SynchroFlux

SynchroFlux is a high-performance, production-ready state synchronization engine for real-time web applications.

Unlike traditional WebSocket wrappers that sync raw data, SynchroFlux is an Event-Sourced Replication Protocol that ensures causal consistency, handles offline-first scenarios, and manages conflict resolution deterministically across distributed clients.

✨ Features

• 🧠 Causal Consistency: Uses Vector Clocks to ensure events are applied in the correct order, even with network latency.
• ⚡ O(log n) Performance: Incremental event insertion and state snapshotting for constant-time UI updates.
• 📡 Transport Agnostic: Pluggable layer for WebSockets, SSE, or HTTP Polling.
• 🔌 Durable Persistence: Built-in hooks for SQL/NoSQL backends (Postgres schema included).
• 📶 Offline-First: Automatic event buffering and re-syncing with conflict resolution.
• 🛡️ Operational Ready: Integrated backpressure, garbage collection, and event validation.

🤖 AI-Powered Integration (MCP)

SynchroFlux comes with a built-in Model Context Protocol (MCP) server. This allows AI assistants (like Claude, Cursor, or ChatGPT) to automatically integrate the library into your codebase.

1. Enable the MCP Server

Add SynchroFlux to your AI assistant's configuration:

{
  "mcpServers": {
    "synchroflux": {
      "command": "npx",
      "args": ["-y", "synchroflux", "mcp"]
    }
  }
}

2. Automate Integration

Once connected, you can simply ask your AI:

• "Integrate SynchroFlux into my current React app"
• "Set up a synchronized backend for my Jira-like board"
• "Sync-enable the CustomerDashboard component"

📦 Installation

npm install synchroflux

🚀 Quick Start

1. Define your State and Reducer

import { SyncEvent } from 'synchroflux';

const initialState = { tickets: [] };

function boardReducer(state, event: SyncEvent) {
  switch (event.type) {
    case 'ADD_TICKET':
      return { ...state, tickets: [...state.tickets, event.payload] };
    default:
      return state;
  }
}

2. Initialize the Engine

import { SyncEngine, MockTransport } from 'synchroflux';

const sync = new SyncEngine({
  clientId: 'user-123',
  initialState,
  reducer: boardReducer,
  transport: new MockTransport(), // Use WebSocketTransport in production
});

await sync.connect();

3. Mutate and Subscribe

// Subscribe to specific topics
sync.subscribe('board:updates', (state) => {
  console.log('New State:', state);
});

// Mutate state (Optimistic Update)
sync.mutate('ADD_TICKET', { id: 't1', title: 'Fix Bug' });

🛠️ Advanced Usage

Causal Dependencies

Ensure a "Reply" never arrives before the "Original Post":

sync.mutate('REPLY', { text: 'I agree!' }, ['original-post-id']);

Custom Conflict Resolution

Override the default LWW (Last-Write-Wins) strategy:

const sync = new SyncEngine({
  // ...
  conflictResolver: (baseState, conflictingEvents) => {
    // Implement your own merge logic or CRDT
    return customMerge(baseState, conflictingEvents);
  }
});

Durable Persistence (Server-side)

Connect SynchroFlux to your Postgres database:

import { SqlPersistence } from 'synchroflux';

const sync = new SyncEngine({
  // ...
  persistence: new SqlPersistence('postgres://localhost:5432/mydb'),
});

📂 Architecture

SynchroFlux is built on four core pillars:

1. EventLog: A causally-ordered, append-only log of all mutations.
2. SyncEngine: The brain that coordinates transport, persistence, and backpressure.
3. StateResolver: Derives state by replaying logs over snapshots.
4. Transport: A pluggable communication layer.

For a deep dive into the protocol and causal consistency, see ARCHITECTURE.md.

📊 Performance & Scale

• Backpressure: Prevents client memory overflow by throttling mutations if the server lags.
• Snapshotting: Reduces boot time by checkpointing state every 100 events.
• GC: Automatically prunes processed event IDs to maintain a low memory footprint.

📄 License

MIT © 2026 SynchroFlux Team