RC-1 — Residue Communication A Reversible Continuity Layer Between Stateless Interaction and Total Storage Continuity Through Chromatic Afterfields in Messaging, Telephony, and Interface Systems

Abstract Residue Communication formalizes a reversible continuity layer for ambient systems in which interaction does not end at transmission. Instead of vanishing into near-zero continuity or collapsing into full symbolic archive, messages, calls, and interface events settle into carried chromatic residues: bounded post-symbolic continuity carriers that preserve relational tone, semantic temperature, drift tendency, and continuity of presence without requiring full textual retention. RC-1 defines a third communication regime in which continuity is carried by residue rather than by exhaustive symbolic storage. This residue is smaller than summary and greater than zero: sufficient to carry future interaction forward, but bounded and reversible by design. The paper extends this claim across messaging, telephony, group fields, and generative interfaces, arguing that future communication and interface emergence can arise from what previous interaction gently left behind. RC-1 therefore establishes residue as the continuity operator linking state-first communication to ambient interface systems.