Mylonite

Mylonite is a self-hosted sync server for Obsidian. Use it with the Mylonite plugin to pair devices and sync end-to-end encrypted vault data through your own storage.

_{Synchronization showcase using a remote server hundreds of kilometers away. Vault data remains end-to-end encrypted throughout the sync process.}

[!NOTE]
Mylonite is still in early development, expect bugs and breaking changes.

Server

Install the latest binary.

Debian/Ubuntu x86_64:

curl -fL -o /tmp/mylonite \
  https://github.com/z1xus/mylonite/releases/latest/download/mylonite-x86_64-unknown-linux-gnu
sudo install -m 0755 /tmp/mylonite /usr/local/bin/mylonite
mylonite --version

Other platforms: grab the matching binary from Releases and place it on your PATH.

Create the config and the first vault's pairing token:

mylonite init

Run the server:

mylonite serve

The default config lives at:

• Linux: ~/.config/mylonite/config.toml
• macOS: ~/Library/Application Support/mylonite/config.toml
• Windows: %APPDATA%\mylonite\config.toml

Keep listen = "127.0.0.1:9821" when a reverse proxy terminates TLS on the same host.
Use listen = "0.0.0.0:9821" and set public_url to the reachable URL if the server should accept direct connections.

Systemd

Drop this unit at /etc/systemd/system/mylonite.service, replacing YOUR_USER with the account that ran mylonite init:

[Unit]
Description=Mylonite sync server
After=network-online.target
Wants=network-online.target

[Service]
ExecStart=/usr/local/bin/mylonite serve
Restart=on-failure
User=YOUR_USER

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl enable --now mylonite
sudo systemctl status mylonite

Windows: run mylonite serve with NSSM, WinSW, or your preferred service wrapper.

Docker

docker run -p 9821:9821 \
  -v ./config.toml:/etc/mylonite/config.toml:ro \
  -v ./data:/var/lib/mylonite \
  ghcr.io/z1xus/mylonite:latest

Plugin

Install Mylonite from the Obsidian community plugin directory.

Beta install: install BRAT, then add https://github.com/Z1xus/mylonite as a beta plugin.

Manual install: download mylonite-obsidian-plugin.zip from Releases and extract it into:

<vault>/.obsidian/plugins/mylonite/

Enable Mylonite in Obsidian's community plugins list, then open its settings.

Pairing

The first device must be paired with the pairing token. Every other device joins through a short-lived invite approved by an already-paired device.

First device

1. Enter your server URL (and optionally your device label).
2. Paste the pairing token printed by mylonite init.
3. Click Pair.

Additional devices

1. On an already-paired device, open Mylonite settings -> Add another device -> Create. Mylonite shows a QR code, an invite code, and the server URL.
2. On the new device:

• If the camera is available, scan the QR code. It will open an invite page on your Mylonite server.
• Otherwise, type the server URL and invite code manually or paste the invite code.

3. Compare the six-digit safety code on both devices, then click Approve on the already-paired device.

If you ever lose access to every paired device, the vault data is unrecoverable — the encryption key was generated on the first device and the server only holds ciphertext. Wipe the dead vault and start fresh:

mylonite vault delete <vault_id>
mylonite vault create "My Vault"
# pair the new device with the freshly printed token

Develop

Requirements:

• Rust 1.85+
• Bun 1.2+

Run locally:

cargo run -p mylonite -- serve --config dev/config.toml
cargo run -p mylonite -- vault create "My Vault" --config dev/config.toml

Build the plugin:

cd plugin
bun install
bun run build

Run checks:

cargo fmt --check
cargo clippy -p mylonite --all-targets -- -D warnings
cargo test -p mylonite
cd plugin
bun run test
bun run build