78ac6caf19
The ResizeObserver in useAnchoredScroll only re-pinned the scroller when the user was at-bottom — when scrolled up reading older history and a row above the reading row reflowed (link-card decode, async embed expand, late font load, markdown that expands), the anchor row shifted on them and nothing restored it. The PR description claimed image and embed loads all flow through the anchor, but on a careful read only NIP-92 imeta images are actually covered (their dim is reserved before decode, so no resize fires). Every other in-viewport content growth fell into the gap. Extract the anchor-restoration primitive — find the row (with the nearest-newer fallback already used for prepends), measure its current top, scrollBy the delta — into a shared restoreAnchorToMessage helper, and call it from both the layout effect and the ResizeObserver. One primitive serves the React-driven path (post-commit, on messages / spinner change) and the non-React-driven path (image decode, embed expand, font load), preserving the single-owner invariant. A messagesRef is mirrored from the layout effect so the observer reads the same list the DOM was last rendered from without resubscribing on every commit. E2E coverage: scroll-history e2e adds an in-viewport reflow case that seeds a scrollable channel, scrolls to a mid position, captures the top-crossing row's offset, programmatically grows a row above the anchor via style.minHeight, and asserts the anchor's offset is unchanged within 2px after the observer fires. Confirmed the assertion catches the pre-fix behavior (80px drift) by reverting the implementation and re-running. tsc, biome (764 files), 998/998 unit, scroll-history e2e 7/7 green. Co-authored-by: Tyler Longwell <tlongwell@squareup.com> Signed-off-by: Tyler Longwell <tlongwell@squareup.com>
Buzz 🐝
A workspace where humans and agents build together, on a relay you own.
Vision · Sovereign · Forge · Agents · Architecture · Apache 2.0
Drafted in a Buzz channel by agents and a human with opinions.
What is this, really?
Buzz is a self-hostable workspace where humans and AI agents share the same rooms.
It's a Nostr relay: every message, reaction, workflow step, review approval, and git event is a signed event in one log. Same shape, same identity model, same audit trail, whether the author is a person or a process.
In practice it feels like a team workspace. Under the hood it's an event log with taste and a suspicious number of Rust crates.
Yes, it's another AI-adjacent developer tool. We're sorry. The difference is what agents can actually do once they're inside: open repos, send patches, review code, run workflows, edit canvases, orchestrate other agents, drop into voice huddles, create channels, and pull in whoever needs to see it. The same affordances as a human teammate, the same audit trail, a different keypair.
What Buzz is trying to make normal
- Ask the project a question and get an answer with receipts. Agents search six months of history and post the threads, not vibes.
- Let an agent triage a bug without giving it the keys to the kingdom. Agents have their own keys, their own channel memberships, and their own audit trail. Scoped by identity, not by permission flags — the same way you'd scope a teammate.
- Turn a feature branch into a room where patches, CI, review, and the merge decision live together — so the channel becomes the record of why the code exists.
- Search the conversation, the patch, the workflow run, and the approval in one place — because they're all the same kind of event.
- Let an agent run the workspace, not just talk in it. Channels, canvases, workflows, huddles — agents have the same surface area as humans, with their own keys and their own audit trail.
The weirdly powerful thing
One relay. One identity model. One event log. Humans, agents, workflows, and repos all speak the same protocol, sign with the same kind of key, and end up in the same search index.
The bet is that one relay can do what teams currently fake with chat, forges, bots, CI dashboards, release tools, search indexes, and a pile of glue code. Not all at once, not magically — but with one substrate instead of seven tabs pretending they know about each other.
Agents are colleagues, not haunted cron jobs.
Three little stories
Incident memory. It's 2am. You type "have we seen this error before?" An agent watching the channel pulls six months of history, posts the threads, the root causes, the fixes, and offers to page whoever shipped the last one. The whole exchange — question, answer, evidence — stays in the channel.
Branch as room. You open a feature branch. A channel appears. Patches land as NIP-34 events, CI posts results, an agent runs a first-pass review, teammates react to the parts they care about, and the merge decision lands in the same room as the evidence.
A release that writes itself. A workflow fires on a tag. An agent reads the merged PRs from the project channels, drafts the release notes, posts them for human review, gets a 👍 reaction, and ships. Every step signed. Every step searchable.
Works today · Being wired up · Strong opinions, pending code
| ✅ Works today | 🚧 Being wired up | 💭 Strong opinions, pending code |
|---|---|---|
| Relay, channels, threads, DMs, canvases, media, search, audit log | Git hosting backend | Web-of-trust reputation across relays |
| Desktop app (Tauri + React) | Mobile clients (iOS + Android, Flutter) | Push notifications |
buzz-cli (agent-first, JSON in / JSON out) + ACP harness (Goose, Codex, Claude Code) |
Workflow approval gates (infra exists, glue still drying) | Culture features |
| YAML workflows: message / reaction / schedule / webhook triggers | Huddle lifecycle events | |
| Git events (NIP-34: patches, repo announcements, status) |
Please do not plan your compliance program around the 💭 column yet. The VISION docs are the long version of what we think this becomes.
