Context Sync

Product Introduction

1. Context Sync is an MCP (Model Context Protocol) server that maintains persistent AI context across Claude Desktop and Cursor IDE through local-first synchronization. It operates as a background service that captures and stores technical discussions, architectural decisions, and project states to overcome AI context window limitations. The system uses SQLite for local storage and integrates directly with IDE workspaces through file system monitoring.

2. The core value lies in eliminating repetitive context re-explanation to AI assistants by preserving technical memory across sessions and platforms. It enables continuous project understanding through automated context capture, cross-platform synchronization, and granular codebase analysis tools while maintaining full data ownership through 100% local operation.

Main Features

1. Persistent context storage retains conversations, code decisions, and project metadata across all interactions with Claude or Cursor IDE using compressed vector embeddings and relational database tracking. The system automatically indexes chat history, file changes, and git operations to maintain temporal context awareness.

2. Advanced code analysis tools provide dependency mapping through Abstract Syntax Tree (AST) parsing, execution path tracing via call graph analysis, and type definition tracking across TypeScript/JavaScript projects. Developers can query impact analysis for proposed code changes through cross-file reference resolution.

3. Cross-platform synchronization engine detects active development environments (Claude Desktop, Cursor IDE) and maintains shared context through standardized MCP protocol handshakes. The system enables seamless workflow transitions between AI platforms with automatic context versioning and conflict resolution.

Problems Solved

1. Eliminates context window limitations by preserving technical discussions and code decisions beyond standard AI session durations through compressed memory storage and retrieval augmented generation (RAG) techniques. Prevents information loss during platform switches or extended development cycles.

2. Targets full-stack developers working with multiple AI-assisted tools (Claude, Cursor, VS Code) who require consistent project awareness across environments. Particularly benefits remote teams maintaining complex codebases with frequent context switching between documentation, implementation, and debugging tasks.

3. Enables multi-session development scenarios like resuming interrupted workflows after days/weeks, comparing architectural decisions across time periods, and onboarding new team members through preserved historical context. Supports complex code refactoring through dependency impact forecasting.

Unique Advantages

1. Differentiates from cloud-based alternatives through strict local data storage using SQLite encryption and filesystem-based access controls, ensuring no sensitive code or discussions leave the developer's machine. Implements zero-trust architecture for enterprise environments.

2. Introduces novel context compression algorithms that maintain 93% semantic accuracy while reducing memory footprint by 40% compared to standard vector databases. Features real-time workspace monitoring through inotify/FSEvents integration for instant file change detection.

3. Combines IDE-native extension support with standalone server capabilities, offering broader platform compatibility than single-environment solutions. Provides 53 specialized tools for technical context management compared to competitors' average of 15-20 features.

Frequently Asked Questions (FAQ)

1. How does Context Sync handle sensitive codebase information? All data remains local through encrypted SQLite storage at ~/.context-sync/data.db using AES-256-GCM encryption, with automatic key rotation every 90 days. The system never transmits data externally and excludes files matching .gitignore patterns.

2. Why doesn't Claude recognize my active project? Ensure the context-sync server is running via context-sync --status and verify project initialization using init_project command. Check file permissions in ~/.config/Claude/claude_desktop_config.json for proper workspace access rights.

3. How to resolve cross-platform synchronization failures? Run setup_cursor to validate Cursor IDE integration and use get_platform_status to diagnose connection issues. Ensure both Claude and Cursor are using matching v0.4.0+ versions of Context Sync with enabled MCP handshake protocol.