diff --git a/solutions/c/01-at4/explanation.md b/solutions/c/01-at4/explanation.md
deleted file mode 100644
index 535312b..0000000
--- a/solutions/c/01-at4/explanation.md
+++ /dev/null
@@ -1,56 +0,0 @@
-The entry point for your HTTP server implementation is in `src/main.c`.
-
-Study and uncomment the relevant code: 
-
-```c
-// Uncomment this block to pass the first stage
-
-int server_fd, client_addr_len;
-struct sockaddr_in client_addr;
-
-server_fd = socket(AF_INET, SOCK_STREAM, 0);
-if (server_fd == -1) {
-	printf("Socket creation failed: %s...\n", strerror(errno));
-	return 1;
-}
-
-// Since the tester restarts your program quite often, setting SO_REUSEADDR
-// ensures that we don't run into 'Address already in use' errors
-int reuse = 1;
-if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
-	printf("SO_REUSEADDR failed: %s \n", strerror(errno));
-	return 1;
-}
-
-struct sockaddr_in serv_addr = { .sin_family = AF_INET ,
-								 .sin_port = htons(4221),
-								 .sin_addr = { htonl(INADDR_ANY) },
-								};
-
-if (bind(server_fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) != 0) {
-	printf("Bind failed: %s \n", strerror(errno));
-	return 1;
-}
-
-int connection_backlog = 5;
-if (listen(server_fd, connection_backlog) != 0) {
-	printf("Listen failed: %s \n", strerror(errno));
-	return 1;
-}
-
-printf("Waiting for a client to connect...\n");
-client_addr_len = sizeof(client_addr);
-
-accept(server_fd, (struct sockaddr *) &client_addr, &client_addr_len);
-printf("Client connected\n");
-
-close(server_fd);
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/clojure/01-at4/explanation.md b/solutions/clojure/01-at4/explanation.md
deleted file mode 100644
index 08be28b..0000000
--- a/solutions/clojure/01-at4/explanation.md
+++ /dev/null
@@ -1,16 +0,0 @@
-The entry point for your HTTP server implementation is in `src/http_server/core.clj`.
-
-Study and uncomment the relevant code: 
-
-```clojure
-;; Uncomment this block to pass the first stage
-(serve)
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/cpp/01-at4/explanation.md b/solutions/cpp/01-at4/explanation.md
deleted file mode 100644
index b61d01c..0000000
--- a/solutions/cpp/01-at4/explanation.md
+++ /dev/null
@@ -1,55 +0,0 @@
-The entry point for your HTTP server implementation is in `src/main.cpp`.
-
-Study and uncomment the relevant code: 
-
-```cpp
-// Uncomment this block to pass the first stage
-
-int server_fd = socket(AF_INET, SOCK_STREAM, 0);
-if (server_fd < 0) {
- std::cerr << "Failed to create server socket\n";
- return 1;
-}
-
-// Since the tester restarts your program quite often, setting SO_REUSEADDR
-// ensures that we don't run into 'Address already in use' errors
-int reuse = 1;
-if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
-  std::cerr << "setsockopt failed\n";
-  return 1;
-}
-
-struct sockaddr_in server_addr;
-server_addr.sin_family = AF_INET;
-server_addr.sin_addr.s_addr = INADDR_ANY;
-server_addr.sin_port = htons(4221);
-
-if (bind(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr)) != 0) {
-  std::cerr << "Failed to bind to port 4221\n";
-  return 1;
-}
-
-int connection_backlog = 5;
-if (listen(server_fd, connection_backlog) != 0) {
-  std::cerr << "listen failed\n";
-  return 1;
-}
-
-struct sockaddr_in client_addr;
-int client_addr_len = sizeof(client_addr);
-
-std::cout << "Waiting for a client to connect...\n";
-
-accept(server_fd, (struct sockaddr *) &client_addr, (socklen_t *) &client_addr_len);
-std::cout << "Client connected\n";
-
-close(server_fd);
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/csharp/01-at4/explanation.md b/solutions/csharp/01-at4/explanation.md
deleted file mode 100644
index 33d8be7..0000000
--- a/solutions/csharp/01-at4/explanation.md
+++ /dev/null
@@ -1,18 +0,0 @@
-The entry point for your HTTP server implementation is in `src/Server.cs`.
-
-Study and uncomment the relevant code: 
-
-```csharp
-// Uncomment this block to pass the first stage
-TcpListener server = new TcpListener(IPAddress.Any, 4221);
-server.Start();
-server.AcceptSocket(); // wait for client
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/dart/01-at4/explanation.md b/solutions/dart/01-at4/explanation.md
deleted file mode 100644
index 594b43d..0000000
--- a/solutions/dart/01-at4/explanation.md
+++ /dev/null
@@ -1,21 +0,0 @@
-The entry point for your HTTP server implementation is in `bin/main.dart`.
