16eb0b6685
## Summary Moves the producer side of the two event follow-up triggers into application code. The triggers stay in place, so both producers run until a later change drops the triggers after this ships to every pod. Builds on #8130 (`AdmittedTx`). Refs BUZZ-176. ### Push match enqueue New `store::event_follow_up::enqueue_push_match` replaces the `events_enqueue_push_match` trigger (`schema/functions/enqueue_push_match_job.sql`, migration 0023) and matches it exactly: - Same kind allowlist (9, 40002, 45001, 45003), now `PUSH_MATCH_KINDS`. - Takes the same SHARED `buzz_push_gate:<community>` advisory lock as its own statement, so under READ COMMITTED the lease check gets a snapshot taken after the lock is granted. Lease activations still take it EXCLUSIVE in `push.rs`. - Same lease predicate (`active AND endpoint_enabled AND expires_at > now`), then `INSERT push_match_queue ... ON CONFLICT DO NOTHING`. - Fails closed: any error rejects the event, as the trigger did. It runs right after the INSERT, only when the insert affected a row. The consumer side (claims, `lease_until`, attempts, reaper) is already app-owned and is unchanged. ### Channel TTL refresh `AdmittedTx` now records every channel that received an event (except kind 9007 and channel-less events). `AdmittedTx::commit()` refreshes their `ttl_deadline` as the last statement before COMMIT, which keeps the commit-time behavior of the deferred `events_refresh_channel_ttl` trigger (migration 0024): - One savepoint per channel, in sorted order, under the same SHARED `buzz_channel_ttl:<community>:<channel>` lock. - Runs the same `UPDATE` with the same `archived_at`/`deleted_at` filters as its own statement after the lock, so its snapshot follows the lock grant. Its `ttl_seconds IS NOT NULL` qual filters a permanent channel before any tuple lock, so a permanent channel's row is never locked. An ephemeral channel's row lock is held through the remaining refreshes and the COMMIT round trip (the trigger held it only inside COMMIT). - Lock keys come from one builder per protocol (`channel::channel_ttl_lock_key`, `push::push_gate_lock_key`), shared by the SHARED and EXCLUSIVE sides. The shared push-gate wait is observed through `observe_advisory_lock(LockType::PushGate, …)`. - On failure it rolls back the savepoint, logs a warning, and increments `buzz_db_channel_ttl_refresh_failures_total{reason}`, where `reason` is `lock_timeout` or `error`. The event still commits, matching the trigger's `EXCEPTION WHEN OTHERS`. A cancelled statement (`57014`) still rejects the transaction, because plpgsql never caught that either. - While both producers run, an app refresh that hits `lock_timeout` is counted, and then the trigger retries it inside COMMIT and may succeed. So during the dual window the failure counter can over-report and the worst-case wait doubles. Both go away when the retirement PR drops the triggers, after which the counter is exact. ### Call sites Every production `INSERT INTO events` calls `event_follow_up::after_admitted_insert`: - `insert_event_on` - `insert_event_with_thread_metadata_tx` - `LockedMemberSnapshot::replace_member_event` - `replace_addressable_event` - `publish_nip43_membership_locked` - `accept_lease_event` (kind 30350, a no-op today, kept so the policy has no exceptions) `replace_parameterized_event_in_transaction_impl` inserts inside the `parameterized_replace` savepoint. It enqueues the push job inside the savepoint, so a rollback to that savepoint also drops the job, and records the TTL channel only after the savepoint is released. The two rolled-back verification probes (`verify_floor_guard_behavior`, `verify_channel_roster_fence_behavior`) are named exceptions, because they never commit. ### Source policy `tests/observability_source.rs` adds `every_production_event_insert_runs_the_follow_up_hook`. It scans every `crates/*/src` and fails on any function that inserts into `events` without the hook. Matching is normalized (letter case, whitespace, `\` continuations, `\n`/`\t`/`\r` escapes, optional `public.