Memory - Agentbase Docs

Memory gives agents the ability to retain and recall information across sessions, enabling personalized interactions, context continuity, and intelligent decision-making based on historical data.

Overview

The Memory primitive empowers agents with persistent storage and retrieval of information across multiple sessions and interactions. Unlike session-based state that exists only within a single conversation, memory provides long-term retention of facts, preferences, conversation history, and learned patterns. Memory is essential for:

Personalization: Remember user preferences, habits, and historical interactions
Context Continuity: Maintain conversation context across multiple sessions
Knowledge Accumulation: Build up domain knowledge over time
Relationship Building: Create more natural, personalized user experiences
Efficient Workflows: Avoid asking users to repeat information
Pattern Recognition: Learn from past interactions to improve future responses

Automatic Storage

Store important information automatically or explicitly during agent execution

Semantic Retrieval

Query memories using natural language with vector-based semantic search

Scoped Memory

Organize memories by user, session, or custom namespaces for multi-tenant applications

Temporal Awareness

Memories include timestamps for time-based retrieval and context

How Memory Works

When you enable memory for an agent:

Storage: Agent stores important facts, preferences, and context during execution
Indexing: Memories are indexed using vector embeddings for semantic search
Retrieval: Agent automatically recalls relevant memories based on current context
Integration: Retrieved memories are injected into agent context for informed responses
Updates: Memories can be updated, deleted, or marked as outdated over time
Scoping: Memories are isolated by namespace (user ID, workspace, etc.)

Privacy & Control: Memories are scoped per user/namespace and can be deleted at any time. Agentbase provides full GDPR compliance for memory management.

Memory Types

User Memory

Store user-specific preferences and information:

// User preferences and facts
{
  type: "user",
  namespace: "user_12345",
  memories: [
    "User prefers concise responses",
    "User's timezone is PST",
    "User works in healthcare industry",
    "User last ordered Product X on 2024-01-15"
  ]
}

Conversation Memory

Maintain conversation context and history:

// Conversation context
{
  type: "conversation",
  namespace: "session_abc123",
  memories: [
    "User asked about pricing on 2024-01-10",
    "User mentioned a bug in the mobile app",
    "Promised to follow up by end of week"
  ]
}

Knowledge Memory

Store domain knowledge and learned information:

// Domain knowledge
{
  type: "knowledge",
  namespace: "company_docs",
  memories: [
    "Company uses AWS for infrastructure",
    "Support hours are 9am-5pm EST",
    "Refund policy is 30 days"
  ]
}

Code Examples

Basic Memory Usage

import { Agentbase } from '@agentbase/sdk';

const agentbase = new Agentbase({
  apiKey: process.env.AGENTBASE_API_KEY
});

// Enable memory for a user
const result = await agentbase.runAgent({
  message: "Remember that I prefer morning meetings and I'm allergic to shellfish",
  memory: {
    namespace: "user_12345",
    enabled: true
  }
});

// Agent automatically stores this information
// Future conversations will recall these preferences

Retrieving Memories

// Agent automatically retrieves relevant memories
const result = await agentbase.runAgent({
  message: "Schedule a meeting with the team",
  memory: {
    namespace: "user_12345",
    enabled: true
  }
});

// Agent recalls "I prefer morning meetings" and suggests morning times

Explicit Memory Storage

// Store specific memories explicitly via API
await agentbase.storeMemory({
  namespace: "user_12345",
  memories: [
    {
      content: "User's favorite color is blue",
      metadata: {
        category: "preferences",
        confidence: 1.0
      }
    },
    {
      content: "User completed onboarding on 2024-01-15",
      metadata: {
        category: "milestones",
        timestamp: "2024-01-15T10:00:00Z"
      }
    }
  ]
});

Querying Memories

// Search memories semantically
const memories = await agentbase.queryMemories({
  namespace: "user_12345",
  query: "What are the user's food preferences?",
  limit: 5
});

console.log(memories);
// [
//   { content: "User is allergic to shellfish", relevance: 0.95 },
//   { content: "User prefers vegetarian options", relevance: 0.87 }
// ]

