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CephalonEngine

Cephalon.Observability.NatsDependencies

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Maturity: M0 · Ownership: taxonomy-only · Family: observability · See audit, matrix.

Cephalon.Observability.NatsDependencies is the reusable dependency-health companion package for NATS brokers and clusters.

What it owns

Section titled “What it owns”
  • Engine:Observability:DependencyHealth:Nats option binding
  • reusable NATS CONNECT plus PING/PONG probe flow
  • token or username/password authentication wiring for broker reachability checks
  • diagnostics conventions and runtime dependency-health contributions for NATS endpoints

Main surfaces

Section titled “Main surfaces”
  • Configuration/NatsDependencyDefinition.cs
  • Configuration/NatsDependencyHealthOptions.cs
  • Hosting/NatsDependencyHealthServiceCollectionExtensions.cs

Source structure

Section titled “Source structure”
  • Configuration
  • Hosting
  • Services

How it fits

Section titled “How it fits”

This package stays outside Cephalon.Engine and turns configured NATS endpoints into IDependencyHealthContributor data. Hosts keep the shared runtime health and readiness semantics from the engine, while this companion handles the provider-specific wire exchange: read the initial INFO line, send CONNECT, and verify a successful PING/PONG round-trip. Pair it with Cephalon.Eventing when a host wants broker-aware operational checks without pushing NATS socket details into the engine core.

This pack can grow across NATS-native protocol semantics such as richer auth modes, TLS controls, server-list handling, and broker reachability checks. If future work needs deeper workload semantics above the transport layer, keep that split deliberate instead of silently turning the baseline NATS probe pack into a product-specific runtime.

Section titled “Related docs”