diff --git a/protocol/src/decoder.rs b/protocol/src/decoder.rs
index 503db3b..5b756c9 100644
--- a/protocol/src/decoder.rs
+++ b/protocol/src/decoder.rs
@@ -239,6 +239,24 @@ impl Decoder for Vec<String> {
     }
 }
 
+// TODO(timvisee): forge mod channel decoder, we might want a custom type
+impl Decoder for Vec<(String, String)> {
+    type Output = Self;
+
+    fn decode<R: Read>(reader: &mut R) -> Result<Self::Output, DecodeError> {
+        let length = reader.read_var_i32()? as usize;
+        let mut vec = Vec::with_capacity(length);
+
+        for _ in 0..length {
+            let a = reader.read_string(32767)?;
+            let b = reader.read_string(32767)?;
+            vec.push((a, b));
+        }
+
+        Ok(vec)
+    }
+}
+
 pub mod var_int {
     use crate::decoder::DecoderReadExt;
     use crate::error::DecodeError;
diff --git a/protocol/src/encoder.rs b/protocol/src/encoder.rs
index 8c43c45..a1e5a58 100644
--- a/protocol/src/encoder.rs
+++ b/protocol/src/encoder.rs
@@ -196,6 +196,20 @@ impl Encoder for Vec<String> {
     }
 }
 
+// TODO(timvisee): forge mod channel encoder, we might want a custom type
+impl Encoder for Vec<(String, String)> {
+    fn encode<W: Write>(&self, writer: &mut W) -> Result<(), EncodeError> {
+        writer.write_var_i32(self.len() as i32)?;
+
+        for (a, b) in self {
+            writer.write_string(&a, 32767)?;
+            writer.write_string(&b, 32767)?;
+        }
+
+        Ok(())
+    }
+}
+
 pub mod var_int {
     use crate::encoder::EncoderWriteExt;
     use crate::error::EncodeError;
diff --git a/protocol/src/version/forge_v1_13/login.rs b/protocol/src/version/forge_v1_13/login.rs
new file mode 100644
index 0000000..5715e36
--- /dev/null
+++ b/protocol/src/version/forge_v1_13/login.rs
@@ -0,0 +1,62 @@
+use crate::{set_packet_id, version::PacketId};
+use minecraft_protocol_derive::Decoder;
+use minecraft_protocol_derive::Encoder;
+
+set_packet_id!(ModList, 1);
+set_packet_id!(ModListReply, 2);
+set_packet_id!(ServerRegistry, 3);
+set_packet_id!(ConfigurationData, 4);
+set_packet_id!(Acknowledgement, 99);
+
+#[derive(Encoder, Decoder, Debug)]
+pub struct LoginWrapper {
+    pub channel: String,
+    pub packet: Vec<u8>,
+}
+
+#[derive(Encoder, Decoder, Debug)]
+pub struct ModList {
+    pub mod_names: Vec<String>,
+    pub channels: Vec<(String, String)>,
+    pub registries: Vec<String>,
+}
+
+impl ModList {
+    /// Transform this into a `ModListReply` with empty registry markers.
+    pub fn into_reply(self) -> ModListReply {
+        ModListReply {
+            mod_names: self.mod_names,
+            channels: self.channels,
+            registries: self
+                .registries
+                .into_iter()
+                .map(|r| (r, "".into()))
+                .collect(),
+        }
+    }
+}
+
+#[derive(Encoder, Decoder, Debug)]
+pub struct ModListReply {
+    pub mod_names: Vec<String>,
+    pub channels: Vec<(String, String)>,
+    pub registries: Vec<(String, String)>,
+}
+
+#[derive(Encoder, Decoder, Debug)]
+pub struct ServerRegistry {
+    pub registry_name: String,
+    pub snapshot_present: bool,
+    // TODO: implement this snapshot type!
+    // TODO: add dummy data here, 5x 0 ?
+    pub snapshot: Vec<u8>,
+}
+
+#[derive(Encoder, Decoder, Debug)]
+pub struct ConfigurationData {
+    pub file_name: String,
+    pub data: Vec<u8>,
+}
+
+#[derive(Encoder, Decoder, Debug)]
+pub struct Acknowledgement {}
diff --git a/protocol/src/version/forge_v1_13/mod.rs b/protocol/src/version/forge_v1_13/mod.rs
new file mode 100644
index 0000000..320cbbb
--- /dev/null
+++ b/protocol/src/version/forge_v1_13/mod.rs
@@ -0,0 +1 @@
+pub mod login;
diff --git a/protocol/src/version/mod.rs b/protocol/src/version/mod.rs
index cace214..939b6df 100644
--- a/protocol/src/version/mod.rs
+++ b/protocol/src/version/mod.rs
@@ -1,3 +1,4 @@
+pub mod forge_v1_13;
 pub mod v1_14_4;
 pub mod v1_16_5;
 pub mod v1_17;