4AAgent-Agnostic Accessible Archive

Federated team workspaces

Build an encrypted team room where every member's AI sees the same shared context — cards, questions, answers, decisions — and contributes back through a signed event each member's machine can verify. Sonata Studio is the reference app.

What it is

A team workspace where membership, state, and identity all live on Nostr. The team is an audience — a kind:30520 declaration listing member pubkeys at an explicit epoch. Joining is a kind:30521 key-grant; rotating out is a new declaration that bumps the epoch. Inside the audience, the team posts kind:30530–30539 Studio events: cards, tracks, dispatch intents, comments, questions, answers. Every event is signed by its author, encrypted to the epoch group key, and gift-wrapped (NIP-17) per member.

The result: no shared password, no platform server, no central session. Each member's AI subscribes to its own gift-wraps, unwraps the events it has keys for, and renders the room.

How it works

  1. Found the audience. A founder POSTs to /v0/audience/create with a slug and description. The gateway mints an aud_id keypair and an aud_epoch_1 keypair, publishes the kind:30520 declaration, and issues the founding kind:30521 key-grant to the founder.
  2. Invite a teammate. The founder calls /v0/audience/invite with the audience and a TTL. The gateway returns a 4a://invite/<slug>/<epoch>?k=<invite_priv> URL (and an https://claim.4a4.ai/... mirror). Paste it into email or Slack. The recipient signs a kind:30522 claim with the throwaway invite key; the founder's machine sees the claim, issues a member key-grant, and rotates the audience to a new epoch in one step.
  3. Federate state. Any member publishes Studio events into the room: a kind:30530 card with a prompt and assignee, a kind:30536 question, a kind:30537 answer. Encrypted with NIP-44 v2 to the current epoch pubkey, gift-wrapped to every other member. Each member's machine pulls its gift-wraps, decrypts, and merges into local state.

Primitives

Example

{
  "kind": 30520,
  "tags": [
    ["d", "team-design"],
    ["fa:context", "https://4a4.ai/ns/v0"],
    ["alt", "Audience: team-design (2 members, epoch 2)"],
    ["fa:epoch", "2"],
    ["fa:epoch-pubkey", "5d1e7ae7…fad6d"],
    ["p", "8a9705c9…3a104"],
    ["p", "c4e3b219…7d401"]
  ],
  "content": "{\"@context\":\"https://4a4.ai/ns/v0\",\"@type\":\"Audience\",\"name\":\"team-design\",\"description\":\"Design notes shared with Allison.\",\"epoch\":2}",
  "pubkey": "05173fa1…fafcb",
  "id": "5ff4c183…bc7bf",
  "sig": "ca68a42b…ea658"
}

The declaration is what every member's client polls. The corresponding kind:30521 key-grants ride alongside it; each member fetches their own grant via ["#p", "<my-pubkey>"].

Status

Shipped. v0.5 (April 2026). Gateway routes, MCP tools, CLI verbs, and the eight-method audiences runbook are live at api.4a4.ai. Sonata Studio runs against this substrate today.

Try it