Memory with Time Filters

// Retrieve recent memories only
const recentMemories = await agentbase.queryMemories({
  namespace: "user_12345",
  query: "recent interactions",
  timeFilter: {
    after: "2024-01-01T00:00:00Z",
    before: "2024-01-31T23:59:59Z"
  },
  limit: 10
});

// Get memories from specific time period

Deleting Memories

// Delete specific memories
await agentbase.deleteMemories({
  namespace: "user_12345",
  memoryIds: ["mem_abc123", "mem_def456"]
});

// Delete all memories for a namespace
await agentbase.deleteMemories({
  namespace: "user_12345",
  deleteAll: true
});

Use Cases

1. Personalized Customer Support

Create support agents that remember customer history:

const support = await agentbase.runAgent({
  message: "I'm having issues with my account",
  memory: {
    namespace: `customer_${customerId}`,
    enabled: true
  },
  system: `You are a customer support agent.

  Use memory to:
  - Recall previous support tickets and resolutions
  - Remember customer preferences and communication style
  - Track ongoing issues and promises made
  - Personalize responses based on customer history`
});

// Agent automatically recalls:
// - "Customer prefers email over phone"
// - "Had billing issue resolved on 2024-01-10"
// - "Premium tier customer since 2023"

2. Executive Assistant

Build assistants that remember user preferences and context:

const assistant = await agentbase.runAgent({
  message: "Schedule meetings for next week",
  memory: {
    namespace: `user_${userId}`,
    enabled: true
  },
  system: `You are a personal executive assistant.

  Remember and use:
  - User's calendar preferences (morning meetings, lunch blocks)
  - Recurring commitments and constraints
  - Preferred meeting locations
  - Communication preferences with different contacts
  - Travel schedules and time zones`
});

// Agent recalls:
// - "User blocks 12-1pm for lunch"
// - "Prefers video calls for external meetings"
// - "Traveling to NYC Jan 15-17"

3. Learning Companion

Create educational agents that track progress:

const tutor = await agentbase.runAgent({
  message: "Let's continue our Python lesson",
  memory: {
    namespace: `student_${studentId}`,
    enabled: true
  },
  system: `You are a programming tutor.

  Track and recall:
  - Topics already covered
  - Student's strengths and weaknesses
  - Questions asked and concepts mastered
  - Preferred learning style
  - Projects in progress`
});

// Agent recalls:
// - "Completed variables and loops lessons"
// - "Struggling with object-oriented concepts"
// - "Prefers hands-on examples"
// - "Working on calculator project"

4. Sales Assistant

Remember prospect interactions and preferences:

const sales = await agentbase.runAgent({
  message: "Follow up with prospect about demo",
  memory: {
    namespace: `prospect_${prospectId}`,
    enabled: true
  },
  system: `You are a sales development representative.

  Remember:
  - Previous conversations and pain points discussed
  - Decision makers and stakeholders identified
  - Budget and timeline information
  - Competitor mentions
  - Objections raised and addressed`
});

// Agent recalls:
// - "Interested in enterprise plan"
// - "Budget approved for Q2"
// - "Currently using Competitor X"
// - "CTO is key decision maker"

5. Health & Wellness Coach

Track user goals and progress:

const coach = await agentbase.runAgent({
  message: "How did my workout go this week?",
  memory: {
    namespace: `user_${userId}`,
    enabled: true
  },
  system: `You are a health and wellness coach.

  Track:
  - Fitness goals and milestones
  - Workout history and progress
  - Dietary preferences and restrictions
  - Sleep patterns
  - Energy levels and mood`
});

// Agent recalls:
// - "Goal: Run 5K by March"
// - "Completed 3 workouts this week"
// - "Vegetarian diet"
// - "Best workout time is morning"

6. Research Assistant

Accumulate knowledge across research sessions:

const researcher = await agentbase.runAgent({
  message: "Continue research on renewable energy",
  memory: {
    namespace: `project_${projectId}`,
    enabled: true
  },
  system: `You are a research assistant.

