agent-crdt-synchronizer

currentValue ) { this . payload . set ( node , otherValue ) ; changed = true ; } } if ( changed ) { this . notifyUpdate ( { type : 'MERGE' , mergedFrom : otherState } ) ; } } // Compare with another state compare ( otherState ) { for ( const [ node , otherValue ] of otherState . payload ) { const currentValue = this . payload . get ( node ) || 0 ; if ( currentValue < otherValue ) { return 'LESS_THAN' ; } else if ( currentValue

otherValue ) { return 'GREATER_THAN' ; } } return 'EQUAL' ; } // Clone current state clone ( ) { const newCounter = new GCounter ( this . nodeId , this . replicationGroup ) ; newCounter . payload = new Map ( this . payload ) ; return newCounter ; } onUpdate ( callback ) { this . updateCallbacks . push ( callback ) ; } notifyUpdate ( delta ) { this . updateCallbacks . forEach ( callback => callback ( delta ) ) ; } } OR-Set Implementation class ORSet { constructor ( nodeId , initialState = null ) { this . nodeId = nodeId ; this . elements = new Map ( ) ; // element -> Set of unique tags this . tombstones = new Set ( ) ; // removed element tags this . tagCounter = 0 ; if ( initialState ) { this . merge ( initialState ) ; } this . updateCallbacks = [ ] ; } // Add element to set add ( element ) { const tag = this . generateUniqueTag ( ) ; if ( ! this . elements . has ( element ) ) { this . elements . set ( element , new Set ( ) ) ; } this . elements . get ( element ) . add ( tag ) ; this . notifyUpdate ( { type : 'ADD' , element : element , tag : tag } ) ; return tag ; } // Remove element from set remove ( element ) { if ( ! this . elements . has ( element ) ) { return false ; // Element not present } const tags = this . elements . get ( element ) ; const removedTags = [ ] ; // Add all tags to tombstones for ( const tag of tags ) { this . tombstones . add ( tag ) ; removedTags . push ( tag ) ; } this . notifyUpdate ( { type : 'REMOVE' , element : element , removedTags : removedTags } ) ; return true ; } // Check if element is in set has ( element ) { if ( ! this . elements . has ( element ) ) { return false ; } const tags = this . elements . get ( element ) ; // Element is present if it has at least one non-tombstoned tag for ( const tag of tags ) { if ( ! this . tombstones . has ( tag ) ) { return true ; } } return false ; } // Get all elements in set values ( ) { const result = new Set ( ) ; for ( const [ element , tags ] of this . elements ) { // Include element if it has at least one non-tombstoned tag for ( const tag of tags ) { if ( ! this . tombstones . has ( tag ) ) { result . add ( element ) ; break ; } } } return result ; } // Merge with another OR-Set merge ( otherState ) { let changed = false ; // Merge elements and their tags for ( const [ element , otherTags ] of otherState . elements ) { if ( ! this . elements . has ( element ) ) { this . elements . set ( element , new Set ( ) ) ; } const currentTags = this . elements . get ( element ) ; for ( const tag of otherTags ) { if ( ! currentTags . has ( tag ) ) { currentTags . add ( tag ) ; changed = true ; } } } // Merge tombstones for ( const tombstone of otherState . tombstones ) { if ( ! this . tombstones . has ( tombstone ) ) { this . tombstones . add ( tombstone ) ; changed = true ; } } if ( changed ) { this . notifyUpdate ( { type : 'MERGE' , mergedFrom : otherState } ) ; } } generateUniqueTag ( ) { return ${ this . nodeId } - ${ Date . now ( ) } - ${ ++ this . tagCounter } ; } onUpdate ( callback ) { this . updateCallbacks . push ( callback ) ; } notifyUpdate ( delta ) { this . updateCallbacks . forEach ( callback => callback ( delta ) ) ; } } LWW-Register Implementation class LWWRegister { constructor ( nodeId , initialValue = null ) { this . nodeId = nodeId ; this . value = initialValue ; this . timestamp = initialValue ? Date . now ( ) : 0 ; this . vectorClock = new VectorClock ( nodeId ) ; this . updateCallbacks = [ ] ; } // Set new value with timestamp set ( newValue , timestamp = null ) { const ts = timestamp || Date . now ( ) ; if ( ts

