Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

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  • Allow matching bare fn args as list
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    Tehforsch/molt#3 ·

  • Allow matching on or-connected patterns as a list
    Open

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/molt#2 ·

  • Allow adding attributes to variables
    Open

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    Tehforsch/molt#1 ·

  • Doc-tests trigger ICE on current nightly
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    Tehforsch/diman#91 · 2 comments ·

  • Improve quantity creation with stabilized `const_fn_floating_point_arithmetic`
    Open
    code-quality enhancement

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Tehforsch/diman#85 ·

  • impl `num_traits` for `Quantity`.
    Open
    enhancement

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#69 ·

  • Better unit selection in `Debug` impl
    Open
    ergonomics

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#67 ·

  • Add examples
    Open
    documentation

    Difficulty 2/5 1-3 hours Newbie friendliness 45/100

    Tehforsch/diman#61 ·

  • Add integer storage types
    Open
    enhancement unit-safety

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#59 ·

  • Improve doctest situation
    Open
    code-quality documentation

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#58 · 2 comments ·

  • `round` should not exist on floats
    Open
    enhancement unit-safety

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#57 ·

  • Better error messages for rational dimensions
    Open
    enhancement error-message

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#51 ·

  • Debug printing convenience macro
    Open
    enhancement ergonomics

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    Tehforsch/diman#47 ·

  • Allow loading preludes or extending previous `unit_system` calls
    Open
    ergonomics macro-syntax

    Difficulty 5/5 Over a week Newbie friendliness 30/100

    Tehforsch/diman#43 ·

  • Allow specifying which units are preferred for debug printing
    Open
    enhancement ergonomics macro-syntax

    Difficulty 5/5 Over a week Newbie friendliness 15/100

    Tehforsch/diman#41 ·

  • Heterogeneously dimensioned linear algebra
    Open
    enhancement unit-safety

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#39 · 1 comment ·

  • Distinguish absolute and relative quantities
    Open
    enhancement unit-safety

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    Tehforsch/diman#38 · 1 comment ·

  • Orientational analysis / non-dimensionless angles
    Open
    enhancement unit-safety

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    Tehforsch/diman#37 · 1 comment ·

  • Dynamic system of units
    Open
    unit-safety

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#35 · 4 comments ·

  • Make unit constructors `const`
    Open
    enhancement ergonomics

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#26 ·

  • Exported modules in macro code have visibility `pub`, should be private
    Open
    code-quality enhancement

    Difficulty 2/5 1-3 hours Newbie friendliness 38/100

    Tehforsch/diman#19 ·

  • Make dependencies dev_dependencies unless `si` activated
    Open
    code-quality

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    Tehforsch/diman#15 ·

  • Add a feature to derive `Ord` on float types
    Open
    enhancement ergonomics

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    Tehforsch/diman#1 ·

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