  Remember:
  - Research topics explored
  - Key findings and sources
  - Questions to investigate
  - Hypotheses formed
  - Papers read and summarized`
});

// Agent recalls:
// - "Reviewed 12 papers on solar efficiency"
// - "Key finding: efficiency increased 15% since 2020"
// - "To investigate: cost trends in battery storage"

Best Practices

Memory Scope Design

User-Level Namespaces

// Good: Scope by user for personalization
memory: {
  namespace: `user_${userId}`,
  enabled: true
}

// Each user gets isolated memory

Organization-Level Namespaces

// For shared knowledge within organizations
memory: {
  namespace: `org_${orgId}`,
  enabled: true
}

// Team-wide knowledge accessible to all members

Project-Level Namespaces

// For project-specific context
memory: {
  namespace: `project_${projectId}`,
  enabled: true
}

// Isolate project-related information

Hierarchical Namespaces

// Combine scopes for granular control
memory: {
  namespace: `org_${orgId}_user_${userId}`,
  enabled: true
}

// User-specific memories within organization context

Memory Storage Guidelines

Be Specific: Store concrete, actionable information rather than vague generalizations. “User prefers meetings at 10am” is more useful than “User likes mornings.”

Store Facts, Not Conversations

// Good: Extract and store facts
await agentbase.storeMemory({
  namespace: "user_123",
  memories: [
    { content: "User allergic to peanuts" },
    { content: "User's birthday is March 15" },
    { content: "User prefers dark mode in UI" }
  ]
});

// Avoid: Storing full conversation text
await agentbase.storeMemory({
  namespace: "user_123",
  memories: [
    { content: "User: I'm allergic to peanuts. Agent: I'll remember that." }
  ]
});

Add Metadata for Context

// Include relevant metadata
await agentbase.storeMemory({
  namespace: "user_123",
  memories: [
    {
      content: "User completed Python course",
      metadata: {
        category: "education",
        timestamp: "2024-01-15T10:00:00Z",
        confidence: 1.0,
        source: "course_platform"
      }
    }
  ]
});

Update Stale Information

// Remove or update outdated memories

// First, query for existing memory
const oldMemories = await agentbase.queryMemories({
  namespace: "user_123",
  query: "user address"
});

// Delete old address
await agentbase.deleteMemories({
  namespace: "user_123",
  memoryIds: oldMemories.map(m => m.id)
});

// Store new address
await agentbase.storeMemory({
  namespace: "user_123",
  memories: [
    {
      content: "User's address is 123 New St, Boston, MA",
      metadata: { updatedAt: new Date().toISOString() }
    }
  ]
});

Privacy and Compliance

PII Handling: Be mindful of storing personally identifiable information (PII). Implement proper data retention policies and provide users with memory deletion capabilities.

// Implement user data deletion
async function deleteUserData(userId: string) {
  // Delete all user memories for GDPR compliance
  await agentbase.deleteMemories({
    namespace: `user_${userId}`,
    deleteAll: true
  });

  console.log(`All data deleted for user ${userId}`);
}

// Provide users with memory viewing
async function getUserMemories(userId: string) {
  const memories = await agentbase.queryMemories({
    namespace: `user_${userId}`,
    query: "*",  // Get all memories
    limit: 1000
  });

  return memories;
}

// Allow users to delete specific memories
async function deleteSpecificMemory(userId: string, memoryId: string) {
  await agentbase.deleteMemories({
    namespace: `user_${userId}`,
    memoryIds: [memoryId]
  });
}

Memory Retrieval Optimization

Limit Retrieved Memories

// Don't retrieve too many memories at once
const memories = await agentbase.queryMemories({
  namespace: "user_123",
  query: "user preferences",
  limit: 10  // Top 10 most relevant
});

