Lexical contour protection layer of RET preserving canonical terminology, anti-mapping boundaries, and semantic inversion resistance.

Active motion-responsibility layer of RET: reversible relational protocol families for presence, distance, silence, and response.

Transition constraint layer of RET preserving reopenable, non-final transitions through degrade, freeze, and closure vocabularies.

A RET bridge-layer fragment defining reversible distance adjustments that preserve relational continuity without interpreting intent, meaning, or behavior.