AI second brains and agent memory
Second brains, LLM wiki kits, vault templates and memory servers that give your AI agent a memory it can read and write. Every brain is credited to its author, with setup steps for every major AI tool.
129 brains
Khazar Ayaz
An evidence-first memory runtime for AI agents featuring temporal versioning, admission policies, and explainable recall.
xoai
A graph-based memory framework that compiles documents into an interlinked wiki with an evidenced knowledge graph for AI agents and humans.
Feng Zhang· by zhangfengcdt
A high-performance semantic memory system for AI agents that provides Git-like version control and hierarchical storage.
Matrix OriginOfficial
A persistent memory layer for AI agents providing Git-like version control, branching, and auditing for memory mutations.
Lumen Labs· by ChrisCoder9000
BrainAPI is a knowledge graph–powered AI memory layer that transforms unstructured data into structured knowledge, enabling intelligent search, recommendations, and contextual memory for AI agents…
Serg Eroshe· by hermes-vps-agent
A persistent memory layer for AI agents using Obsidian-compatible Markdown vaults and MCP integration.
Chandra Doredla· by chandra447
A persistent memory and learning extension for Pi agents featuring SQLite-backed search, procedural skill storage, and automated background learning.
Elia Alberti
A Claude Code plugin that provides persistent memory by compressing, preserving, and resuming conversation context across sessions.
Nick· by angelnicolasc
A zero-dependency, embeddable memory server for AI agents that provides persistent knowledge graphs and reduces context token usage by up to 90%.
Liang Li· by liliang-cn
A local-first AI agent memory system combining a knowledge graph, ontology, and hybrid retrieval within a single SQLite file.
Aaron Bockelie
An Obsidian plugin that embeds an MCP server directly into your vault for AI-driven knowledge management.
Alexis Fox
An append-only, searchable memory framework for maintaining long-horizon context in coding agent sessions.
Shann· by shannhk
Karpathy-style LLM knowledge base for Obsidian.
Pratiyush Kumar Singh· by Pratiyush
A local, Python-based knowledge base that transforms AI agent session transcripts into an interlinked, searchable, and AI-consumable wiki.
Clay Good
A deterministic, local-first memory server providing structural cognition and governance guardrails for AI coding agents.
Josh Thomas
A plugin providing Letta-style editable memory blocks and an append-only journal for OpenCode agents.
Salih Ergut· by ergut
An MCP server that connects AI assistants to Logseq for seamless reading, writing, and semantic search of your knowledge graph.
Anirban Kar· by thecodacus
A self-wiring, markdown-based memory layer for AI agents that enforces the Open Knowledge Format (OKF) spec.
Scott Raisbeck· by Scott
An opinionated, Zettelkasten-inspired MCP memory server for AI agents to store and retrieve atomic, semantically linked knowledge.
Sumant· by ussumant
A plugin for Claude Code and Codex that compiles scattered markdown and codebase files into a synthesized, topic-based wiki for AI agents.
Naveed Harri· by naveedharri
The team second brain.
Oleksii Bondar· by oleksiijko
A local-first memory server for AI coding agents that stores project context and lessons in SQLite.
Alex· by ZhangHanDong
A Rust-based memory framework for coding agents providing persistent decision context via hybrid search and knowledge graphs.
Filip Pytloun
A self-hosted, secure MCP-based memory server providing intelligent fact extraction and long-term storage for AI agents.