// Too many memories can dilute context and increase costs

Use Specific Queries

// Good: Specific query
const foodPrefs = await agentbase.queryMemories({
  namespace: "user_123",
  query: "dietary restrictions and food allergies"
});

// Avoid: Overly broad query
const everything = await agentbase.queryMemories({
  namespace: "user_123",
  query: "everything about the user"
});

Filter by Category

// Use metadata to filter memories
const preferences = await agentbase.queryMemories({
  namespace: "user_123",
  query: "user preferences",
  filter: {
    category: "preferences"
  }
});

Integration with Other Primitives

With Sessions

Combine session state with long-term memory:

// Long-term memory + session-specific state
const result = await agentbase.runAgent({
  message: "Continue our conversation",
  session: sessionId,  // Session-specific conversation
  memory: {
    namespace: `user_${userId}`,  // Long-term user memory
    enabled: true
  }
});

// Session maintains conversation flow
// Memory provides long-term context and personalization

Learn more: Sessions Primitive

With Multi-Agent Systems

Share knowledge across specialized agents:

const result = await agentbase.runAgent({
  message: "Help me with my order",
  memory: {
    namespace: `customer_${customerId}`,
    enabled: true
  },
  agents: [
    {
      name: "Order Specialist",
      description: "Handles order questions",
      // Accesses same customer memory
    },
    {
      name: "Billing Specialist",
      description: "Handles billing questions",
      // Accesses same customer memory
    }
  ]
});

// All agents share customer memory

Learn more: Multi-Agent Primitive

With RAG

Combine semantic memory with document retrieval:

const result = await agentbase.runAgent({
  message: "What did we discuss about the Q4 strategy?",
  memory: {
    namespace: `team_${teamId}`,
    enabled: true
  },
  datastores: [
    {
      id: "ds_company_docs",
      name: "Company Documents"
    }
  ]
});

// Memory: Recalls specific discussions and decisions
// RAG: Retrieves relevant documents and references

Learn more: RAG Primitive

With Prompts

Guide memory usage with system prompts:

const result = await agentbase.runAgent({
  message: "Plan my week",
  memory: {
    namespace: `user_${userId}`,
    enabled: true
  },
  system: `You are a personal assistant.

  ALWAYS recall from memory:
  - User's work schedule and commitments
  - Personal preferences for meeting times
  - Recurring tasks and habits
  - Goals and priorities

  Store in memory:
  - New commitments mentioned
  - Updated preferences
  - Completed tasks and milestones`
});

Learn more: Prompts Primitive

Performance Considerations

Memory Retrieval Latency

Cold Start: First memory query in a session: ~200-500ms
Warm Cache: Subsequent queries: ~50-100ms
Optimization: Limit retrieved memories to top 5-10 most relevant

// Efficient: Retrieve only what's needed
const memories = await agentbase.queryMemories({
  namespace: "user_123",
  query: "current projects",
  limit: 5  // Just the most relevant
});

// Less efficient: Retrieving too much
const allMemories = await agentbase.queryMemories({
  namespace: "user_123",
  query: "*",
  limit: 100  // Probably overkill
});

Token Usage

Memories consume input tokens when injected into agent context:

// Each memory retrieved adds to token count
// 10 memories × 50 tokens each = 500 tokens

// Optimize by being selective about retrieval
memory: {
  namespace: "user_123",
  enabled: true,
  maxMemories: 5  // Limit automatic retrieval
}

Storage Costs

Storage Pricing: Memory storage is included in your plan up to limits. See pricing page for details.