this . timestamp || ( ts === this . timestamp && this . nodeId

this . getLastWriter ( ) ) ) { const oldValue = this . value ; this . value = newValue ; this . timestamp = ts ; this . vectorClock . increment ( ) ; this . notifyUpdate ( { type : 'SET' , oldValue : oldValue , newValue : newValue , timestamp : ts } ) ; } } // Get current value get ( ) { return this . value ; } // Merge with another LWW-Register merge ( otherRegister ) { if ( otherRegister . timestamp

this . timestamp || ( otherRegister . timestamp === this . timestamp && otherRegister . nodeId

this . nodeId ) ) { const oldValue = this . value ; this . value = otherRegister . value ; this . timestamp = otherRegister . timestamp ; this . notifyUpdate ( { type : 'MERGE' , oldValue : oldValue , newValue : this . value , mergedFrom : otherRegister } ) ; } // Merge vector clocks this . vectorClock . merge ( otherRegister . vectorClock ) ; } getLastWriter ( ) { // In real implementation, this would track the actual writer return this . nodeId ; } onUpdate ( callback ) { this . updateCallbacks . push ( callback ) ; } notifyUpdate ( delta ) { this . updateCallbacks . forEach ( callback => callback ( delta ) ) ; } } RGA (Replicated Growable Array) Implementation class RGA { constructor ( nodeId , initialSequence = [ ] ) { this . nodeId = nodeId ; this . sequence = [ ] ; this . tombstones = new Set ( ) ; this . vertexCounter = 0 ; // Initialize with sequence for ( const element of initialSequence ) { this . insert ( this . sequence . length , element ) ; } this . updateCallbacks = [ ] ; } // Insert element at position insert ( position , element ) { const vertex = this . createVertex ( element , position ) ; // Find insertion point based on causal ordering const insertionIndex = this . findInsertionIndex ( vertex , position ) ; this . sequence . splice ( insertionIndex , 0 , vertex ) ; this . notifyUpdate ( { type : 'INSERT' , position : insertionIndex , element : element , vertex : vertex } ) ; return vertex . id ; } // Remove element at position remove ( position ) { if ( position < 0 || position = this . visibleLength ( ) ) { throw new Error ( 'Position out of bounds' ) ; } const visibleVertex = this . getVisibleVertex ( position ) ; if ( visibleVertex ) { this . tombstones . add ( visibleVertex . id ) ; this . notifyUpdate ( { type : 'REMOVE' , position : position , vertex : visibleVertex } ) ; return true ; } return false ; } // Get visible elements (non-tombstoned) toArray ( ) { return this . sequence . filter ( vertex => ! this . tombstones . has ( vertex . id ) ) . map ( vertex => vertex . element ) ; } // Get visible length visibleLength ( ) { return this . sequence . filter ( vertex => ! this . tombstones . has ( vertex . id ) ) . length ; } // Merge with another RGA merge ( otherRGA ) { let changed = false ; // Merge sequences const mergedSequence = this . mergeSequences ( this . sequence , otherRGA . sequence ) ; if ( mergedSequence . length !== this . sequence . length ) { this . sequence = mergedSequence ; changed = true ; } // Merge tombstones for ( const tombstone of otherRGA . tombstones ) { if ( ! this . tombstones . has ( tombstone ) ) { this . tombstones . add ( tombstone ) ; changed = true ; } } if ( changed ) { this . notifyUpdate ( { type : 'MERGE' , mergedFrom : otherRGA } ) ; } } createVertex ( element , position ) { const leftVertex = position

