v2.3.1

New smell patterns

• Case-on-boolean — case expr do true -> ...; false -> ... end when the subject is a boolean expression. Uses capture guards to avoid false positives on sentinel returns.
• Cond two-clause — cond do ... true -> ... end with exactly two clauses → if/else
• Unless/else → if with positive case first
• Redundant assignment — result = expr; result → just expr
• Manual max/min — if a > b, do: a, else: b → Kernel.max/2
• @doc false on defp — redundant, private functions can't have docs
• Sort then negative take — Enum.sort |> Enum.take(-n) → Enum.sort(:desc) |> Enum.take(n)

Fixed

• ++ in reduce false positives — now checks whether ++ actually references the accumulator variable. 17 fewer false positives across 200 Hex packages.
• Dogfooding — fixed all actionable smell findings in Reach's own code across 15 files
• CI — mix ci now runs reach.check --arch --smells