### New features

* [#11475](https://github.com/rubocop/rubocop/pull/11475): Add autocorrect for hash in `Lint/LiteralInInterpolation`. ([@KessaPassa][])
* [#11584](https://github.com/rubocop/rubocop/pull/11584): Add `Metrics/CollectionLiteralLength` cop. ([@sambostock][])

### Bug fixes

* [#11615](https://github.com/rubocop/rubocop/issues/11615): Fix a false negative for `Lint/MissingSuper` when no `super` call with `Class.new` block. ([@koic][])
* [#11615](https://github.com/rubocop/rubocop/issues/11615): Fix a false negative for `Lint/MissingSuper` when using `Class.new` without parent class argument. ([@koic][])
* [#11040](https://github.com/rubocop/rubocop/issues/11040): Fix a false positive for `Style/IfUnlessModifier` when `defined?`'s argument value is undefined. ([@koic][])
* [#11607](https://github.com/rubocop/rubocop/issues/11607): Fix a false positive for `Style/RedundantRegexpEscape` when an escaped hyphen follows after an escaped opening square bracket within a character class. ([@SparLaimor][])
* [#11626](https://github.com/rubocop/rubocop/issues/11626): Fix a false positive for `Style/ZeroLengthPredicate` when using `File.new(path).size.zero?`. ([@koic][])
* [#11620](https://github.com/rubocop/rubocop/pull/11620): Fix an error for `Lint/ConstantResolution` when using `__ENCODING__`. ([@koic][])
* [#11625](https://github.com/rubocop/rubocop/pull/11625): Fix an error for `Lint/EmptyConditionalBody` when missing `if` body and using method call for return value. ([@koic][])
* [#11631](https://github.com/rubocop/rubocop/issues/11631): Fix an incorrect autocorrect for `Style/ArgumentsForwarding` when using arguments forwarding for `.()` call. ([@koic][])
* [#11621](https://github.com/rubocop/rubocop/issues/11621): Fix an incorrect autocorrect for `Layout/ClassStructure` using heredoc inside method. ([@fatkodima][])
* [#3591](https://github.com/rubocop/rubocop/issues/3591): Handle modifier `while` and `until` expressions in `Lint/UselessAssignment`. ([@bfad][])
* [#11202](https://github.com/rubocop/rubocop/issues/11202): Fixed usage of `--only` flag with `--auto-gen-config`. ([@istvanfazakas][])

### Changes

* [#11623](https://github.com/rubocop/rubocop/pull/11623): Add rubocop-capybara to suggested extensions and extension doc. ([@ydah][])

[@KessaPassa]: https://github.com/KessaPassa
[@sambostock]: https://github.com/sambostock
[@koic]: https://github.com/koic
[@SparLaimor]: https://github.com/SparLaimor
[@fatkodima]: https://github.com/fatkodima
[@bfad]: https://github.com/bfad
[@istvanfazakas]: https://github.com/istvanfazakas
[@ydah]: https://github.com/ydah
