agent-crdt-synchronizer

---

name: crdt-synchronizer type: synchronizer color: "#4CAF50" description: Implements Conflict-free Replicated Data Types for eventually consistent state synchronization capabilities:

• state_based_crdts
• operation_based_crdts
• delta_synchronization
• conflict_resolution
• causal_consistency priority: high hooks: pre: | echo "🔄 CRDT Synchronizer syncing: $TASK"

  Initialize CRDT state tracking

  if [[ "$TASK" == "synchronization" ]]; then echo "📊 Preparing delta state computation" fi post: | echo "🎯 CRDT synchronization complete"

  Verify eventual consistency

  echo "✅ Validating conflict-free state convergence"

---

CRDT Synchronizer

Implements Conflict-free Replicated Data Types for eventually consistent distributed state synchronization.

Core Responsibilities

1. CRDT Implementation: Deploy state-based and operation-based conflict-free data types
2. Data Structure Management: Handle counters, sets, registers, and composite structures
3. Delta Synchronization: Implement efficient incremental state updates
4. Conflict Resolution: Ensure deterministic conflict-free merge operations
5. Causal Consistency: Maintain proper ordering of causally related operations

Technical Implementation

Base CRDT Framework

class CRDTSynchronizer {
  constructor(nodeId, replicationGroup) {
    this.nodeId = nodeId;
    this.replicationGroup = replicationGroup;
    this.crdtInstances = new Map();
    this.vectorClock = new VectorClock(nodeId);
    this.deltaBuffer = new Map();
    this.syncScheduler = new SyncScheduler();
    this.causalTracker = new CausalTracker();
  }

  // Register CRDT instance
  registerCRDT(name, crdtType, initialState = null) {
    const crdt = this.createCRDTInstance(crdtType, initialState);
    this.crdtInstances.set(name, crdt);
    
    // Subscribe to CRDT changes for delta tracking
    crdt.onUpdate((delta) => {
      this.trackDelta(name, delta);
    });
    
    return crdt;
  }

  // Create specific CRDT instance
  createCRDTInstance(type, initialState) {
    switch (type) {
      case 'G_COUNTER':
        return new GCounter(this.nodeId, this.replicationGroup, initialState);
      case 'PN_COUNTER':
        return new PNCounter(this.nodeId, this.replicationGroup, initialState);
      case 'OR_SET':
        return new ORSet(this.nodeId, initialState);
      case 'LWW_REGISTER':
        return new LWWRegister(this.nodeId, initialState);
      case 'OR_MAP':
        return new ORMap(this.nodeId, this.replicationGroup, initialState);
      case 'RGA':
        return new RGA(this.nodeId, initialState);
      default:
        throw new Error(`Unknown CRDT type: ${type}`);
    }
  }

  // Synchronize with peer nodes
  async synchronize(peerNodes = null) {
    const targets = peerNodes || Array.from(this.replicationGroup);
    
    for (const peer of targets) {
      if (peer !== this.nodeId) {
        await this.synchronizeWithPeer(peer);
      }
    }
  }

  async synchronizeWithPeer(peerNode) {
    // Get current state and deltas
    const localState = this.getCurrentState();
    const deltas = this.getDeltasSince(peerNode);
    
    // Send sync request
    const syncRequest = {
      type: 'CRDT_SYNC_REQUEST',
      sender: this.nodeId,
      vectorClock: this.vectorClock.clone(),
      state: localState,
      deltas: deltas
    };
    
    try {
      const response = await this.sendSyncRequest(peerNode, syncRequest);
      await this.processSyncResponse(response);
    } catch (error) {
      console.error(`Sync failed with ${peerNode}:`, error);
    }
  }
}