This skill was consolidated into doc-validator in plugin v0.4.0. The
bidirectional traceability mechanics - >=95% symmetry scoring, orphan
detection, safe auto-fix with timestamped backup + rollback - are preserved
verbatim under doc-validator's traceability pass.
Migration: replace any trace-check <target> invocation with
/aidoc-flow:doc-validator <target> (traceability pass runs by default).
This stub will be removed in plugin v1.0.0.