Keep memories concise and factual
Delete outdated or irrelevant memories
Implement retention policies for automatic cleanup

// Clean up old memories periodically
async function cleanupOldMemories(namespace: string, daysOld: number) {
  const cutoffDate = new Date();
  cutoffDate.setDate(cutoffDate.getDate() - daysOld);

  const oldMemories = await agentbase.queryMemories({
    namespace,
    query: "*",
    timeFilter: {
      before: cutoffDate.toISOString()
    },
    limit: 1000
  });

  if (oldMemories.length > 0) {
    await agentbase.deleteMemories({
      namespace,
      memoryIds: oldMemories.map(m => m.id)
    });

    console.log(`Deleted ${oldMemories.length} old memories`);
  }
}

Troubleshooting

Agent Not Recalling Memories

Problem: Agent doesn’t use stored memories in responsesSolutions:

Verify memory is enabled with enabled: true
Check namespace matches between storage and retrieval
Ensure memories are relevant to current query (semantic match)
Add guidance in system prompt to use memory
Query memories manually to verify they exist

// Debug memory retrieval
const memories = await agentbase.queryMemories({
  namespace: "user_123",
  query: "test query",
  limit: 10
});

console.log("Retrieved memories:", memories);

// If empty, memories may not be stored correctly

Irrelevant Memories Retrieved

Problem: Agent retrieves memories that aren’t relevantSolutions:

Make memory content more specific and detailed
Add category metadata for filtering
Use more specific queries when retrieving
Reduce the number of memories retrieved
Delete outdated or low-quality memories

// Add category metadata for better filtering
await agentbase.storeMemory({
  namespace: "user_123",
  memories: [
    {
      content: "User prefers dark mode",
      metadata: { category: "ui_preferences" }
    }
  ]
});

// Filter by category when retrieving
const uiMemories = await agentbase.queryMemories({
  namespace: "user_123",
  query: "interface preferences",
  filter: { category: "ui_preferences" }
});

Memory Namespace Confusion

Problem: Memories leaking between users or contextsSolutions:

Always use unique, consistent namespace identifiers
Include user ID or tenant ID in namespace
Validate namespace before storage/retrieval
Implement namespace access controls

// Ensure namespace consistency
function getMemoryNamespace(userId: string): string {
  if (!userId) {
    throw new Error("User ID required for memory namespace");
  }
  return `user_${userId}`;
}

// Use helper function consistently
const result = await agentbase.runAgent({
  message: "Hello",
  memory: {
    namespace: getMemoryNamespace(userId),
    enabled: true
  }
});

Duplicate or Conflicting Memories

Problem: Multiple similar memories causing confusionSolutions:

Query existing memories before storing new ones
Update existing memories instead of creating duplicates
Implement deduplication logic
Add timestamps to identify most recent information

// Check for existing memory before storing
async function updateOrCreateMemory(
  namespace: string,
  content: string,
  category: string
) {
  // Check for existing
  const existing = await agentbase.queryMemories({
    namespace,
    query: content,
    filter: { category }
  });

  // Delete old versions
  if (existing.length > 0) {
    await agentbase.deleteMemories({
      namespace,
      memoryIds: existing.map(m => m.id)
    });
  }

  // Store new version
  await agentbase.storeMemory({
    namespace,
    memories: [
      {
        content,
        metadata: {
          category,
          updatedAt: new Date().toISOString()
        }
      }
    ]
  });
}

Advanced Patterns

Confidence Scoring

Track confidence in stored information:

await agentbase.storeMemory({
  namespace: "user_123",
  memories: [
    {
      content: "User mentioned interest in photography",
      metadata: {
        confidence: 0.8,  // Mentioned once
        source: "chat",
        timestamp: new Date().toISOString()
      }
    }
  ]
});

// Later, increase confidence after confirmation
await agentbase.storeMemory({
  namespace: "user_123",
  memories: [
    {
      content: "User is a professional photographer",
      metadata: {
        confidence: 1.0,  // Confirmed
        source: "profile",
        timestamp: new Date().toISOString()
      }
    }
  ]
});

Hierarchical Memory

Organize memories in hierarchies:

// Organization-level memory (shared)
await agentbase.storeMemory({
  namespace: "org_acme",
  memories: [
    { content: "Company uses Slack for communication" },
    { content: "Office hours are 9am-5pm EST" }
  ]
});

