diff --git a/nim/.devcontainer/devcontainer.json b/nim/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..6661940
--- /dev/null
+++ b/nim/.devcontainer/devcontainer.json
@@ -0,0 +1,14 @@
+{
+    "name": "UmbraTypes",
+    "image": "nimlang/nim",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "NimLang.nimlang", //Nim lang extension
+                "vadimcn.vscode-lldb", //for Nim debug
+                "streetsidesoftware.code-spell-checker" //spell checker
+            ]
+        }
+    },
+    "postCreateCommand": "./.devcontainer/post_create.sh"
+}
\ No newline at end of file
diff --git a/nim/.devcontainer/post_create.sh b/nim/.devcontainer/post_create.sh
new file mode 100755
index 0000000..06c8937
--- /dev/null
+++ b/nim/.devcontainer/post_create.sh
@@ -0,0 +1 @@
+nimble install nimlangserver
\ No newline at end of file
diff --git a/nim/.gitignore b/nim/.gitignore
new file mode 100644
index 0000000..2ca3f1f
--- /dev/null
+++ b/nim/.gitignore
@@ -0,0 +1,2 @@
+nimble.develop
+nimble.paths
diff --git a/nim/chat_types.nimble b/nim/chat_types.nimble
new file mode 100644
index 0000000..6f93a8d
--- /dev/null
+++ b/nim/chat_types.nimble
@@ -0,0 +1,13 @@
+# Package
+
+version       = "0.1.0"
+author        = "jazzz"
+description   = "Type definitions for the chat protocol"
+license       = "MIT"
+srcDir        = "src"
+bin    = @["dev"]   # Remove
+
+# Dependencies
+requires "nim >= 2.0.14"
+requires "chronicles"
+requires "protobuf_serialization"
diff --git a/nim/config.nims b/nim/config.nims
new file mode 100644
index 0000000..8ee48d2
--- /dev/null
+++ b/nim/config.nims
@@ -0,0 +1,4 @@
+# begin Nimble config (version 2)
+when withDir(thisDir(), system.fileExists("nimble.paths")):
+  include "nimble.paths"
+# end Nimble config
diff --git a/nim/src/chat_types.nim b/nim/src/chat_types.nim
new file mode 100644
index 0000000..51cb1ad
--- /dev/null
+++ b/nim/src/chat_types.nim
@@ -0,0 +1,9 @@
+import protobuf_serialization
+import protobuf_serialization/proto_parser
+
+import_proto3 "../../proto/umbra/base.proto"
+
+export protobuf_serialization
+
+# TODO: Do the Objects have to be listed manually?
+export HistoryEntry
\ No newline at end of file
diff --git a/nim/tests/config.nims b/nim/tests/config.nims
new file mode 100644
index 0000000..3bb69f8
--- /dev/null
+++ b/nim/tests/config.nims
@@ -0,0 +1 @@
+switch("path", "$projectDir/../src")
\ No newline at end of file
diff --git a/nim/tests/test_encoding.nim b/nim/tests/test_encoding.nim
new file mode 100644
index 0000000..22e2b82
--- /dev/null
+++ b/nim/tests/test_encoding.nim
@@ -0,0 +1,16 @@
+import unittest
+
+import chat_types
+
+suite "Type Encoding Tests":
+  test "HistoryEntry roundtrip": 
+    let x = chat_types.HistoryEntry(message_id: "12345", retrieval_hint: @[1'u8, 2, 3, 255])
+    let encoded = Protobuf.encode(x)
+    let decoded = Protobuf.decode(encoded, HistoryEntry)
+
+    check x.message_id == decoded.message_id
+    check x.retrieval_hint == decoded.retrieval_hint
+    check x == decoded
+
+  test "Multiplication works":
+    check(2 * 3 == 6)
\ No newline at end of file