Changes in version 0.1.0                        

Breaking changes

  - Cache directory now uses platform-appropriate location via rappdirs:
    macOS ~/Library/Caches/templateflow, Windows AppData/Local. Set
    TEMPLATEFLOW_HOME to override.

New features

  - Custom error conditions (templateflow_error,
    templateflow_network_error, templateflow_not_found,
    templateflow_invalid_filter, templateflow_cache_error) for
    structured error handling with tryCatch().
  - Migrated HTTP backend from httr to httr2 with automatic retry and
    exponential backoff on transient failures.
  - Atomic file writes prevent partial/corrupt downloads.
  - Config-driven layout parsing from config.json instead of hardcoded
    entities.
  - tf_ls() gains as_df parameter to return results as a data frame.
  - tf_get() gains read parameter to return neuroimaging objects
    directly using RNifti, oro.nifti, or gifti when available.
  - tf_prefetch() batch-downloads all zero-byte skeleton stubs.
  - tf_cache_stats(), tf_cache_scan(), tf_cache_refresh() cache
    utilities.
  - Fuzzy entity name matching with suggestions on typos.
  - Full CLI rewrite with 9 subcommands: config, ls, get, wipe, update,
    meta, cite, refresh, doctor.
  - DataLad backend support via TEMPLATEFLOW_USE_DATALAD environment
    variable.
  - Neuroimaging file reader dispatch (tf_read_file()) for NIfTI, GIFTI,
    JSON, TSV.

Bug fixes

  - print.TemplateFlowClient now correctly returns invisible(x).
  - Roxygen annotation for print.TemplateFlowClient moved to proper
    location.

                        Changes in version 0.0.1                        

  - Initial release with S3-backed template querying and caching.