0 ? this . getVisibleVertex ( position - 1 ) : null ; return { id : ${ this . nodeId } - ${ ++ this . vertexCounter } , element : element , leftOrigin : leftVertex ? leftVertex . id : null , timestamp : Date . now ( ) , nodeId : this . nodeId } ; } findInsertionIndex ( vertex , targetPosition ) { // Simplified insertion logic - in practice would use more sophisticated // causal ordering based on left origins and vector clocks let visibleCount = 0 ; for ( let i = 0 ; i < this . sequence . length ; i ++ ) { if ( ! this . tombstones . has ( this . sequence [ i ] . id ) ) { if ( visibleCount === targetPosition ) { return i ; } visibleCount ++ ; } } return this . sequence . length ; } getVisibleVertex ( position ) { let visibleCount = 0 ; for ( const vertex of this . sequence ) { if ( ! this . tombstones . has ( vertex . id ) ) { if ( visibleCount === position ) { return vertex ; } visibleCount ++ ; } } return null ; } mergeSequences ( seq1 , seq2 ) { // Simplified merge - real implementation would use topological sort // based on causal dependencies const merged = [ ... seq1 ] ; for ( const vertex of seq2 ) { if ( ! merged . find ( v => v . id === vertex . id ) ) { merged . push ( vertex ) ; } } // Sort by timestamp for basic ordering return merged . sort ( ( a , b ) => a . timestamp - b . timestamp ) ; } onUpdate ( callback ) { this . updateCallbacks . push ( callback ) ; } notifyUpdate ( delta ) { this . updateCallbacks . forEach ( callback => callback ( delta ) ) ; } } Delta-State CRDT Framework class DeltaStateCRDT { constructor ( baseCRDT ) { this . baseCRDT = baseCRDT ; this . deltaBuffer = [ ] ; this . lastSyncVector = new Map ( ) ; this . maxDeltaBuffer = 1000 ; } // Apply operation and track delta applyOperation ( operation ) { const oldState = this . baseCRDT . clone ( ) ; const result = this . baseCRDT . applyOperation ( operation ) ; const newState = this . baseCRDT . clone ( ) ; // Compute delta const delta = this . computeDelta ( oldState , newState ) ; this . addDelta ( delta ) ; return result ; } // Add delta to buffer addDelta ( delta ) { this . deltaBuffer . push ( { delta : delta , timestamp : Date . now ( ) , vectorClock : this . baseCRDT . vectorClock . clone ( ) } ) ; // Maintain buffer size if ( this . deltaBuffer . length

this . maxDeltaBuffer ) { this . deltaBuffer . shift ( ) ; } } // Get deltas since last sync with peer getDeltasSince ( peerNode ) { const lastSync = this . lastSyncVector . get ( peerNode ) || new VectorClock ( ) ; return this . deltaBuffer . filter ( deltaEntry => deltaEntry . vectorClock . isAfter ( lastSync ) ) ; } // Apply received deltas applyDeltas ( deltas ) { const sortedDeltas = this . sortDeltasByCausalOrder ( deltas ) ; for ( const delta of sortedDeltas ) { this . baseCRDT . merge ( delta . delta ) ; } } // Compute delta between two states computeDelta ( oldState , newState ) { // Implementation depends on specific CRDT type // This is a simplified version return { type : 'STATE_DELTA' , changes : this . compareStates ( oldState , newState ) } ; } sortDeltasByCausalOrder ( deltas ) { // Sort deltas to respect causal ordering return deltas . sort ( ( a , b ) => { if ( a . vectorClock . isBefore ( b . vectorClock ) ) return - 1 ; if ( b . vectorClock . isBefore ( a . vectorClock ) ) return 1 ; return 0 ; } ) ; } // Garbage collection for old deltas garbageCollectDeltas ( ) { const cutoffTime = Date . now ( ) - ( 24 * 60 * 60 * 1000 ) ; // 24 hours this . deltaBuffer = this . deltaBuffer . filter ( deltaEntry => deltaEntry . timestamp

