Contain And Continue: A Sign-First Alternative to Logical-Qubit Error Attribution

Foundational — Contain And Continue: A Sign-First Alternative to Logical-Qubit Error Attribution. This article reframes late logical-qubit error attribution as an earlier sign-continuity and typed-blockage problem, replacing generic downstream repair language with a contain-and-continue stack built from Fuzzy probing, SEB, STLF, STLF_0S, SoZ, and MAP. The main engineering advance is the split-zero grammar in which 0T records true admissibility failure and 0S records shadow occupancy or failed commitment with continuity-only sign carry, allowing the chain to remain readable without promoting shadow structure into evidence. The result is a cleaner operational answer to late verification-heavy qubit handling and a reusable middle-layer discipline that also points forward to QCore as the broader architectural solution.