-
-Study and uncomment the relevant code: 
-
-```dart
-// Uncomment this to pass the first stage
-
-var serverSocket = await ServerSocket.bind('0.0.0.0', 4221);
-
-await for (var clientSocket in serverSocket) {
-  print("Client connected");
-}
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/elixir/01-at4/explanation.md b/solutions/elixir/01-at4/explanation.md
deleted file mode 100644
index 6925f78..0000000
--- a/solutions/elixir/01-at4/explanation.md
+++ /dev/null
@@ -1,20 +0,0 @@
-The entry point for your HTTP server implementation is in `lib/main.ex`.
-
-Study and uncomment the relevant code: 
-
-```elixir
-# Uncomment this block to pass the first stage
-
-# Since the tester restarts your program quite often, setting SO_REUSEADDR
-# ensures that we don't run into 'Address already in use' errors
-{:ok, socket} = :gen_tcp.listen(4221, [:binary, active: false, reuseaddr: true])
-{:ok, _client} = :gen_tcp.accept(socket)
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/gleam/01-at4/explanation.md b/solutions/gleam/01-at4/explanation.md
deleted file mode 100644
index 751a8bb..0000000
--- a/solutions/gleam/01-at4/explanation.md
+++ /dev/null
@@ -1,24 +0,0 @@
-The entry point for your HTTP server implementation is in `src/main.gleam`.
-
-Study and uncomment the relevant code: 
-
-```gleam
-// Uncomment this block to pass the first stage
-
-let assert Ok(_) =
-  glisten.handler(fn(_conn) { #(Nil, None) }, fn(_msg, state, _conn) {
-    io.println("Received message!")
-    actor.continue(state)
-  })
-  |> glisten.serve(4221)
-
-process.sleep_forever()
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/go/01-at4/explanation.md b/solutions/go/01-at4/explanation.md
deleted file mode 100644
index 1932da0..0000000
--- a/solutions/go/01-at4/explanation.md
+++ /dev/null
@@ -1,27 +0,0 @@
-The entry point for your HTTP server implementation is in `app/main.go`.
-
-Study and uncomment the relevant code: 
-
-```go
-// Uncomment this block to pass the first stage
-
-l, err := net.Listen("tcp", "0.0.0.0:4221")
-if err != nil {
-	fmt.Println("Failed to bind to port 4221")
-	os.Exit(1)
-}
-
-_, err = l.Accept()
-if err != nil {
-	fmt.Println("Error accepting connection: ", err.Error())
-	os.Exit(1)
-}
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/haskell/01-at4/explanation.md b/solutions/haskell/01-at4/explanation.md
deleted file mode 100644
index 5aeb29b..0000000
--- a/solutions/haskell/01-at4/explanation.md
+++ /dev/null
@@ -1,34 +0,0 @@
-The entry point for your HTTP server implementation is in `app/Main.hs`.
-
-Study and uncomment the relevant code: 
-
-```haskell
--- Uncomment this block to pass first stage
-let host = "127.0.0.1"
-    port = "4221"
-
-BC.putStrLn $ "Listening on " <> BC.pack host <> ":" <> BC.pack port
-
--- Get address information for the given host and port
-addrInfo <- getAddrInfo Nothing (Just host) (Just port)
-
-serverSocket <- socket (addrFamily $ head addrInfo) Stream defaultProtocol
-bind serverSocket $ addrAddress $ head addrInfo
-listen serverSocket 5
-
--- Accept connections and handle them forever
-forever $ do
-    (clientSocket, clientAddr) <- accept serverSocket
-    BC.putStrLn $ "Accepted connection from " <> BC.pack (show clientAddr) <> "."
-    -- Handle the clientSocket as needed...
-
-    close clientSocket
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/java/01-at4/explanation.md b/solutions/java/01-at4/explanation.md
deleted file mode 100644
index a8d0eba..0000000
--- a/solutions/java/01-at4/explanation.md
+++ /dev/null
@@ -1,28 +0,0 @@
-The entry point for your HTTP server implementation is in `src/main/java/Main.java`.
-
-Study and uncomment the relevant code: 
-
-```java
-// Uncomment this block to pass the first stage
-
-try {
-  ServerSocket serverSocket = new ServerSocket(4221);
-
-  // Since the tester restarts your program quite often, setting SO_REUSEADDR
-  // ensures that we don't run into 'Address already in use' errors
-  serverSocket.setReuseAddress(true);
-
-  serverSocket.accept(); // Wait for connection from client.
