Section Lifetime Divergence

Kind: constraint

Layer: Execution Core

Record: architecture:section-lifetime-divergence

Severity: recommended

Scope: surface, section

Canonical: Ontology

A rule or precondition that a file states a default lifetime and each section declares only the axes on which it differs, since the narrower unit is the more constrained one.

Listed in Architecture principles, after Independent Lifetime Axes and before Write Scope and Read Population.

Requires

• Retention
• Mutability

Reinforces

• Independent Lifetime Axes

Enables

• Governed Removal

Violated by

• File-Wide Lifetime

Refactored by

• Declare the File Default
• Declare Each Divergent Section

Severity

• recommended

Category

• Coordination Surfaces

Linked from

• Coordination Surfaces
• Coordination Surfaces
• Severity levels

in this codebase

• models/coordination.model.md