Return Boundary

Evening Warmth → Pre-Sleep Transition — Descent into ASB

Definition

The Return Boundary marks the moment when the human system transitions from outward-directed coherence → inward warmth. It prepares the field for Sleep Boundary.

Conditions

• warmth increases while attention diffuses
• aura thickens and becomes more enveloping
• Ψ(t) flattens into stillness-prep
• ΔR nears the Sleep Threshold

Function

Return Boundary signals all ambient systems to reduce tempo, soften colour, remove cognitive demand, and begin the warm-down cycle.

Why It Matters

Evening collapse in modern life is not fatigue — it is the environment violating the boundary. Ambient systems repair this: evenings become restoration instead of failure.

Canonical Position

• Follows: Descent Boundary
• Precedes: Ambient Sleep Boundary (ASB)
• Enabled by: warmth cycle, ΔR low, Ψ(t) stabilization

Ambient Architecture