v2.3.0

New smell checks

• Repeated traversal — same variable traversed by 2+ different Enum functions (e.g. Enum.max(list) + Enum.min(list)); suggests Enum.reduce/3.
• Nested enum — Enum.member?/2 nested inside Enum.map/filter/etc on the same variable (O(n²)); suggests MapSet.
• Multiple Enum.at — 3+ Enum.at/2 calls on the same variable with literal indices; suggests pattern matching.
• Append in recursion — ++ [item] in recursive tail calls (O(n²)); suggests prepend + reverse.
• Piped Regex.replace — text |> Regex.replace(~r/.../, "") where the pipe puts the string in the regex position; uses the new ExAST piped() predicate to avoid false positives on direct calls.

New pattern smells

• Map.keys/values → Enum.join/uniq/count/length/member?/sum/max/min
• List.foldr/3, Enum.min_by/max_by/dedup_by with identity fn
• Enum.filter |> Enum.filter, Enum.map |> List.flatten/Enum.flat_map
• Enum.sort/2 |> Enum.reverse, Enum.with_index |> Enum.reduce
• Enum.map_join(_, "", _) redundant separator
• Integer.to_string |> String.graphemes, length(String.split) - 1, Enum.at(list, -1)

Other

• Parser warning suppression via emit_warnings: false
• ex_ast bumped to ~> 0.11.1
• Corpus-tested against 200 top Hex packages: 0 crashes, 0 false positives