// Team-level memory
await agentbase.storeMemory({
  namespace: "org_acme_team_engineering",
  memories: [
    { content: "Team does daily standups at 10am" },
    { content: "Sprint planning every other Monday" }
  ]
});

// User-level memory (most specific)
await agentbase.storeMemory({
  namespace: "org_acme_team_engineering_user_123",
  memories: [
    { content: "User leads frontend development" },
    { content: "User mentoring 2 junior developers" }
  ]
});

Memory Decay

Implement time-based memory importance:

async function getMemoriesWithDecay(
  namespace: string,
  query: string
) {
  const memories = await agentbase.queryMemories({
    namespace,
    query,
    limit: 20
  });

  // Calculate age-based relevance
  const now = new Date();
  const scoredMemories = memories.map(memory => {
    const age = now - new Date(memory.timestamp);
    const daysSinceCreated = age / (1000 * 60 * 60 * 24);

    // Decay factor: newer memories are more relevant
    const decayFactor = Math.exp(-daysSinceCreated / 30); // 30 day half-life

    return {
      ...memory,
      adjustedRelevance: memory.relevance * decayFactor
    };
  });

  // Sort by adjusted relevance
  return scoredMemories.sort(
    (a, b) => b.adjustedRelevance - a.adjustedRelevance
  );
}

Sessions

Maintain conversation state within a single session

RAG

Retrieve information from document datastores

Multi-Agent

Share memory across specialized agents

Prompts

Guide agents on memory usage patterns

Additional Resources

API Reference

Complete memory API documentation

Privacy Guide

GDPR compliance and data handling

Best Practices

Memory optimization patterns

Remember: Memory is most powerful when it stores specific, actionable facts rather than general information. Focus on what will make future interactions more personalized and efficient.

Getting Started

Build

Deploy

Improve

Agent Primitives

API Reference

Resources

​Overview

Automatic Storage

Semantic Retrieval

Scoped Memory

Temporal Awareness

​How Memory Works

​Memory Types

​User Memory

​Conversation Memory

​Knowledge Memory

​Code Examples

​Basic Memory Usage

​Retrieving Memories

​Explicit Memory Storage

​Querying Memories

​Memory with Time Filters

​Deleting Memories

​Use Cases

​1. Personalized Customer Support

​2. Executive Assistant

​3. Learning Companion

​4. Sales Assistant

​5. Health & Wellness Coach

​6. Research Assistant

​Best Practices

​Memory Scope Design

​Memory Storage Guidelines

​Privacy and Compliance

​Memory Retrieval Optimization

​Integration with Other Primitives

​With Sessions

​With Multi-Agent Systems

​With RAG

​With Prompts

​Performance Considerations

​Memory Retrieval Latency

​Token Usage

​Storage Costs

​Troubleshooting

​Advanced Patterns

​Confidence Scoring

​Hierarchical Memory

​Memory Decay

​Related Primitives

Sessions

RAG

Multi-Agent

Prompts

​Additional Resources

API Reference

Privacy Guide

Best Practices

Overview

How Memory Works

Memory Types

User Memory

Conversation Memory

Knowledge Memory

Code Examples

Basic Memory Usage

Retrieving Memories

Explicit Memory Storage

Querying Memories

Memory with Time Filters

Deleting Memories

Use Cases

1. Personalized Customer Support

2. Executive Assistant

3. Learning Companion

4. Sales Assistant

5. Health & Wellness Coach

6. Research Assistant

Best Practices

Memory Scope Design

Memory Storage Guidelines

Privacy and Compliance

Memory Retrieval Optimization

Integration with Other Primitives

With Sessions

With Multi-Agent Systems

With RAG

With Prompts

Performance Considerations

Memory Retrieval Latency

Token Usage

Storage Costs

Troubleshooting

Advanced Patterns

Confidence Scoring

Hierarchical Memory

Memory Decay

Related Primitives

Additional Resources