v0.4.0

Added

• Added ExSlop recommended bundle — configure {ExSlop, :recommended} to enable the curated high-signal check set.
• Added ExSlop.recommended_checks/0 for tools that want the same curated check list programmatically.
• Added RedundantEnumJoinSeparator (EXS4016) — flags Enum.join(parts, ""); use Enum.join(parts) instead.
• Added UseMapJoin (EXS4017) — flags Enum.map/2 |> Enum.join/1; use Enum.map_join/3 instead. Opt-in only.
• Added PreferEnumSlice (EXS4018) — flags Enum.drop/2 |> Enum.take/2; use Enum.slice/3 instead. Opt-in only.
• Added GraphemesLength (EXS4019) — flags counting String.graphemes/1; use String.length/1 instead.
• Added ManualStringReverse (EXS4020) — flags String.graphemes/1 |> Enum.reverse/1 |> Enum.join/1; use String.reverse/1 instead.
• Added SortThenAt (EXS4021) — flags Enum.sort/1 |> Enum.at/2 when a single-pass selection is likely clearer.
• Added SortForTopK (EXS4022) — flags Enum.sort/1 |> Enum.take(1) and Enum.sort/1 |> hd/1; use min/max or single-pass selection instead.
• Added ListFold (EXS4023) — flags List.foldl/3 and List.foldr/3; use Enum.reduce/3 instead. Opt-in only.
• Added ListLast (EXS4024) — flags List.last/1 because it traverses the whole list. Opt-in only.
• Added LengthInGuard (EXS4025) — flags length/1 in guards; prefer pattern matching where possible. Opt-in only.
• Added ExplicitSumReduce (EXS4026) — flags manual summing with Enum.reduce/3; use Enum.sum/1 instead.

Changed

• The recommended bundle now excludes checks that proved noisy on mature Elixir codebases, while keeping them available for explicit opt-in.
• Updated documentation with the recommended bundle and full check list.