Changes in version 0.1.0 (2026-05-13)                  

Initial release

  - audit_transform() — step-based audit engine for quantifying variable
    change across arbitrary administrative boundary transformations.
    Accepts a list of step_* functions and returns an audit_result
    object with baseline total, final total, delta, and per-step
    diagnostics.
  - step_aggregate() and related step_* helpers — composable
    transformation steps for building custom audit pipelines.
  - prep_hud_crosswalk() and prep_zip_zcta() — crosswalk cleaning and
    standardization utilities.
  - S3 methods for audit_result objects.
  - Vignettes: introduction, audit walkthrough, audit workflow,
    proportionality considerations.
  - Includes Hennepin County toy datasets in inst/extdata for running
    examples without external data dependencies.