Sweepline

Sweepline is a gesture-based dispatch tool for people, spaces, and systems.

Connect to your own server running at home — or one shared to you by friends or family — then send signal events with directional sweeps or taps. A simple gesture can acknowledge a request, unlock a workflow, hand off responsibility, or trigger a physical system connected to the saved endpoint.

Sweepline is intentionally small — like a Unix utility for your fingers.

There is no feed, profile system, or social network. The app enables team communication, but does not offer direct messages, a buddy list, or require logging into a centralized service. Sweepline does its best remembering ed25519 private keys, speaking http, and getting out of the way.

Endpoint servers (anyone can make these) define their own meaning:

• a swipe might open a door
• dispense candy from a gumball machine
• turn on the lights
• acknowledge a request
• dispatch assistance
• mark a zone active
• start workflows in systems you already use

Messages are signed by default using per-service cryptographic keys so endpoint operators can verify where events came from without requiring any external identity provider. Your server can ignore these signatures while prototyping (if you want to jump into building features instead) — later you can lock down the implementation to recognize signatures from trusted devices only.

Sweepline works well with:

• self-hosted servers
• Raspberry Pi projects
• volunteer shift tracking and informal help requests
• pickup sports availability and score tracking
• formal or informal clock-in/clock-out
• maker-space infrastructure
• studio and workshop lighting and controls
• interactive art installations

The protocol is intentionally small and open.
The goal is deliberate, low-friction signaling across independent systems.
Your private keys always stay on your device.

Sweepline carries the gesture.
Endpoints make the move.