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Free for personal use · Claude Code · Codex

Memory for
your agent.

Free. Offline. Zero dependencies. Hooks into Claude Code and Codex and keeps what your agent learns — across sessions, across projects.

Install for Claude CodeSee the demo ↓

How it stores and recalls what matters.

Every fact your agent saves is a node. The engine links them by name, date and relevance, and recalls them with two-hop activation — no embeddings, no server, instant.

Below is the real Cortex, not a picture — a sample project’s live memory. Switch to 3D and drag to spin the brain, or type a question in the panel and watch the matching memory light up while the rest dims.

Live demo · sample data · runs fully in your browser, no server

Meet the Cortex

A brain you can read.

The Cortex is the memory, drawn. Swipe through what makes it more than a database.

  • The brain01

    Your memory, alive.

    The Cortex draws everything your agent knows as a living brain of points — one glow per fact. Not a list, not a database dump: the shape of what it remembers.

  • Five zones02

    Every memory in its place.

    Decisions, goals, project facts, who you are, what was lived — each kind of memory settles in its own region of the brain, by name and meaning.

  • Search03

    It fires what you ask.

    Type a query and only the matching fact and its connections light up — the rest dims, like a neuron firing. You see the recall happen, you do not guess it.

  • Thinking04

    It shows how it thinks.

    The zones the agent consulted recently glow brighter. The Cortex is not a static picture — it is a readout of what the memory actually used.

  • Yours05

    Local, private, offline.

    The whole brain renders from a single local file, with no network and no account. Your memory never leaves your machine.

How it works.

No embeddings, no vector database, no API calls. The Cortex runs entirely on your machine, stores facts in a local graph, and retrieves them with two-hop activation — in milliseconds.

claudeprojectmemoryuserhoststackdatebenchmarkhook

The memory graph — hover a node to follow its links

Capture

Your agent talks.
The hook listens.

Corvusmem installs as a PostToolUse hook in Claude Code. After every tool call, it extracts facts from the exchange — file paths, decisions, project context — and writes them to the local Cortex graph.

claudecodePostToolUsehookextractcortex.jsonzero friction

Store

Facts, not vectors.
Dates, not embeddings.

Each fact lands in a lightweight JSON graph with its entity name, date and temporal context. No server, no cloud, no API key. The entire Cortex is a single file you own.

factentity"astro"date2026-10-30valuev5.xproject→ stacksession→ datecortex.json · local · yours

Retrieve

Two-hop activation.
No semantic search needed.

When your agent needs context, the Cortex activates the matching node and spreads one hop out — surfacing related facts without a vector DB or embedding model. Deterministic. Offline. Instant.

query"astro"astrostackprojectdatehop 0 · matchhop 1 · related

The numbers, unedited.

Measured with Qwen3-8B running locally as both respondent and judge — the same ruler for every engine, so the head-to-head is fair. Not comparable to mem0/Zep’s official leaderboards, which use GPT-4o.

LoCoMo · 1,986 questions · full dataset

EngineOverall
Corvusmem25.6%
Embedding e528.0%
mem021.1%
Zep / Graphitirunning

Temporal reasoning (cat2)

16.2%

Corvusmem

5.3%

mem0

+206% vs mem0

Corvusmem stores facts with explicit date and temporal context. That’s why it almost doubles mem0 on temporal recall — and why it matters for long-running agents that need to remember when, not just what.

See full benchmarks

Plug it in where you already work.

One command. No account, no cloud, no API key — the hook writes to a local file you own.

  • Claude Code
  • Codex
  • Standalone
Full docs

Free for you. Fair for everyone.

Free for personal and non-commercial use under PolyForm Noncommercial. Using it inside a company or a paid product needs a commercial license. Zero telemetry — your memory lives in local files you own.

PolyForm NoncommercialCommercial license availablev0.x · early
Get a commercial license