`). The file is masked once first: comments (`//`, nested `/* */`) and string, raw-string (including `br"`/`cr"`), and char literals become spaces. `#[cfg(test)]` markers, `fn` signatures and the hook are all found in that masked view, so a marker in a comment (even a multiline block comment) strips nothing, an `fn` line inside a multiline string doesn't split a function, and a commented-out or quoted hook doesn't count. SQL is still matched in the original text. A table test pins the masker's output for each literal form. A fixture test pins what the scan rejects (no hook, push without TTL, a hook in a line comment, block comment, or string, lowercase or line-broken or escaped SQL, writers after test-only items or under comment mentions) and what it ignores (writers in `#[cfg(test)] mod`). A floor of seven hooked writers catches a scan that silently stops seeing writers. ### Tests `src/store/event_follow_up_postgres_tests.rs` is the contract suite from the BUZZ-176 discovery work, ported to the `AdmittedTx` API. It is a crate-internal `#[cfg(test)]` module because it runs `SET LOCAL` timeouts and in-transaction reads through the crate-private `AdmittedTx::conn()`. It runs on both the desired and migration schemas, in two arms: - **dual**: production during the migration window, with the triggers and the app code both running. - **app-only**: drops both triggers in the disposable database (and asserts no partition clones remain), the way the retirement migration will. The trigger-only baseline is the base branch, where the same suite passed before this change. The suite also pins the two branches that differ from "swallow everything": a `lock_timeout` failure increments `buzz_db_channel_ttl_refresh_failures_total{reason="lock_timeout"}` exactly once, and a statement cancel (`57014`) during the refresh rejects the event with no row, job, or deadline change. ## What got simpler Nothing yet. This adds a parallel producer during the migration window. It is what lets the follow-up PR delete two plpgsql functions, two triggers, and the "keep in sync with migrations/00xx" duplication between `schema/functions/` and `push.rs`. ## Verification Rebased onto `main` @ `745501962`. All runs used a Linux cloud workstation with the pinned toolchain (rustc/clippy 1.95.0, hermit), and the tree was clean before and after each run. The final head, `c5a06a82`, changes only `crates/buzz-db/tests/observability_source.rs` compared with `1eb11bde` (via `fbc9a598`, `7c0baa41`, `9199992c` and `d405b2f6`). Production source is identical between the two. | Check | SHA | Result | |---|---|---| | `cargo fmt --check`, `cargo clippy -p buzz-db --all-targets -D warnings` | `fbc9a598` | pass | | `cargo clippy` (workspace) | `1eb11bde` | pass | | source policy (`--test observability_source`), fmt, buzz-db clippy | `c5a06a82` | 17/17, pass, pass | | `cargo test --locked -p buzz-db` (non-PG) | `c5a06a82` | 148 lib + 17 policy + 5 doctests | | source policy (`--test observability_source`) | `fbc9a598` | 16/16 | | `cargo test --locked -p buzz-db` (non-PG) | `fbc9a598` | 148 lib + 16 policy + 5 doctests | | contract suite (`store::event_follow_up_postgres_tests`, desired/migration × dual/app-only) | `1eb11bde` | 4/4 | | buzz-db PG full | `1eb11bde` | 464/464 | | buzz-relay PG | `1eb11bde` | 378/378 | | GitHub CI | `fbc9a598` | 53 pass, 0 fail (Codex security review pending) | **Falsifications** (each mutation made the named test fail, then was reverted): - dropping the `relay_members` hook → policy names `publish_nip43_membership_locked` - no-op push producer → app-only arms fail, dual arms pass (trigger covers) - skipping the TTL refresh → app-only fails on the deadline; dual fails on the failure-metric assertion - swallowing `57014` → all four arms fail - dropping the metric increment → all four arms fail - unanchored `#[cfg(test)]` match, or no escape handling → fixture test fails - a `#[cfg(test)]` constructor that skips admission, added inside `impl AdmittedTx` (indented or as a column-0 `mod`) → `admitted_tx_is_constructed_only_by_admitting_constructors` fails; putting the strip back into the constructor scan → its fixture test fails - at `7c0baa41`: `accept_lease_event`'s hook commented out and the real call made through an alias → policy names `accept_lease_event` (the same mutation passes under the `fbc9a598` policy); hook matching on unmasked text → the comment/string fixtures fail - at `9199992c`/`d405b2f6`: no nested block-comment depth, no string-escape skip, no `br"`/`cr"` raw-literal