swe-programming-elixirlisted

# Elixir Stack Coding Standards ## Purpose Progressive disclosure of Elixir stack coding standards for agents writing Elixir code. **Coverage**: Elixir language → Phoenix Framework → Phoenix LiveView (full technology stack) **Usage**: Auto-loaded for agents when writing any Elixir/Phoenix code. Provides quick reference to idioms, best practices, and antipatterns across the full stack. --- ## Elixir Language Standards **Authoritative Source**: [docs/explanation/software-engineering/programming-languages/elixir/README.md](../../../docs/explanation/software-engineering/programming-languages/elixir/README.md) ### Naming Conventions **Modules**: PascalCase - `UserAccount`, `PaymentProcessor` **Functions and Variables**: snake_case - Functions: `calculate_total/1`, `find_user_by_id/1` - Variables: `user_name`, `total_amount` **Atoms**: lowercase with underscores - `:ok`, `:error`, `:not_found` **Private Functions**: Prefix with `def` (not `defp` for documentation) - Use `@doc false` for private but need to document ### Modern Elixir Features (1.14+) **Pattern Matching**: Use extensively ```elixir case result do {:ok, value} -> process_value(value) {:error, reason} -> handle_error(reason) _ -> :unknown end ``` **Pipe Operator**: Chain transformations ```elixir data |> parse() |> validate() |> process() |> format() ``` **With Statement**: Handle multiple operations ```elixir with {:ok, user} <- find_user(id), {:ok, account} <- find_account(user.accou