diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..7ae5136
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,31 @@
+# Typed Hypertext Preprocessor
+
+The latest rewrite of the THP programming language.
+Now in Zig!
+
+## TODO
+
+- [ ] Rewrite lexer
+- [ ] Rewrite parser
+- [ ] Rewrite semantic analyzer
+- [ ] Rewrite type checker
+- [ ] Rewrite code generator
+- [ ] Rewrite CLI interface
+- [ ] Rewrite REPL
+- [ ] Rewrite tests
+- [ ] Type definition generator
+- [ ] Code formatter
+- [ ] Language server
+- [ ] stdlib
+- [ ] Watch mode compilation
+- [ ] Project mode compilation
+- [ ] Docs generator
+
+
+## v0.0.1
+
+- [ ] 
+
+
+
+
diff --git a/src/main.zig b/src/main.zig
index c8a3f67..6b004d0 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,19 +1,21 @@
 const std = @import("std");
+const thp_version: []const u8 = "0.0.0";
 
 pub fn main() !void {
+    try repl();
+
     // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)
     std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
+}
 
-    // stdout is for the actual output of your application, for example if you
-    // are implementing gzip, then only the compressed bytes should be sent to
-    // stdout, not any debugging messages.
+fn repl() !void {
     const stdout_file = std.io.getStdOut().writer();
     var bw = std.io.bufferedWriter(stdout_file);
     const stdout = bw.writer();
+    try stdout.print("The THP REPL, v{s}\n", .{thp_version});
+    try stdout.print("Enter expressions to evaluate. Enter CTRL-D to exit.\n", .{});
 
-    try stdout.print("Run `zig build test` to run the tests.\n", .{});
-
-    try bw.flush(); // don't forget to flush!
+    try bw.flush();
 }
 
 test "simple test" {