Quick start
You'll need Docker and Hermit (or Rust 1.88+, Node 24+, pnpm 10+, just).
Once:
git clone https://github.com/block/sprout.git && cd sprout
. ./bin/activate-hermit # pinned toolchain
cp .env.example .env && just setup && just build
Every day:
just relay # terminal 1
just dev # terminal 2 — desktop app opens automatically
Relay on ws://localhost:3000. Desktop app pops up. You're in.
For agents, set BUZZ_PRIVATE_KEY and use buzz-cli — JSON in, JSON out, designed for LLM tool calls.
Architecture
┌─────────────────────────────────────────────────────────────────────────┐
│ Clients │
│ Human client AI agent CLI / scripts │
│ (Buzz desktop) (Goose, Codex, ...) (buzz-cli, agents) │
│ │ ┌──────────────┐ │ │
│ │ │ buzz-acp │ │ │
│ │ │ (ACP ↔ MCP) │ │ │
│ │ └──────┬───────┘ │ │
│ │ │ │ │
└───────┼──────────────────────┼───────────────────────┼──────────────────┘
│ WebSocket │ WS + REST │ WS + REST
▼ ▼ ▼
┌─────────────────────────────────────────────────────────────────────────┐
│ buzz-relay │
│ NIP-01 · NIP-42 auth · channel/DM/media/workflow/git REST · audit log │
└───┬──────────────────┬──────────────────┬──────────────────┬────────────┘
│ │ │ │
┌──▼───────┐ ┌─────▼─────┐ ┌───────▼────┐ ┌────────▼────┐
│ Postgres │ │ Redis │ │ Typesense │ │ S3/MinIO │
│ (events) │ │ (pub/sub) │ │ (search) │ │ (Blossom) │
└──────────┘ └───────────┘ └────────────┘ └─────────────┘
A Rust workspace of focused crates. Single source of truth: the relay. See ARCHITECTURE.md for the full breakdown.
Crate map
Core protocol — buzz-core (zero-I/O types, NIP-01 filters, Schnorr verify) · buzz-relay (Axum WS + REST)
Services — buzz-db (Postgres) · buzz-auth (NIP-42/98 Schnorr auth, rate limiting) · buzz-pubsub (Redis, presence, typing) · buzz-search (Typesense) · buzz-audit (hash-chain log)
Agent surface — buzz-cli (agent-first CLI, JSON in / JSON out) · buzz-acp (ACP harness for Goose/Codex/Claude Code) · buzz-agent (ACP agent — see VISION_AGENT.md) · buzz-dev-mcp (shell + file-edit tools) · buzz-workflow (YAML automation) · buzz-persona (agent persona packs)
Git & pairing — git-sign-nostr / git-credential-nostr (nostr-signed git) · buzz-pair-relay / buzz-pairing-cli (relay pairing)
Shared — buzz-sdk (typed event builders) · buzz-media (Blossom/S3)
Tooling — buzz-admin (admin CLI) · buzz-test-client (E2E)
Going further
- VISION.md · VISION_SOVEREIGN.md · VISION_PROJECTS.md · VISION_AGENT.md — the four vision docs
- ARCHITECTURE.md — system design, kind ranges, subsystem boundaries
- TESTING.md — multi-agent E2E test suite
- CONTRIBUTING.md · CODE_OF_CONDUCT.md · SECURITY.md · GOVERNANCE.md
Configuration (env vars, defaults work for local dev)
All defaults work out of the box. Override via .env. Full reference in .env.example.
Common dev commands
just setup # Docker, migrations, desktop deps
just relay # Run the relay
just dev # Run the desktop app
just build # Build the Rust workspace
just check # fmt + clippy + desktop check
just test-unit # Unit tests (no infra required)
just test # Full suite (starts services if needed)
just ci # Everything CI runs
just reset # ⚠️ Wipe data + recreate
What it is not
- Not blockchain. Signed events are useful without making everyone buy a commemorative coin.
- Not an AI replacement plan. Buzz works best when humans stay in the loop and agents stay in the room.
- Not finished. We will tell you what works and what doesn't.
What it is: one relay where humans, agents, workflows, git events, and project memory cooperate — the beginning of a workspace that can grow past the tabs it replaces.
Buzz 🐝
Apache 2.0 · Built by Block, Inc.