J3vbandClaude Fable 5 fb5b058ee4 test(b3-6): seeded hub simulation with a six-part FIFO/seq oracle, fault-injected transport, exact seed replay (Tier 3b/3c) (#1458)
* test(b3-6): seeded hub simulation and fault-injected transport (items 2 and 3)

Server/ws/hub_sim_test.go drives a PCG-seeded interleaving of subscribe,
broadcast (global, channel, recipients-scoped, sequenced DM), ack, disconnect
and reconnect-transfer over a real Hub with eight headless clients, and a
model client checks the per-client FIFO/seq oracle from Server/CLAUDE.md
after every step: strictly increasing seq per connection, exact audience
delivery (nothing lost, extra or twice), a resume replayed exactly from the
watermark to the seq at which registerNow ran, h.seq advancing only for a
frame that reached the ring, an evicted watermark refused a replay, and a
replaced socket's late teardown reporting replaced=true. The resume step runs
reconnectRegister as-is (snapshot and registerNow under one seqMu section)
on a goroutine while up to three broadcasts race it; the model recovers the
snapshot point from the replay burst, so any interleaving is checkable.

OWNCORD_SIM_SEED replays one seed, OWNCORD_SIM_SEEDS (default 20) and
OWNCORD_SIM_STEPS (default 200) size a run, and a failure prints the seed,
the step, a ready-to-paste replay line and the last steps. The default runs
in about 2.3 s under -race; `make sim` runs 10,000 steps per seed.

Server/ws/faultconn_test.go is the seeded, deterministic frame transport the
simulation reads through: drop, tail cut, duplicate, bounded reorder and an
order-preserving lag from its own PCG stream, exported to ws_test through
export_test.go as NewFaultConnForTest. The simulation's default wire is a lag
plus tail cuts, the one fault a TCP-backed WebSocket really has; the silent
drop is the negative control that proves the oracle notices a lost replay.

BenchmarkReconnectStorm resumes 50 live clients per op through the same
path. newTestHub and its three seed helpers take testing.TB so the benchmark
can share them. No production code changes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KmiqjgTuov1stBTB6uGkvo

* docs(b3-6): evidence block for items 2 and 3 (hub simulation, fault transport)

Oracle, the RED/GREEN excerpts (inverted assertion, seed replay, drop-all
wire, unsynchronized registerNow), wall-clock and benchmark figures, gate
results and the epoch-harness decision, under B3-6 in the plan.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KmiqjgTuov1stBTB6uGkvo

* fix(b3-6): hub sim — deterministic topic limiter for exact replay, a floor on the step mix, auth-frame-wins under transfer, wire-seed mixing

Review fixes for items 2 and 3.

Exact replay. TopicRateLimiter keys its window on time.Now(), so at 10,000
steps the shed boundary was a timing-dependent step and every later seq
differed between runs; the printed OWNCORD_SIM_SEED line could not reproduce
a failure. FreezeTopicLimiterForTest (export_test.go) swaps the hub's limiter
for one whose window never rolls over inside a run, so the shed is a
per-channel count. Three more leaks of the scheduler's interleaving into the
trajectory surfaced once that was fixed, and are closed the same way — by
taking the decision away from the race or making both outcomes read the
same: racing frames are pulled into the wire at attach time (queue fill no
longer depends on which side of the snapshot they fell), the racing burst is
aimed at the resuming client's own audience (a replay-superset frame was
read iff it landed before the snapshot), and a resume within the burst's
reach of the ring's eviction boundary is not raced (the allocations could
evict the watermark before or after the snapshot and pick replay or
fallback). Three runs of one seed now print byte-identical stats; what still
varies — how many racing seqs land in the replay burst — is printed on its
own line and stated in the doc comment.

Floor. TestHubSimulation aggregates the per-seed stats and requires every
load-bearing transition (the four broadcast kinds, resume, fallback, fresh,
cut, kicked, racing-in-replay) at least once across the default run, so a
constant change cannot turn the simulation into no-ops with CI green. Its
first run found that the overflow kick had become unreachable at 200 steps;
the sim's queue is 12 now (production stays 256).

