@knowall-ai/mcp-neo4j-agent-memory/build/deduplication.js

Graph-based memory system for AI agents. Store people, places, organizations as nodes. Build semantic relationships (KNOWS, WORKS_AT, CREATED). Word-tokenized search finds partial matches. Filter by date, traverse relationships, maintain temporal context.

// Enhanced remember function with deduplication
async function enhancedRemember(args) {
    const { type, content, details } = args;
    // First, check if this entity already exists
    const label = type.charAt(0).toUpperCase() + type.slice(1);
    const checkQuery = `
    MATCH (n:${label} {content: $content})
    RETURN n, id(n) as id
    LIMIT 1
  `;
    const existing = await this.neo4j.executeQuery(checkQuery, { content });
    if (existing.length > 0) {
        // Entity exists - update it with new details
        const updateQuery = `
      MATCH (n:${label} {content: $content})
      SET n += $properties
      SET n.updated_at = datetime()
      RETURN n
    `;
        const properties = parseDetails(details);
        const result = await this.neo4j.executeQuery(updateQuery, {
            content,
            properties
        });
        return {
            action: 'updated',
            node: result[0].n,
            message: `Updated existing ${type}: ${content}`
        };
    }
    else {
        // Create new node
        const properties = parseDetails(details);
        properties.content = content;
        properties.type = type;
        properties.created_at = new Date().toISOString();
        const result = await this.neo4j.createNode(label, properties);
        return {
            action: 'created',
            node: result,
            message: `Created new ${type}: ${content}`
        };
    }
}
// Alternative: Create a merge operation
async function mergeMemory(args) {
    const { type, content, details } = args;
    const label = type.charAt(0).toUpperCase() + type.slice(1);
    const properties = parseDetails(details);
    // Use MERGE to create or match existing
    const mergeQuery = `
    MERGE (n:${label} {content: $content})
    ON CREATE SET n += $createProps, n.created_at = datetime()
    ON MATCH SET n += $updateProps, n.updated_at = datetime()
    RETURN n, 
           CASE WHEN n.created_at = n.updated_at THEN 'created' ELSE 'updated' END as action
  `;
    const result = await this.neo4j.executeQuery(mergeQuery, {
        content,
        createProps: { ...properties, type },
        updateProps: properties
    });
    return {
        action: result[0].action,
        node: result[0].n
    };
}
export {};