/// Returns the user's home directory. Checks `HOME` first (Unix), then
/// `USERPROFILE` (Windows), then falls back to `"."`. Use this everywhere a
/// `~/.bctx` path is resolved so the data dir works on Windows too.
pub use TokenEstimator;
pub use RawSignal;
pub use SignalKind;
pub use LocalSubstrate;
pub use Substrate;
pub use ExecutionRecord;