SharedBrain
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What Claude learns in one project, it knows in all of them.

SharedBrain gives Claude Code one memory for every project on your Mac, and shows you everything it remembers so you can fix what's wrong.

Download for Mac

Free during the beta. For Macs with Apple Silicon, 5.9 MB.

SharedBrain is a Mac app. Open this page on your Mac to download it.

SharedBrain inbox: a suggestion to make a fact found in two projects global, and three new memories to review.
fig. 1 The inbox. Claude found the same fact in two projects and suggests making it global.

How it works

  1. When a session starts

    Claude gets a short briefing: your preferences, and what it already knows about this project and similar ones.

  2. While it works

    It looks up what it solved in other projects and saves what it learns in this one.

  3. Whenever you want

    You open the app and review what Claude saved. Keep it, fix it, or archive it.

Project view with the briefing text Claude receives, and its size in characters and tokens.
fig. 2 The briefing preview shows exactly what Claude reads when a session starts in each project.

It all stays on your Mac.

Your memory is a database on your computer. No account, no cloud, and the app never connects to the internet. Mark a project as private and nothing from it reaches your other projects.

Questions

Is it free?
Yes, with no limits during the beta. Later, the free plan will cover up to 3 active projects, and an optional Pro plan will add sync between Macs and smarter search.
Does anything leave my Mac?
The app doesn't connect to the internet. What it adds to a session (the briefing and search results) goes to Anthropic as part of your normal Claude Code session, like your code does.
What does it change in Claude Code?
It installs one plugin, sharedbrain, with three hooks and a local MCP server. If you allow it, it adds one rule to ~/.claude/settings.json so Claude can use its memory without asking each time. It reads your existing memory files and CLAUDE.md but never writes to them.
How do I uninstall it?
In the app, go to Settings → Claude Code connection → Uninstall, then move SharedBrain to the Trash. To delete the stored memory too, remove ~/Library/Application Support/SharedBrain.
Is it made by Anthropic?
No. It's an independent app that works with Claude Code through its public plugin system.

Try it on your Mac.

Download for Mac

Free during the beta. For Macs with Apple Silicon, 5.9 MB.

Needs macOS 12 or later, an Apple Silicon Mac and Claude Code.

Version 0.1.1, released November 10, 2026.

Opening it the first time

  1. Open the .dmg and drag SharedBrain to Applications.
  2. This beta isn't signed by Apple yet, so macOS blocks it the first time. Go to System Settings → Privacy & Security and click Open Anyway.
  3. In SharedBrain, click Connect. It finds Claude Code, imports your existing memory and installs the plugin.

If macOS says the app is damaged, run this in Terminal and open it again:

xattr -dr com.apple.quarantine /Applications/SharedBrain.app

SHA-256 a11fe137e03d5dc467eda2f11e13562865c23aac50f19686e803d513d799ebfc