ShiftPQC™ is an enterprise-grade diagnostic wedge designed specifically for tier-one consultancies to automate FIPS 203 Post-Quantum Cryptography (PQC) readiness audits for Fortune 500 companies. Deployed entirely out-of-band via a secure Bring Your Own Cloud (BYOC) container, it requires zero access to a client's private keys or live data plane, completely bypassing standard enterprise security friction. By plugging read-only APIs directly into the client's cloud environments and CI/CD pipelines, the platform instantly generates a Cryptographic Bill of Materials (CBOM) and a mathematical blast radius dependency graph. For consultancies, this transforms a manual, six-month infrastructure audit into a 48-hour automated scan that proves exactly which consumer-facing APIs and payment gateways will crash during a mandated cryptographic migration, providing the irrefutable data needed to close massive remediation engagements and protect the client's consumer brand trust.