Joinable Mandated Field

Kind: constraint

Layer: Execution Core

Record: architecture:joinable-mandated-field

Severity: recommended

Scope: field, schema

Canonical: Ontology

A rule or precondition that a mandated field takes a value from a closed set or an identifier, or declares that it is written for readers, so a governed surface never looks measured on a property nothing can read.

Listed in Architecture principles, after Carrier and Payload Split and before Single Aggregate.

Requires

• Carrier Field

Reinforces

• Carrier and Payload Split

Enables

• Traceable Guarantee

Violated by

• Unread Prose Mandate

Refactored by

• Draw the Value from a Closed Set
• Declare the Field for Readers

Severity

• recommended

Category

• Coordination Surfaces

Linked from

• Coordination Surfaces
• Coordination Surfaces
• Severity levels

in this codebase

• models/coordination.model.md