Also: the resume step draws active_channel_id as none / the open channel /
another channel whether or not the old socket is registered, so registerNow's
auth-frame-wins branch runs under the transfer; the wire's PCG takes the seed
and (idx<<32|conns) as its two words instead of an arithmetic mix that
collided past 131 connections; seedTestUser takes testing.TB like its
siblings; the evidence block lists what the simulation does not cover and the
-timeout 60m the ten-pass deadlock gate needs, with the same line under
Traps carried forward.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KmiqjgTuov1stBTB6uGkvo

* test(b3-6): hub sim — floor on raced resumes instead of the scheduler-decided key; log when the floor is skipped

racing-in-replay was the one floor key the scheduler decides, so a correct hub could in principle fail the floor on a run where no racing seq landed inside a burst. The floor now keys on raced resumes — a resume that got a replay while a burst ran (burst > 0 && ok), which the seed determines — and racing-in-replay stays a printed count. The floor also says so when it is skipped for OWNCORD_SIM_SEED or a shorter seed list instead of returning silently.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Claude-Session: https://claude.ai/code/session_01KmiqjgTuov1stBTB6uGkvo

* test(b3-6): hub sim — raced counts a broadcast allocated while registration was in progress, not the requested burst

Codex P2 on #1458: raced incremented on burst > 0, which counted a resume whose goroutine had returned before the first broadcast ran and one whose every channel broadcast the limiter shed, so the floor could pass with no broadcast overlapping a registration. raced now counts a resume where a racing broadcast allocated a seq while the reconnect goroutine had not yet been observed to return (the driver's done handshake, checked after each allocation). That is the scheduler's call, so raced moves off the deterministic stats line and is floored only in aggregate across the 20 default seeds — 179 bursts per run, 178–179 observed overlapping in three measured runs, odds named in the comment and the evidence block. The requested burst stays a printed, seed-determined count (bursts) and is floored as before; the floor logs its totals.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Claude-Session: https://claude.ai/code/session_01KmiqjgTuov1stBTB6uGkvo

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
2026-08-30 14:57:34 +00:00
2026-08-27 21:37:40 +02:00

CI Release Status Go Tauri Platforms License: AGPL-3.0

OwnCord

A self-hosted chat app I build for me and my friends — text channels, voice and video, and a server you actually own.

Alpha, and a hobby project. This is something I build for fun and run for a small group of friends. It isn't a product, it comes with no support commitment, and it isn't production-ready. Expect rough edges, rapid changes, and the occasional breaking change.

Don't use it for anything sensitive.

It's a Go server plus a Tauri desktop client: real-time messaging, voice/video via LiveKit, file sharing, and a web admin panel. Run the server on a spare box or a VPS, hand your friends an invite code, and that's the whole thing.

OwnCord Client

Login Page Admin Panel

How it's built

Most of the implementation is generated with AI tooling, with quality held up by automated checks — CI, tests, linting — and by me and my friends actually using it. That keeps iteration fast, and it also means behaviour can change quickly between releases.

What works right now

Area Status
Core chat flow Working in alpha
Voice/video Working in alpha
Admin panel Working in alpha
Security hardening Ongoing review passes; findings and their statuses are tracked in the dated audits in docs/ (see the Docs Index below)

Platform Support (Current Releases)

Component Windows x64 Linux x64 Linux ARM64
Server binary Yes Yes Not yet
Desktop client Yes (NSIS installer) Yes (AppImage, .deb) Yes (AppImage, .deb)
Docker server N/A Build from source (compose) Not yet

Start Here

Quick Start

Option A: Prebuilt binaries

  1. Download assets from Releases (binaries, checksums, signatures, and a full source snapshot per release).
  2. Run the server binary:
    • Windows: chatserver.exe
    • Linux: ./chatserver
  3. Open https://localhost:8443/admin and complete the setup wizard — it creates your Owner account and configures the server for you (settings are saved to config.yaml automatically).
  4. Generate invite codes in the admin panel and share them with friends.

Option B: Docker (Linux server)

cd Server
cp .env.example .env
cp livekit.yaml.example livekit.yaml
# Edit both files before starting
docker compose up -d

See the full setup guide in docs/deployment.md.

The client uses TOFU (Trust On First Use) for self-signed certificates: it prompts once, then pins the certificate for future connections.

