commit ad4ad6112c9a22e499fe3e8bc9caea9513402aab
Author: James Harton <james@harton.nz>
Date:   Fri Oct 13 18:46:21 2023 +1300

    chore: empty OTP app.

diff --git a/.formatter.exs b/.formatter.exs
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+++ b/.formatter.exs
@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]
diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+switch-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
diff --git a/README.md b/README.md
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+++ b/README.md
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+# Switch
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `switch` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:switch, "~> 0.1.0"}
+  ]
+end
+```
+
+Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
+and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
+be found at <https://hexdocs.pm/switch>.
+
diff --git a/lib/switch.ex b/lib/switch.ex
new file mode 100644
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+++ b/lib/switch.ex
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+defmodule Switch do
+  @moduledoc """
+  Documentation for `Switch`.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> Switch.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+end
diff --git a/mix.exs b/mix.exs
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+++ b/mix.exs
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+defmodule Switch.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :switch,
+      version: "0.1.0",
+      elixir: "~> 1.15",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
+    ]
+  end
+end
diff --git a/test/switch_test.exs b/test/switch_test.exs
new file mode 100644
index 0000000..3543ad3
--- /dev/null
+++ b/test/switch_test.exs
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+defmodule SwitchTest do
+  use ExUnit.Case
+  doctest Switch
+
+  test "greets the world" do
+    assert Switch.hello() == :world
+  end
+end
diff --git a/test/test_helper.exs b/test/test_helper.exs
new file mode 100644
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--- /dev/null
+++ b/test/test_helper.exs
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+ExUnit.start()