Projection Channel

Kind: constraint

Layer: Execution Core

Record: architecture:projection-channel

Severity: mandatory

Scope: context, reader

Canonical: Ontology

A rule or precondition that the projection a host injects into every bounded reader is refreshed in the same change as the fact it carries, in a shape a check reads.

Listed in Architecture principles, after Operand-Free Outcome Surface and before Two-Direction Index.

Requires

• Host Projection
• Bounded Reader

Reinforces

• Single Source of Truth

Enables

• Traceable Guarantee

Violated by

• Deferred Projection
• Overgrown Projection

Refactored by

• Refresh the Projection in the Same Change
• Check the Projection's Shape

Severity

• mandatory

Category

• Coordination Surfaces

Linked from

• Schema / Canonical Data / Semantics
• Coordination Surfaces
• Severity levels

in this codebase

• models/coordination.model.md