diff --git a/Formula/darkmatter.rb b/Formula/darkmatter.rb
deleted file mode 100644
index 6962899..0000000
--- a/Formula/darkmatter.rb
+++ /dev/null
@@ -1,28 +0,0 @@
-# frozen_string_literal: true
-
-class Darkmatter < Formula
-  desc "Command-line app for the Darkmatter/Marmot stack"
-  homepage "https://github.com/marmot-protocol/darkmatter"
-  url "ssh://git@github.com/marmot-protocol/darkmatter.git",
-      tag:      "v0.1.0",
-      revision: "f097e50cf1e7b4c0828423c270ea4280be06bc33"
-  license "MIT"
-
-  head "ssh://git@github.com/marmot-protocol/darkmatter.git", branch: "master"
-
-  depends_on "rust" => :build
-
-  def install
-    cli_path = File.directory?("crates/cli") ? "crates/cli" : "crates/dm"
-    system "cargo", "install", *std_cargo_args(path: cli_path), "--bins"
-  end
-
-  test do
-    assert_match "Darkmatter CLI", shell_output("#{bin}/dm --help 2>&1")
-    assert_match "Darkmatter daemon", shell_output("#{bin}/dmd --help 2>&1")
-
-    home = testpath/"home"
-    output = shell_output("#{bin}/dm --home #{home} --secret-store file account create")
-    assert_match "created account", output
-  end
-end
diff --git a/Formula/wn.rb b/Formula/wn.rb
new file mode 100644
index 0000000..c50fdaa
--- /dev/null
+++ b/Formula/wn.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+# White Noise CLI (`wn` and `wnd`) built from the marmot-protocol/mdk workspace.
+class Wn < Formula
+  desc "Command-line app for the White Noise/Marmot stack"
+  homepage "https://github.com/marmot-protocol/mdk"
+  url "https://github.com/marmot-protocol/mdk/archive/refs/tags/v0.9.1.tar.gz"
+  sha256 "ac7fdf1ba4fbbe9125ca3191a414f51bec12d715d463305efe3419b6e13f3616"
+  license "MIT"
+
+  head "https://github.com/marmot-protocol/mdk.git", branch: "master"
+
+  depends_on "rust" => :build
+
+  def install
+    system "cargo", "install", *std_cargo_args(path: "crates/cli"), "--bins"
+  end
+
+  test do
+    assert_match "White Noise account, group, message, stream, and daemon CLI",
+                 shell_output("#{bin}/wn --help 2>&1")
+    assert_match "White Noise background runtime daemon",
+                 shell_output("#{bin}/wnd --help 2>&1")
+
+    # `account create` publishes to a relay, so it cannot run in a sandboxed
+    # test; `settings show` exercises the data dir and config paths offline.
+    home = testpath/"home"
+    output = shell_output("#{bin}/wn --home #{home} --secret-store file settings show")
+    assert_match "theme=system", output
+  end
+end
diff --git a/README.md b/README.md
index 9d10191..fcb488d 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,10 @@
 
 `brew install marmot-protocol/tap/<formula>`
 
+For example, the White Noise CLI (`wn` and `wnd`):
+
+`brew install marmot-protocol/tap/wn`
+
 Or `brew tap marmot-protocol/tap` and then `brew install <formula>`.
 
 Or, in a `brew bundle` `Brewfile`:
diff --git a/formula_renames.json b/formula_renames.json
new file mode 100644
index 0000000..bf1fb03
--- /dev/null
+++ b/formula_renames.json
@@ -0,0 +1,3 @@
+{
+  "darkmatter": "wn"
+}