Blog

AI Agent guides and updates

Learn how to build better AI agents with memory, context, and knowledge layers. Tutorials, guides, and best practices from the RetainDB team.

Featured

How to Build AI Agents with Persistent Memory (2026)

A comprehensive, step-by-step guide to adding persistent memory to AI agents. Learn memory architectures, storage strategies, and implementation patterns for production-ready agents.

25 min read
3/9/2026
ArchitectureGuide

Stateful vs Stateless AI Agents: Complete Guide

Understand the difference between stateful and stateless AI agents. Learn when to use each architecture, common failure modes, and how to build production-ready stateful agents.

20 min
3/9/2026
ComparisonMemory

RAG vs Memory Layer for AI Agents

Understand when retrieval solves the problem, when persistent memory matters more, and how the two work together in production agent systems.

10 min
3/30/2026
ContextGuide

Context for AI Agents

A practical guide to working context, retrieved knowledge, and persistent memory assembled before every model call.

9 min
3/30/2026
TutorialLangGraph

LangGraph Memory Tutorial

Learn where LangGraph checkpoints stop, where persistent memory begins, and how to combine both cleanly.

9 min
3/30/2026
TutorialLangChain

LangChain Persistent Memory

Separate chat history from durable memory so LangChain agents can remember users across sessions.

8 min
3/30/2026
TutorialOpenAI

How to Add Memory to an OpenAI Assistant

Add persistent memory to an OpenAI assistant so it can remember preferences, prior decisions, and user context over time.

8 min
3/30/2026
GuidePreferences

How an AI Agent Remembers User Preferences

Preference memory is one of the highest-leverage UX wins in AI. Here is how to implement it without bloating every prompt.

7 min
3/30/2026
ComparisonVector Search

Vector Database vs Memory Layer

Semantic retrieval and persistent memory solve different product problems. This guide explains where each layer belongs.

8 min
3/30/2026
ContextArchitecture

Context Engineering for AI Agents

A practical guide to assembling retrieval, memory, and working state before each model call.

8 min
3/30/2026
ArchitectureState

AI Agent State Management

Learn how to separate working state, retrieved knowledge, and persistent memory in production agent systems.

8 min
3/30/2026
Product StrategyMemory

Your AI Agent Has a Memory Problem — And It's Costing You

Most AI product teams are losing users to a problem they haven't fully named yet. It's not the model. It's not the prompt. It's that the agent forgets everything.

12 min
4/4/2026
Product StrategyArchitecture

Everyone Is Obsessing Over the Wrong Part of AI Agents

Teams spend weeks debating which LLM to use. The model is rarely the bottleneck. Here's what actually determines whether your AI product feels intelligent.

14 min
4/4/2026
TechnicalVector Search

Why Vector Search Alone Fails AI Agent Memory (And What to Use Instead)

Vector search is the default for AI memory retrieval. For a specific class of queries, it fails quietly and predictably. Here's the hybrid retrieval architecture that fixes it.

18 min
4/4/2026

No blog posts yet. Check back soon!