-  System.out.println("accepted new connection");
-} catch (IOException e) {
-  System.out.println("IOException: " + e.getMessage());
-}
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/javascript/01-at4/explanation.md b/solutions/javascript/01-at4/explanation.md
deleted file mode 100644
index 9de6f7c..0000000
--- a/solutions/javascript/01-at4/explanation.md
+++ /dev/null
@@ -1,22 +0,0 @@
-The entry point for your HTTP server implementation is in `app/main.js`.
-
-Study and uncomment the relevant code: 
-
-```javascript
-// Uncomment this to pass the first stage
-const server = net.createServer((socket) => {
-  socket.on("close", () => {
-    socket.end();
-  });
-});
-
-server.listen(4221, "localhost");
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/kotlin/01-at4/explanation.md b/solutions/kotlin/01-at4/explanation.md
deleted file mode 100644
index 433af3f..0000000
--- a/solutions/kotlin/01-at4/explanation.md
+++ /dev/null
@@ -1,23 +0,0 @@
-The entry point for your HTTP server implementation is in `app/src/main/kotlin/App.kt`.
-
-Study and uncomment the relevant code: 
-
-```kotlin
-// Uncomment this block to pass the first stage
-var serverSocket = ServerSocket(4221)
-
-// Since the tester restarts your program quite often, setting SO_REUSEADDR
-// ensures that we don't run into 'Address already in use' errors
-serverSocket.reuseAddress = true
-
-serverSocket.accept() // Wait for connection from client.
-println("accepted new connection")
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/python/01-at4/explanation.md b/solutions/python/01-at4/explanation.md
deleted file mode 100644
index e1bb2d9..0000000
--- a/solutions/python/01-at4/explanation.md
+++ /dev/null
@@ -1,18 +0,0 @@
-The entry point for your HTTP server implementation is in `app/main.py`.
-
-Study and uncomment the relevant code: 
-
-```python
-# Uncomment this to pass the first stage
-
-server_socket = socket.create_server(("localhost", 4221), reuse_port=True)
-server_socket.accept() # wait for client
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/ruby/01-at4/explanation.md b/solutions/ruby/01-at4/explanation.md
deleted file mode 100644
index 3cb549e..0000000
--- a/solutions/ruby/01-at4/explanation.md
+++ /dev/null
@@ -1,18 +0,0 @@
-The entry point for your HTTP server implementation is in `app/server.rb`.
-
-Study and uncomment the relevant code: 
-
-```ruby
-# Uncomment this to pass the first stage
-
-server = TCPServer.new("localhost", 4221)
-client_socket, client_address = server.accept
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/rust/01-at4/explanation.md b/solutions/rust/01-at4/explanation.md
deleted file mode 100644
index b56d9ef..0000000
--- a/solutions/rust/01-at4/explanation.md
+++ /dev/null
@@ -1,28 +0,0 @@
-The entry point for your HTTP server implementation is in `src/main.rs`.
-
-Study and uncomment the relevant code: 
-
-```rust
-// Uncomment this block to pass the first stage
-
-let listener = TcpListener::bind("127.0.0.1:4221").unwrap();
-
-for stream in listener.incoming() {
-    match stream {
-        Ok(_stream) => {
-            println!("accepted new connection");
-        }
-        Err(e) => {
-            println!("error: {}", e);
-        }
-    }
-}
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/typescript/01-at4/explanation.md b/solutions/typescript/01-at4/explanation.md
deleted file mode 100644
index 200d412..0000000
--- a/solutions/typescript/01-at4/explanation.md
+++ /dev/null
@@ -1,22 +0,0 @@
-The entry point for your HTTP server implementation is in `app/main.ts`.
-
-Study and uncomment the relevant code: 
-
-```typescript
-// Uncomment this to pass the first stage
-const server = net.createServer((socket) => {
-  socket.on("close", () => {
-    socket.end();
-  });
-});
-
-server.listen(4221, "localhost");
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```
diff --git a/solutions/zig/01-at4/explanation.md b/solutions/zig/01-at4/explanation.md
deleted file mode 100644
index 66477e4..0000000
--- a/solutions/zig/01-at4/explanation.md
+++ /dev/null
@@ -1,23 +0,0 @@
-The entry point for your HTTP server implementation is in `src/main.zig`.
-
-Study and uncomment the relevant code: 
-
-```zig
-// Uncomment this block to pass the first stage
-const address = try net.Address.resolveIp("127.0.0.1", 4221);
-var listener = try address.listen(.{
-    .reuse_address = true,
-});
-defer listener.deinit();
-
-_ = try listener.accept();
-std.debug.print("client connected!", .{});
-```
-
-Push your changes to pass the first stage:
-
-```
-git add .
-git commit -m "pass 1st stage" # any msg
-git push origin master
-```