What OwnCord Already Has

  • Real-time channels and direct messages over WebSocket
  • Voice/video channels via LiveKit — the LiveKit server binary is downloaded and managed for you
  • Invite-only registration and role-based permissions
  • Web admin panel with logs, backups, and update tooling
  • File uploads and inline media rendering
  • TOTP 2FA support and API rate limiting
  • Desktop client auto-update with signature verification
  • WASM plugin system (slash commands; sandboxed, default-disabled — enable via plugins.enabled and build with -tags wazero)
  • GIF picker — off by default; each server supplies its own Klipy key via gif.api_key (setup)

See deeper feature and architecture docs in docs/architecture/ and docs/protocol.md.

Architecture

Two main components:

  • Go server (REST API, WebSocket hub, SQLite, admin panel)
  • Tauri v2 desktop client (Rust backend + TypeScript frontend)
+---------------------+         +---------------------+
|   OwnCord Client    |         |   OwnCord Server    |
|   (Tauri v2)        |         |       (Go)          |
|                     |         |                     |
|  +---------------+  |  WSS    |  +---------------+  |
|  |  Chat UI      |--+------->|  |  WebSocket Hub|  |
|  +---------------+  |         |  +---------------+  |
|  +---------------+  |  HTTPS  |  +---------------+  |
|  |  REST Client  |--+------->|  |  REST API     |  |
|  +---------------+  |         |  +---------------+  |
|  +---------------+  | LiveKit |  +---------------+  |
|  |  Voice/Video  |--+------->|  |  LiveKit SFU  |  |
|  +---------------+  |         |  +---------------+  |
+---------------------+         |  +---------------+  |
                                |  |  SQLite DB    |  |
                                |  +---------------+  |
                                +---------------------+

Build and Test

Prerequisites

  • Go 1.26+
  • Node.js 24+ (see Client/.nvmrc)
  • Rust stable (client builds)

Build from source

# Server (Windows)
cd Server
go build -o chatserver.exe -ldflags "-s -w -X main.version=1.2.0-alpha.4" .

# Server (Linux)
cd Server
CGO_ENABLED=0 go build -o chatserver -ldflags "-s -w -X main.version=1.2.0-alpha.4" .

# Client
cd Client
npm install
npm run tauri build

Core verification commands

Everything CI gates on, from the repository root:

npm run check                  # server + client + Rust
npm run check:server           # or one stack at a time
node scripts/run.mjs --list    # exactly what each task runs, and where

Or run the stacks directly — the facade is a convenience, not the only path, and server work needs no Node at all:

# Server
cd Server
go test ./...

# Client
cd Client
npm run typecheck
npm run lint
npm test

For the full command set, use docs/contributing.md.

Configuration

On first run, the server generates config.yaml and a local data/ directory:

data/
├── chatserver.db
├── certs/
├── uploads/
└── backups/

Key options include TLS mode, upload limits, LiveKit settings, and admin CIDR restrictions. See docs/server-configuration.md.

Security and Vulnerability Reporting

  • For vulnerabilities, use GitHub Security Advisories (private disclosure flow).
  • Do not open public issues for security bugs.
  • Read full policy and hardening notes in docs/security.md.

Update Signing Notes (Maintainers)

Client and server update signing keys are intentionally separate.

Required Actions secrets for release signing:

  • TAURI_SIGNING_PRIVATE_KEY
  • TAURI_SIGNING_PRIVATE_KEY_PASSWORD
  • SERVER_UPDATE_SIGNING_PRIVATE_KEY
  • SERVER_UPDATE_SIGNING_PRIVATE_KEY_PASSWORD

When rotating the server updater key, update Server/updater/server_update_public_key.txt and use staged rollover for live fleets.

Docs Index

docs/README.md is the complete index — every document in docs/, grouped by whether it is guidance, a reference contract, a dated audit, or a plan. The most-used entries:

Audits are dated snapshots and are not maintained after the fact — read them as history. docs/README.md lists all nine, newest first.

Contributing

  1. Create a branch from dev (the active development branch).
  2. Keep changes focused and tested.
  3. Open a PR targeting devdev is merged to main for releases.

See docs/contributing.md for the full process.

Getting Help and Reporting Problems

Nothing here is a support promise — see the note at the top — but there is a right place for each kind of message:

Kind Where
A reproducible bug Issues
A question about setup or usage Discussions → Q&A
An idea or feature suggestion Discussions → Ideas
A security vulnerability Private advisory — never an issue

License

AGPL-3.0

S
Description
OwnCord is a self-hosted, open-source chat platform with text channels, voice/video chat, direct messages, and a desktop client — built for communities that want full control over their data.
Readme AGPL-3.0
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