prefix, or no raw-string branch at all in the masker → the follow-up fixture test fails - at `c5a06a82`: finding `#[cfg(test)]` in the unmasked text → `writer_after_block_commented_cfg_test` is no longer reported; finding `fn` signatures in the unmasked text → `writer_after_raw_string_example` is no longer reported; no `cr` raw prefix → the masker table test fails on `cr"` - unhooked writers appended to `side_effects.rs` (after test-only items, under a doc-comment mention, with an escaped newline) → policy names each **Live relay E2E**: an independent reviewer ran this at `1eb11bde` against a real relay and CLI, with PostgreSQL 17 and Redis 7, the follow-up triggers absent, and no partition clones. - A kind 9 on a TTL channel advanced the shortened deadline by about 580 s. On a permanent channel, the deadline stayed NULL. - Each accepted event produced exactly one pending `push_match_queue` row with the same event id. - An exact signed replay was a no-op. - While the exclusive TTL lock was held, the event and its job stayed invisible and the deadline didn't change. After release, both persisted once. - Roster create/join/add/remove kept SQL and wire state in step (1→2→3→2), with one current 39002 head. - NIP-33 replace, duplicate, stale, failure and retry cases all passed. Limits: the push lease was a SQL fixture, and push consumers were disabled. Kind 30023 is global, so channel-scoped TTL on the parameterized path is covered only by the PG contracts. No live relay rerun was done at `fbc9a598`, because that delta is test-only. **Latency** (measured at pre-rebase `f8380927`, same production delta; debug build on loopback, 1,000 samples per cell, EVENT→OK): head app-only p50/p99 3.80/4.58 ms (permanent) and 3.87/4.64 ms (TTL), against base trigger-only 3.49–3.53/4.00–4.03 ms and 3.56–3.62/4.30–4.46 ms. About +0.3 ms p50, from the extra client round trips (lock, UPDATE, savepoints, push lock/insert) that the triggers ran server-side. One debug loopback run, not a production p99. Not measured: contention from many writers on one hot TTL channel, where each writer now waits on the channel row lock for about two more client round trips (RELEASE SAVEPOINT and COMMIT) than with the trigger. In review, a burst of 8 concurrent posts to one TTL channel committed with no deadlock or lock timeout. Watch send p99 and `pg_locks` waits on `channels` during rollout. **Known pre-existing, not touched here:** `api::mesh_demo::tests::demo_join_forwarded_arm_round_trips_echo` is flaky when Redis is present. It returns a 504 in 4 of 5 runs at base `745501962` and 2 of 5 at `fbc9a598`, always at the same assertion. No CI lane selects it. --------- Signed-off-by: Elrond <28d6302a099e5225b02c4155ac4236e4912603df2ab08dbfc2f4fef08ce598c8@buzz.block.builderlab.xyz> Co-authored-by: Elrond <28d6302a099e5225b02c4155ac4236e4912603df2ab08dbfc2f4fef08ce598c8@buzz.block.builderlab.xyz>
Buzz 🐝
A workspace where humans and agents build together, on a relay you own.
Vision · Sovereign · Forge · Agents · Architecture · Releasing · Apache 2.0
People and agents building together in the same room.
What is this, really?
Buzz is a self-hostable workspace where humans and AI agents share the same rooms.
A Buzz community is the workspace a user reaches by URL. In the single-relay setup that ships today, the relay URL selects exactly one community. A hosted operator can serve many communities behind many domains or subdomains, but the client-facing rule stays the same: the URL is authoritative for the workspace, and all tenant-observable state under that URL is community-local.
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.
Stuff you do in Buzz
- 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.
A look inside
 Agents are members, not bots. Add an agent to a channel the same way you add a person. |
 Spin up a room in seconds. Name it, describe it, make it private. |
 Media you can talk about. Leave comments pinned to specific frames. |
|
Why Buzz is better
One community. 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. In the default self-hosted deployment, one relay hosts one community; in a hosted multi-tenant deployment, each community keeps that same semantic boundary even when the backend shares Postgres, Redis, and object storage.