cutoffTime ) ; } } MCP Integration Hooks Memory Coordination for CRDT State // Store CRDT state persistently await this . mcpTools . memory_usage ( { action : 'store' , key : crdt_state_ ${ this . crdtName } , value : JSON . stringify ( { type : this . crdtType , state : this . serializeState ( ) , vectorClock : Array . from ( this . vectorClock . entries ( ) ) , lastSync : Array . from ( this . lastSyncVector . entries ( ) ) } ) , namespace : 'crdt_synchronization' , ttl : 0 // Persistent } ) ; // Coordinate delta synchronization await this . mcpTools . memory_usage ( { action : 'store' , key : deltas_ ${ this . nodeId } _ ${ Date . now ( ) } , value : JSON . stringify ( this . getDeltasSince ( null ) ) , namespace : 'crdt_deltas' , ttl : 86400000 // 24 hours } ) ; Performance Monitoring // Track CRDT synchronization metrics await this . mcpTools . metrics_collect ( { components : [ 'crdt_merge_time' , 'delta_generation_time' , 'sync_convergence_time' , 'memory_usage_per_crdt' ] } ) ; // Neural pattern learning for sync optimization await this . mcpTools . neural_patterns ( { action : 'learn' , operation : 'crdt_sync_optimization' , outcome : JSON . stringify ( { syncPattern : this . lastSyncPattern , convergenceTime : this . lastConvergenceTime , networkTopology : this . networkState } ) } ) ; Advanced CRDT Features Causal Consistency Tracker class CausalTracker { constructor ( nodeId ) { this . nodeId = nodeId ; this . vectorClock = new VectorClock ( nodeId ) ; this . causalBuffer = new Map ( ) ; this . deliveredEvents = new Set ( ) ; } // Track causal dependencies trackEvent ( event ) { event . vectorClock = this . vectorClock . clone ( ) ; this . vectorClock . increment ( ) ; // Check if event can be delivered if ( this . canDeliver ( event ) ) { this . deliverEvent ( event ) ; this . checkBufferedEvents ( ) ; } else { this . bufferEvent ( event ) ; } } canDeliver ( event ) { // Event can be delivered if all its causal dependencies are satisfied for ( const [ nodeId , clock ] of event . vectorClock . entries ( ) ) { if ( nodeId === event . originNode ) { // Origin node's clock should be exactly one more than current if ( clock !== this . vectorClock . get ( nodeId ) + 1 ) { return false ; } } else { // Other nodes' clocks should not exceed current if ( clock

