multi-step process flows
+- **Edge cases** - Explore boundary conditions and error scenarios
+
+Simulation results help you refine your model before committing to code.
+
+---
+
+## Code Generation
+
+*Coming soon*
+
+Generate implementation code from your validated RIDDL models:
+
+- Target multiple languages and frameworks
+- Produce type-safe message definitions
+- Create entity implementations with handlers
+- Generate API endpoints and documentation
+
+---
+
+## Getting Started
+
+When Synapify becomes available:
+
+1. Download and install Synapify
+2. Create or open a RIDDL project
+3. Connect to the MCP Server for AI assistance
+4. Start modeling with visual or textual editing
+5. Generate diagrams to visualize your design
+6. Run simulations to validate behavior
+
+---
+
+## Requirements
+
+- **Platform**: macOS, Windows, Linux
+- **MCP Server**: For AI integration features
+- **Network**: For simulation and code generation services
+
+---
+
+## Stay Updated
+
+Synapify is under active development. For updates:
+
+- **Lined In**: Follow us here: https://www.linkedin.com/company/ossum-inc/
+- **Email**: Ask a question here: support@ossuminc.com
+- **List**: Join email list here: https://www.ossuminc.com/ (scroll down)
+- **GitHub**: Developers: [github.com/ossuminc](https://github.com/ossuminc)
+
+---
+
+## Related Documentation
+
+- [RIDDL Language Reference](../riddl/references/language-reference.md)
+- [Authoring RIDDL Sources](../OSS/authoring-riddl.md)
+- [MCP Server Integration](../MCP/index.md)