Changes in version 2.1.2                        

Changes

  - Archived dynamic_broadcasting.qmd vignette - consolidated into
    dashboard_comprehensive.qmd which has all the same features plus
    better organization.

  - Simplified dashboard_comprehensive.qmd - moved documentation into
    Notes tab, removed redundant sections.

  - Updated telemetry vignette to handle missing coverage data
    gracefully.

                        Changes in version 2.1.0                        

Breaking Changes

  - sync_mode = "dynamic" and sync_mode = "mirai_dynamic" are now
    DEPRECATED. These modes silently fall back to static behavior
    because nanonext sockets cannot be created inside crew/mirai
    subprocesses (NNG fork boundary limitation). Use sync_mode =
    "chunked" instead for best collision detection (~15%).

  - Removed unused duckdb dependency from DESCRIPTION and all Nix files.

New Features

  - Added sync_mode = "chunked" - processes walkers in batches of 10
    with grid updates between batches. This is now the recommended mode
    for parallel simulations with collision detection.

  - New shell.nix for end users - uses builtins.fetchGit to install
    randomwalk directly from GitHub without requiring sha256 hashes.

  - Added R-universe badge to README for package availability status.

Bug Fixes

  - Fixed plot_grid() collision count display - now correctly checks
    collisions_detected field used by async modes, with fallback to
    multiple termination reason key names.

  - Fixed S3 plot() method signature to use x and ... to match the
    generic.

  - Fixed validation to properly respect boundary parameter using
    match.arg().

  - Fixed chunked mode to use numeric 1 instead of string for black
    pixels.

Documentation

  - Updated README sync_mode table with deprecation warnings for dynamic
    modes.

  - Updated dynamic_broadcasting_algorithm.md with explanation of why
    the socket-based approach failed.

  - Updated pkgdown home page title and navigation labels.

  - Fixed R-CMD-check badge URL (lowercase filename).

                        Changes in version 2.0.0                        

Major Changes

  - Complete rewrite with async parallel processing support via crew
    backend.

  - Added comprehensive statistics tracking with percentiles and
    formatting.

  - Added S3 plot methods - plot(result) works directly.

  - Added WebR/browser support via Shinylive dashboards.

  - Added multiple sync modes: static, chunked, dynamic, mirai_dynamic.

New Features

  - run_simulation() - main entry point with full parameter control.

  - plot_grid() - visualize final grid state with statistics.

  - plot_walker_paths() - visualize walker trajectories.

  - run_dashboard() - launch interactive Shiny dashboard (native R
    only).

  - format_statistics() - format simulation results for display.

Documentation

  - Added comprehensive vignettes: defensive programming, step
    distribution analysis, telemetry.

  - Added browser-based Shinylive dashboards for interactive demos.

  - Added pkgdown site at https://johngavin.github.io/randomwalk/

                        Changes in version 1.0.0                        

  - Initial release with basic random walk simulation.