# How to Build Unified Agent Memory from Scratch

DevFeed: [How to Build Unified Agent Memory from Scratch](<https://devfeed.tech/articles/agent-memory-from-scratch-18297.md>)

Original publisher: [Read original article](<https://www.decodingai.com/p/how-to-implement-a-unified-memory-from-scratch>)

Author: Paul Iusztin

Published: 2026-07-14T05:01:54Z

Content type: tutorial

Language: en

Sources: [Decoding ML](<https://devfeed.tech/sources/decoding-ml.md>)

Topics: [AI Engineering](<https://devfeed.tech/topics/ai-engineering.md>), [Claude Code](<https://devfeed.tech/topics/claude-code.md>), [Graphs](<https://devfeed.tech/topics/graphs.md>), [LangChain](<https://devfeed.tech/topics/langchain.md>), [Large Language Model](<https://devfeed.tech/topics/llm.md>), [Database](<https://devfeed.tech/topics/database.md>), [Model Context Protocol](<https://devfeed.tech/topics/model-context-protocol.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [ai-engineering](<https://devfeed.tech/tags/ai-engineering.md>), [claude-code](<https://devfeed.tech/tags/claude-code.md>), [graph](<https://devfeed.tech/tags/graph.md>), [graph-database](<https://devfeed.tech/tags/graph-database.md>), [knowledge-graphs](<https://devfeed.tech/tags/knowledge-graphs.md>), [langchain](<https://devfeed.tech/tags/langchain.md>), [llm](<https://devfeed.tech/tags/llm.md>), [mcp](<https://devfeed.tech/tags/mcp.md>)

## AI overview

A tutorial on building a unified agent memory layer from scratch using knowledge graphs, including ingestion, querying, and serving. It discusses trade-offs among vector databases, graph databases, temporality, versioning, MCP servers, CLIs, and skills, and explains why understanding the underlying memory layer matters.

## Source excerpt

Ingest, query, and serve a unified memory from a single database.