New e2e/ package wires the REAL P5(auth)+P4(crypto)+P2(agent) exports through in-memory seams and an untrusted-relay attacker vantage (RelaySpy). Dynamically re-validates F1–F4/F6 plus MITM/reflection/replay/reorder/INV2/cross-tenant/ single-use — every assertion runs the production code path. 21 tests green, tsc clean. node_modules via symlinks (gitignored); no npm install needed.