diff --git a/crates/ptrs/examples/README.md b/crates/ptrs/examples/README.md
new file mode 100644
index 0000000..d6c4995
--- /dev/null
+++ b/crates/ptrs/examples/README.md
@@ -0,0 +1,16 @@
+
+# Minimal Example Transports.
+
+
+**Passthrough** - Does nothing but forward traffic.
+
+
+**Split** - (TODO) There's no protocol obfuscation, no
+encryption, but the link between the client and server uses *two* TCP
+connections, both of which are unidirectional: one is used only for
+upstream and the other is used only for downstream. The server listens
+on two ports, and when the client connects, it connects to both ports.
+
+
+**UDP** - (TODO) Demonstrate that the ptrs model works for transports wrapping
+unreliable channels (if they are designed to be).
diff --git a/crates/ptrs/src/passthrough.rs b/crates/ptrs/examples/passthrough/lib.rs
similarity index 98%
rename from crates/ptrs/src/passthrough.rs
rename to crates/ptrs/examples/passthrough/lib.rs
index 003b0e1..97ead65 100644
--- a/crates/ptrs/src/passthrough.rs
+++ b/crates/ptrs/examples/passthrough/lib.rs
@@ -1,4 +1,13 @@
-use super::*;
+use ptrs::{
+    args, ClientBuilder, ClientTransport, FutureResult as F, PluggableTransport, ServerBuilder,
+    ServerTransport,
+};
+
+use tokio::io::{AsyncRead, AsyncWrite};
+use tokio::time::Duration;
+
+use std::net::{SocketAddrV4, SocketAddrV6};
+use std::pin::Pin;
 
 pub struct Passthrough {}
 
@@ -166,7 +175,7 @@ impl Passthrough {
 #[cfg(test)]
 mod design_tests {
 
-    use crate::info;
+    use ptrs::info;
     use tokio::{
         io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt},
         net::TcpStream,
@@ -180,7 +189,7 @@ mod design_tests {
     use std::time::Duration;
 
     use super::{BuilderC, BuilderS, Passthrough};
-    use crate::{
+    use ptrs::{
         ClientBuilder,
         ClientTransport,
         FutureResult,
@@ -827,3 +836,4 @@ mod design_tests {
         Ok(())
     }
 }
+
diff --git a/crates/ptrs/examples/split.rs b/crates/ptrs/examples/split.rs
new file mode 100644
index 0000000..26fd1b0
--- /dev/null
+++ b/crates/ptrs/examples/split.rs
@@ -0,0 +1,3 @@
+fn main() {
+    todo!("example under construction");
+}
diff --git a/crates/ptrs/examples/udp.rs b/crates/ptrs/examples/udp.rs
new file mode 100644
index 0000000..26fd1b0
--- /dev/null
+++ b/crates/ptrs/examples/udp.rs
@@ -0,0 +1,3 @@
+fn main() {
+    todo!("example under construction");
+}
diff --git a/crates/ptrs/src/lib.rs b/crates/ptrs/src/lib.rs
index e80cee8..7d55ca8 100644
--- a/crates/ptrs/src/lib.rs
+++ b/crates/ptrs/src/lib.rs
@@ -237,6 +237,3 @@ pub(crate) type F<T, E> = FutureResult<T, E>;
 pub type TcpStreamFut = Pin<FutureResult<tokio::net::TcpStream, std::io::Error>>;
 
 pub type UdpSocketFut = Pin<FutureResult<tokio::net::UdpSocket, std::io::Error>>;
-
-#[cfg(test)]
-mod passthrough;