//! Catches workspace-version drift in CI.
//!
//! Asserts that `mnemo-core`'s compiled `CARGO_PKG_VERSION` matches the
//! version stamped into the workspace `Cargo.toml` (since every crate
//! inherits `version.workspace = true`, this transitively asserts that
//! every published crate ships with the same version).
//!
//! This is the U1 regression test for v0.4.2 — see
//! [docs/compat/version-skew-matrix.md](../../docs/compat/version-skew-matrix.md).