Independent Lifetime Axes

Kind: principle

Layer: Execution Core

Record: architecture:independent-lifetime-axes

Severity: mandatory

Scope: surface, lifetime

Canonical: Ontology

A design rule that a surface's lifetime is declared on three independent axes, retention, mutability and removal authority, each taking a value from a closed set, so no single word stands for all three.

Listed in Architecture principles, after Two-Direction Index and before Section Lifetime Divergence.

Requires

• Retention
• Mutability
• Removal Authority

Reinforces

• Immutability

Enables

• Governed Removal

Conflicts with

• Destructive Closure

Contracts

• Convergence Walk
• Lifetime Resolution

Violated by

• Single-Word Lifetime

Refactored by

• Declare All Three Lifetime Axes

Severity

• mandatory

Category

• Coordination Surfaces

Reinforced by

• Section Lifetime Divergence

Linked from

• Correctness / Determinism / Verification
• Coordination Surfaces
• Coordination Surfaces
• Coordination
• Severity levels

in this codebase

• axisConsumers
• silentOnItsOwnAxis
• models/coordination.model.md