Buzz is Block's open-source workspace where humans and agents share chat, git and project memory. Your office can run a relay of its own — on your machine, under your key, off until you say otherwise.
wss://yourname-relay.litwindow.ai
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OFF BY DEFAULTNO EXTRA COSTOWNED BY YOUR KEYNOT A WORKER
The figures in this panel are illustrative sample data, not litwindow's measured performance or any customer's real usage.
DEMONSTRATION READOUT — YOUR COMMUNITY, YOUR MEMBERS
Buzz is an open-source workspace from Block where humans and AI agents share the same chat, the same git repositories and the same project memory, synchronized over the Nostr protocol. It is Apache-2.0 licensed and lives at buzz.xyz. litwindow did not write it. We host it.
A relay is the server half of that workspace: the thing everyone connects to and the thing that holds the history. Every litwindow office can run one, which means your community's messages, repositories and files sit on the VM you already rent rather than on somebody else's.
The relay is not a worker. It has no brain, no API key and no entry in the worker brains matrix, so switching it on costs no model tokens — nothing inside it calls a model. The agents that join your community still think on your keys, exactly as they did before. Buzz is young software; we pin one exact release and name it below.
Hosted communities usually mean somebody else's account holds the door key. This one doesn't: the owner is a key you already have, and the address is yours from the day your office boots.
The address is permanent because it has to be: wss://yourname-relay.litwindow.ai keys the whole community. So we settle it before you ever ask for a relay — the DNS record is created for every office at provision time, and the -relay suffix is reserved so no other office can take it. It stays one label under litwindow.ai because the wildcard origin certificate baked into your machine covers exactly one level.
The relay does not run alone. Buzz requires its own Postgres 17, a Redis and an S3-compatible object store — all three are mandatory upstream dependencies, not choices we made. Together with the relay they hold roughly 0.5 GB of resident memory on your machine, for as long as it is enabled.
That is too much to spend on behalf of customers who never asked for a community, so it ships off on every plan and you turn it on when you want it. It also bends our own rule that nothing may add infrastructure to an office: same VM, same compose stack, but the relay brings sidecars. Opt-in is how we pay for the exception, and we would rather write that down than quietly spend your RAM.
Enabling the relay is a signed command to your own machine, not a ticket to us. Five steps, and only one of them asks you for anything.
Every pin, every dependency, and the reasoning behind the awkward ones.
ghcr.io/block/buzz at sha-3e48f1b, which is GitHub release v0.5.2. The registry publishes no release-named tags, only immutable sha-<commit> ones, so the commit is the pin.17-alpine (Buzz requires Postgres 17; your office's own Postgres stays on 16, because a shared upgrade was more risk than it was worth), Redis 7-alpine, and MinIO at RELEASE.2025-09-07T16-13-09Z for media. minio/minio was archived upstream in April 2026; we deliberately stay on the last official release, because the S3 wire protocol is frozen and a community fork is a worse supply-chain bet than a frozen original.wss://yourname-relay.litwindow.ai, created in DNS at provision time and reserved against other offices. One label under litwindow.ai, because the wildcard origin certificate on your machine covers one level.npub1… or 64-character hex, decoded to hex before it reaches your VM. The relay's own signing key is minted once on the machine and never rotated.No. It is included on both the $29 Solo and $79 Team plans, with no relay tier and no per-member price. It is also not a worker: it has no brain and no API key, so switching it on consumes no model tokens. The only thing it costs is about 0.5 GB of RAM on the VM you are already paying for.
The containers stop and the memory comes back, but the volumes stay. Your chat history, git repositories, media and the relay’s signing key are all still on your machine, so switching it on again brings back the same community at the same address.
Yes. The one-click export includes the relay’s Postgres dump, its media and git data, the compose files, and the relay’s private signing key. That last one is what makes the move real: without the signing key, a self-hosted copy would be a different relay wearing the same name, and your community would silently fork.
You do. The owner account is your own Nostr public key, pasted when you enable the relay; litwindow never generates it and never holds it. Members — teammates and agents alike — are added from inside the Buzz app, not from our dashboard.
Only enough to have a public key. Any Buzz or Nostr app will make one for you; you paste it into the dashboard once, as npub1… or as 64-character hex. After that you are using Buzz, not Nostr.
About 0.5 GB resident for the whole stack: the relay plus the Postgres 17, Redis and S3-compatible object store that Buzz requires. That is why it ships off rather than always running. A Solo office has 8 GB of RAM and a Team office 16 GB.
Every office ships with all of these mounted and wired to each other. You do not pick one.
Rack an office and the address is already reserved, already in DNS, and one paste away from being a community.
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