Changes in version 0.1.9                        

  - Fixed two issues related to rare scenarios that resulted in the
    query being incorrectly identified.

                 Changes in version 0.1.8 (2025-10-27)                  

  - Fixed an issue where some identifiable queries were incorrectly
    deemed nonidentifiable when multiple counterfactual variables shared
    a compatible subscript.
      - Updated igraph related functionality to use non-deprecated
        functions.

                 Changes in version 0.1.7 (2023-11-27)                  

  - Fixed some formulas having incorrect variables indicated as
    summation variables.

                 Changes in version 0.1.6 (2023-11-13)                  

  - Summation variables are now properly distinguished from query
    variables in the output formulas of identifiable().
      - Inputs for causal_effects() are now validated.
      - Fixed a rare issue that could result in duplicate variables in
        the output distributions.
      - Fixed an issue where some identifiable but inconsistent queries
        were reported as nonidentifiable.

                        Changes in version 0.1.5                        

  - Added missing value assignments to the query for causal_effect().

                 Changes in version 0.1.4 (2022-10-26)                  

  - Fixed an issue related to fixed variables in the counterfactual
    graph.
      - Fixed an issue related to counterfactual graph generation and
        equivalence of random variables.
      - Now uses lower case and snake case for classes.
      - Added the ID and IDC algorithms for a full identification
        pipeline. These algorithms can be used directly via
        causal_effect().
      - The syntax used by dag() is now more flexible, allowing edges
        within subgraph definitions and nested subgraphs.
      - Dropped dependency on R version 4.1.0.
      - Improved the package documentation.
      - Changed the default value of var_sep argument.

                        Changes in version 0.1.3                        

  - An identifiable conditional counterfactual of the form
    P(gamma)/P(gamma) will have value 1 instead of the formula.
      - Fixed an error when identifying conditional counterfactuals that
        had common counterfactual variables.
      - Inputs for identifiable() are now checked more thoroughly.
      - Added additional package tests.
      - Further refined documentation in general.
      - Fixed an internal indexing issue when no bidirected edges were
        present in a DAG.
      - Added documentation for format.probability() with examples.
      - Added citation to Shpitser and Pearl (2007). "What
        counterfactuals can be tested".
      - The package now correctly lists dependency on R >= 4.1.0.
      - Added NEWS.

                 Changes in version 0.1.2 (2021-06-10)                  

  - Added package documentation.
      - Improved documentation of existing functions.
      - Added support for more graph export formats.

                        Changes in version 0.1.0                        

  - Initial version.