3.0 Overview

The Rust mesh layer translates design into deployable code. Each node composes traits from SystemZero, synchronizes via gRPC/QUIC, and self-heals through matrix replication logic.

3.0.1 Module Overview

Project structure follows layered modules for clear separation:

src/
 ├── main.rs
 ├── traits/
 │    ├── data.rs
 │    ├── reactive.rs
 │    ├── cell.rs
 ├── mesh/
 │    ├── node.rs
 │    ├── delta.rs
 │    ├── election.rs
 │    ├── transport.rs
 └── platform/
      ├── ibm.rs
      ├── config.rs
      └── telemetry.rs

3.0.2 Build Manifest (Cargo.toml)

[dependencies]
tokio = { version = "1", features = ["full"] }
tonic = "0.12"
prost = "0.13"
quinn = "0.11"
serde = { version = "1", features = ["derive"] }
tracing = "0.1"
anyhow = "1"

3.0.3 Service Bootstrapping

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    telemetry::init();
    platform::ibm::discover_region().await?;
    mesh::node::start().await
}

3.1 IBM Cloud Regions, Zones, and HA Topology (MZR, multi-AZ) : [U2]

Implements IBM zone awareness and failover logic for deployment automation.

[U2] : https://cloud.ibm.com/docs/vpc?topic=vpc-about-vpc

3.1.1 Region Discovery

pub async fn discover_region() -> anyhow::Result<String> {
    let region = std::env::var("IBM_REGION")
        .unwrap_or_else(|_| "us-south".into());
    tracing::info!("Detected region: {}", region);
    Ok(region)
}

3.1.2 Zone Metadata Caching

Regions cache their zone topology for fast node provisioning.

#[derive(Serialize, Deserialize)]
pub struct ZoneInfo {
    pub zone: String,
    pub latency_ms: u32,
}