igoR 1.1.0

• The minimum required R version is now 4.1.0.
• igoR::states2024 replaces states2016 with State System Membership data through December 2024.

igoR 1.0.3

• Internal code paths were simplified with AI-assisted refactoring to reduce duplicated result handling, status validation and dyad-year joint membership recoding.
• igo_dyadic() now computes dyadid with both state codes, as documented.
• User-facing messages were revised for clearer wording and consistent argument names.

igoR 1.0.2

• Package documentation was reviewed and updated with AI-assisted editing.

igoR 1.0.1

• Updated the COPYRIGHTS file.
• Migrated documentation and vignettes to Quarto.

igoR 1.0.0

First major version of the package.

• The minimum R version required is now 3.6.0. No visible change for users.

igoR 0.2.1

• Updated documentation.

igoR 0.2.0

• Refactored internal code without user-visible changes.
• Updated documentation and basic package maintenance.
• igo_dyadic() now also accepts a vector of states in the country1 argument.
• igo_recode_igoyear(), igo_recode_stateyear() and igo_recode_dyadic() are new helper functions for converting numerical membership codes to factor labels.

igoR 0.1.5

• Updated documentation and examples.

igoR 0.1.4

• Updated documentation due to a CRAN notice.

igoR 0.1.3

• Updated documentation.

igoR 0.1.2

• Compiled the “Mapping IGOs” article as a vignette.
• Updated documentation. It is now in Markdown format using roxygen2md::roxygen2md().
• Moved tests to testthat.

igoR 0.1.1

• Removed lifecycle badge.

igoR 0.1.0

• Generalized search to ignore case.
• Additional vignettes are available on the website.
• cow_country_codes is now internal.
• igo_dyadic() was added.
• igo_members() was vectorized.
• igo_search_states() was added.
• igo_state_membership() was added.