this . vectorClock . get ( nodeId ) ) { return false ; } } } return true ; } deliverEvent ( event ) { if ( ! this . deliveredEvents . has ( event . id ) ) { // Update vector clock this . vectorClock . merge ( event . vectorClock ) ; // Mark as delivered this . deliveredEvents . add ( event . id ) ; // Apply event to CRDT this . applyCRDTOperation ( event ) ; } } bufferEvent ( event ) { if ( ! this . causalBuffer . has ( event . id ) ) { this . causalBuffer . set ( event . id , event ) ; } } checkBufferedEvents ( ) { const deliverable = [ ] ; for ( const [ eventId , event ] of this . causalBuffer ) { if ( this . canDeliver ( event ) ) { deliverable . push ( event ) ; } } // Deliver events in causal order for ( const event of deliverable ) { this . causalBuffer . delete ( event . id ) ; this . deliverEvent ( event ) ; } } } CRDT Composition Framework class CRDTComposer { constructor ( ) { this . compositeTypes = new Map ( ) ; this . transformations = new Map ( ) ; } // Define composite CRDT structure defineComposite ( name , schema ) { this . compositeTypes . set ( name , { schema : schema , factory : ( nodeId , replicationGroup ) => this . createComposite ( schema , nodeId , replicationGroup ) } ) ; } createComposite ( schema , nodeId , replicationGroup ) { const composite = new CompositeCRDT ( nodeId , replicationGroup ) ; for ( const [ fieldName , fieldSpec ] of Object . entries ( schema ) ) { const fieldCRDT = this . createFieldCRDT ( fieldSpec , nodeId , replicationGroup ) ; composite . addField ( fieldName , fieldCRDT ) ; } return composite ; } createFieldCRDT ( fieldSpec , nodeId , replicationGroup ) { switch ( fieldSpec . type ) { case 'counter' : return fieldSpec . decrements ? new PNCounter ( nodeId , replicationGroup ) : new GCounter ( nodeId , replicationGroup ) ; case 'set' : return new ORSet ( nodeId ) ; case 'register' : return new LWWRegister ( nodeId ) ; case 'map' : return new ORMap ( nodeId , replicationGroup , fieldSpec . valueType ) ; case 'sequence' : return new RGA ( nodeId ) ; default : throw new Error ( Unknown CRDT field type: ${ fieldSpec . type } ) ; } } } class CompositeCRDT { constructor ( nodeId , replicationGroup ) { this . nodeId = nodeId ; this . replicationGroup = replicationGroup ; this . fields = new Map ( ) ; this . updateCallbacks = [ ] ; } addField ( name , crdt ) { this . fields . set ( name , crdt ) ; // Subscribe to field updates crdt . onUpdate ( ( delta ) => { this . notifyUpdate ( { type : 'FIELD_UPDATE' , field : name , delta : delta } ) ; } ) ; } getField ( name ) { return this . fields . get ( name ) ; } merge ( otherComposite ) { let changed = false ; for ( const [ fieldName , fieldCRDT ] of this . fields ) { const otherField = otherComposite . fields . get ( fieldName ) ; if ( otherField ) { const oldState = fieldCRDT . clone ( ) ; fieldCRDT . merge ( otherField ) ; if ( ! this . statesEqual ( oldState , fieldCRDT ) ) { changed = true ; } } } if ( changed ) { this . notifyUpdate ( { type : 'COMPOSITE_MERGE' , mergedFrom : otherComposite } ) ; } } serialize ( ) { const serialized = { } ; for ( const [ fieldName , fieldCRDT ] of this . fields ) { serialized [ fieldName ] = fieldCRDT . serialize ( ) ; } return serialized ; } onUpdate ( callback ) { this . updateCallbacks . push ( callback ) ; } notifyUpdate ( delta ) { this . updateCallbacks . forEach ( callback => callback ( delta ) ) ; } } Integration with Consensus Protocols CRDT-Enhanced Consensus class CRDTConsensusIntegrator { constructor ( consensusProtocol , crdtSynchronizer ) { this . consensus = consensusProtocol ; this . crdt = crdtSynchronizer ; this . hybridOperations = new Map ( ) ; } // Hybrid operation: consensus for ordering, CRDT for state async hybridUpdate ( operation ) { // Step 1: Achieve consensus on operation ordering const consensusResult = await this . consensus . propose ( { type : 'CRDT_OPERATION' , operation : operation , timestamp : Date . now ( ) } ) ; if ( consensusResult . committed ) { // Step 2: Apply operation to CRDT with consensus-determined order const orderedOperation = { ... operation , consensusIndex : consensusResult . index , globalTimestamp : consensusResult . timestamp } ; await this . crdt . applyOrderedOperation ( orderedOperation ) ; return { success : true , consensusIndex : consensusResult . index , crdtState : this . crdt . getCurrentState ( ) } ; } return { success : false , reason : 'Consensus failed' } ; } // Optimized read operations using CRDT without consensus async optimisticRead ( key ) { return this . crdt . read ( key ) ; } // Strong consistency read requiring consensus verification async strongRead ( key ) { // Verify current CRDT state against consensus const consensusState = await this . consensus . getCommittedState ( ) ; const crdtState = this . crdt . getCurrentState ( ) ; if ( this . statesConsistent ( consensusState , crdtState ) ) { return this . crdt . read ( key ) ; } else { // Reconcile states before read await this . reconcileStates ( consensusState , crdtState ) ; return this . crdt . read ( key ) ; } } } This CRDT Synchronizer provides comprehensive support for conflict-free replicated data types, enabling eventually consistent distributed state management that complements consensus protocols for different consistency requirements.