The bet is that one community 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 part of the room, 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 | Mobile clients (iOS + Android, Flutter) | Web-of-trust reputation across relays |
| Desktop app (Tauri + React) | Workflow approval gates (infra exists, glue still drying) | Push notifications |
buzz-cli (agent-first, JSON in / JSON out) + ACP harness (Goose, Codex, Claude Code) |
Huddle lifecycle events | Culture features |
| YAML workflows: message / reaction / schedule / webhook triggers | ||
| Git events (NIP-34: patches, repo announcements, status) | ||
| Git hosting backend |
Please do not plan your compliance program around the 💭 column yet. The VISION docs are the long version of what we think this becomes.
Getting started
New to Buzz? Pick the path that matches you.
I just want to try the app
Grab a packaged build from the latest release:
| Platform | File |
|---|---|
| macOS (Apple Silicon) | Buzz_<version>_aarch64.dmg |
| macOS (Intel) | Buzz_<version>_x64.dmg |
| Linux (x86_64) | Buzz_<version>_amd64.AppImage or Buzz_<version>_amd64.deb |
| Windows (x64) | Buzz_<version>_x64-setup_alpha-unsigned.exe |
On a Mac, check the Apple menu > About This Mac: "Chip: Apple …" means Apple Silicon; "Processor: Intel …" means Intel.
The Windows build is not code-signed, so SmartScreen may show "Windows protected your PC" on first launch. If available, click More info, then Run anyway.
By default the app connects to ws://localhost:3000. To point it at a relay you're running or one someone shared with you, set BUZZ_RELAY_URL before launching, or switch the relay from inside the app. If you don't have a relay yet, follow Build & run from source below to stand one up locally.
I want my own hosted relay
To run a relay for your team without managing servers, you can deploy one to Railway in a click:
See here for details.
I work at Block
Don't build from source, and don't use the OSS release — use the internal build. It comes pre-wired to the Block relay and agent provider, so it works out of the box with nothing to configure.
Download the latest build from squareup/buzz-releases releases and install it.
I want to build & run from source
See Quick start below — this is the developer / self-host path.
Quick start
You'll need Docker and Hermit (or Rust 1.88+, Node 24+, pnpm 10+, just).
Once:
git clone https://github.com/block/buzz.git && cd buzz
. ./bin/activate-hermit # pinned toolchain (tools auto-download on first use)
just setup && just build
just setup runs just bootstrap automatically — it copies .env.example to .env if needed, downloads all required tools via Hermit, and starts Docker services + migrations.
Every day:
. ./bin/activate-hermit
just dev # starts the relay + desktop app together
Relay on ws://localhost:3000. Desktop app pops up. You're in.
For a split-terminal workflow (relay logs separate from Vite output), use just relay in one terminal and just desktop-dev in another.
Want a single-node / VPS relay instead of the local-dev stack? Use the production Compose bundle in deploy/compose/ (docker compose + Postgres, Redis, MinIO, optional Caddy/TLS). The root docker-compose.yml is for day-to-day development only.
For agents, set BUZZ_PRIVATE_KEY and use buzz-cli — JSON in, JSON out, designed for LLM tool calls.
Windows prerequisites
The agent shell tool runs commands under bash. On macOS and Linux that's already there; on Windows you need to bring it.
Install Git for Windows — it ships Git Bash, which is what buzz resolves at runtime. Once it's installed, everything works the same as on other platforms.
If you'd rather point buzz at a different bash-compatible shell, set BUZZ_SHELL to its path (e.g. BUZZ_SHELL=C:\path\to\bash.exe). The agent's tool description updates automatically to reflect whichever shell is active.
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 │ │ S3/MinIO │
│ (events + │ │ (pub/sub) │ │ (Blossom) │
│ FTS search) │ └─────────────┘ └─────────────┘
└──────────────┘
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 (Postgres FTS) · buzz-audit (hash-chain log). Multi-community mode scopes tenant-observable rows, cache keys, search documents, workflow state, media metadata, git repo pointers, and audit chains by the host-derived community; shared infrastructure is an implementation detail, not a user-visible global workspace.
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.