Open-source C4ISR data fabric for autonomous fleet management. The most efficient way to build tactical awareness systems for drones, aircraft, robots, and everything in between.

Pulsar is the single-binary edge agent that connects ground control stations to Constellation Overwatch. It handles fleet registration, MAVLink telemetry relay, RTSP video bridging, and on-device YOLO detection — all in one process.

# Install
git clone https://github.com/Constellation-Overwatch/pulsar.git && cd pulsar
cp .env.example .env   # Add your C4_API_KEY, C4_BASE_URL, C4_NATS_KEY

# Run (guided setup creates config/fleet.yaml on first boot)
task dev

Or grab a prebuilt binary from Releases:

curl -L https://github.com/Constellation-Overwatch/pulsar/releases/latest/download/pulsar_linux_amd64.tar.gz | tar xz
./pulsar

What Pulsar does:

• Declarative Fleet Config — Define entities in fleet.yaml, Pulsar registers and reconciles with Overwatch automatically
• MAVLink Relay — Per-entity UDP listeners with auto-assigned sequential ports from any MAVLink source
• NATS JetStream — Durable telemetry streaming on constellation.telemetry.{entity_id}.{msg_type} with KV state aggregation
• RTSP Video Bridge — Per-entity video relay with MediaMTX integration or embedded fallback
• On-Device Detection — ONNX/YOLO inference with bounding-box overlay (build-tag gated, zero overhead when disabled)
• Live Sync Loop — Watches config for changes, re-registers and restarts services without downtime

fleet.yaml (desired)    .env (credentials)    c4.json (actual)
       |                       |                     |
       v                       v                     v
                    Pulsar Reconciliation
                    (register + resolve)
                            |
             +--------------+--------------+
             |              |              |
             v              v              v
       MAVLink Relay   Video Bridge    Detector
       (UDP per-entity) (RTSP bridge)  (ONNX/YOLO)
             |
             v
       NATS JetStream
       (telemetry + KV state)

Constellation Overwatch is the distributed command and control backend. Edge, cloud, or hybrid.

• Real-time Telemetry — Native MAVLink protocol with NATS JetStream for durable streaming
• Ontological Mesh — Multi-org, multi-entity pub/sub architecture without conflicts
• MAVLink Compatible — Fully backwards compatible with PX4/ArduPilot, built for autonomous swarms
• Open Contribution — Take your seat at the table and contribute to the future of autonomous C4ISR

git clone https://github.com/Constellation-Overwatch/constellation-overwatch.git
go run ./cmd/microlith/main.go

• Quickstart Guide — Deploy in minutes
• API Reference — Manage organizations and entities programmatically
• Pulsar Docs — Edge agent setup, fleet config, and video pipeline

• Aircraft — Fixed-wing, eVTOL, airships with PX4/ArduPilot integration
• Drones — Class 1-3 multirotors, hexacopters, swing-wing configurations
• Robots — Humanoids, quadrupeds, amphibious systems with sensor fusion
• Edge Systems — RTSP cameras, USB sensors, serial devices via unified fabric

• AuthN/AuthZ for onboard flight controllers and firmware
• CMD_MSG pack and auto-gen orchestration for swarms
• Rapid response manufacturing with edge and additive materials
• Post-quantum encryption
• Meshtastic and fully off-grid eLRS/radio-based mesh

Join us on GitHub Discussions to collaborate on autonomous systems, share tactical insights, and discuss best practices.