====== 10.1 Purpose of the Node Pattern ======

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The Node implementation pattern helps the team create runtime participants that behave consistently across the Phase 0 Node network. Each Node may represent a different logical role, but every Node should follow the same basic implementation discipline.

The pattern supports four practical goals:

  - Make each Node easy to build, run, observe, and stop.
  - Make each Node report its operational state through the [[dido:99_annexes:annex-b-terms-and-definitions:c:control_plane|Control Plane]].
  - Make each Node traceable to a logical role in the architecture and the FX Demo Logical Profile.
  - Make Node behavior reviewable, testable, and repeatable across developer workstations, test environments, containers, and demonstration environments.

Phase 0 Nodes do not need to implement full financial processing. They need to prove that defined Node Roles can become executable participants in a distributed Node network. A Phase 0 Node should therefore implement enough Lifecycle behavior, Control Plane participation, Configuration, logging, and Exception Handling to demonstrate the implementation pattern.

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