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You use AI every day. A year of it should add up to something, and right now it doesn't. Every new chat starts from zero.
Second Brain is a memory layer that runs in your own Cloudflare account. Claude, ChatGPT, Cursor, Windsurf and any other MCP client read and write the same store, so what you work out in one tool is there in the next one.
Getting things in
Getting things back
Recall is semantic, not keyword. Memories link to each other, so a multi-hop search surfaces the reasoning behind a decision, not just the decision.
Entries carry a status (canonical, draft, deprecated) so an agent knows which version of a fact to trust.
Contradictions get flagged for a human to settle instead of quietly overwritten.
Where it lives
Your Cloudflare account: Workers, D1 and Vectorize.
Typical personal use sits inside Cloudflare's free tier. Open source on GitHub. No account with us, and nothing routes through our infrastructure.
Setup
Signed desktop app for Mac and Windows, one-click Cloudflare deploy, or clone the repo and run wrangler.
vscode.dev TheSecondBrain.devTheSecondBrain.dev's answer:
Most AI memory tools store your context on their servers. This one deploys into your own Cloudflare account, so the memory is yours in a literal sense: your database, your vectors, your billing. We can't read it because we never have it.
The other difference is recall:
TheSecondBrain.dev's answer:
It works everywhere you work. Claude, ChatGPT, Cursor, Windsurf, Codex, any MCP client. Most memory tools only remember what happened inside their own app, so you end up with three AI tools holding three different versions of you.
You own the deployment. One-click deploy to Cloudflare, or a signed desktop installer if you'd rather not touch a terminal. Typical personal use sits inside Cloudflare's free tier, so there's no subscription to cancel and no vendor to migrate off later.
It's open source. MIT licensed. Read the code, fork it, extend it. Nothing about how your memory is stored or retrieved is a black box.
TheSecondBrain.dev's answer:
People who already live in these tools. They have an Obsidian vault or a Notion workspace, they're in Claude or ChatGPT every day, and some of them are in Cursor too. They're not casual users and they're not necessarily developers. They've built a system, and they've noticed the system doesn't talk to itself.
The shared frustration isn't "AI forgets." It's that a year of real thinking, hours of working through actual problems, hasn't left anything behind. Every conversation is good and then it's gone, and a month later they're figuring out the same thing from scratch.
They also tend to care where their work sits. Not privacy absolutists, just people who'd rather their own thinking accumulate in an account they control than in someone else's product they might have to leave.
TheSecondBrain.dev's answer:
I was using Claude, ChatGPT and Cursor every day and re-explaining the same projects to each of them. A year of that adds up to nothing. The decisions I'd worked out in one tool simply didn't exist in the next one.
I built it for myself first, on Cloudflare because I already had an account and the free tier meant I could run it without thinking about cost. Then I open sourced it, and what people asked for shaped what it became. The desktop app exists because a user on Product Hunt asked for a path that didn't involve a terminal, and she was right to ask.
I still use it every day. Most of the roadmap comes from hitting the limits of my own memory layer.
TheSecondBrain.dev's answer:
TheSecondBrain.dev's answer:
Based on our record, vscode.dev seems to be more popular. It has been mentiond 278 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Lightweight: Designed for speed, it works everywhereโincluding vscode.devโwithout the bloat. - Source: dev.to / 2 months ago
It's VSCode, so it's 90% similar to https://vscode.dev. - Source: Hacker News / 3 months ago
It is basically VS Code Web. Try https://vscode.dev/ to see how you feel. If you don't like it you won't like cider. - Source: Hacker News / 3 months ago
GitHub Codespaces provides 60 hours of free compute time every month, which is more than enough for scoped home assignments or interviews. Itโs a full VSCode in the browser at github.dev or vscode.dev. - Source: dev.to / 8 months ago
In VSCode extensions this is trivial, this is how you create the 'executable': https://github.com/floooh/vscode-kcide/blob/main/src/wasi.ts ...and this is how you run it: https://github.com/floooh/vscode-kcide/blob/2dfc621aade4a2be06b6a0e703bebb244f5e414c/src/assembler.ts#L33-L40 The asmx.wasm file is a vanilla POSIX cmdline tool (https://github.com/floooh/easmx) which loads and saves files, and the tool has been... - Source: Hacker News / 9 months ago
replit - Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages โ without spending a second on setup.
ChainMemory - Portable, verifiable memory for AI agents โ works across ChatGPT, Claude, Gemini and any MCP client
GitHub Codespaces - GItHub Codespaces is a hosted remote coding environment by GitHub based on Visual Studio Codespaces integrated directly for GitHub.
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
VS Code - Build and debug modern web and cloud applications, by Microsoft
OpenMemory MCP - Your private, local memory layer for all AI tools