diff --git a/README.md b/README.md
new file mode 100644
index 0000000..dfb0616
--- /dev/null
+++ b/README.md
@@ -0,0 +1,15 @@
+# ARF
+
+The ARF programming language.
+
+This is still under development and does not compile things yet. Once complete,
+it will serve as a temporary compiler that will be used to write a new one using
+the language itself.
+
+## Checklist
+
+- [X] File reader
+- [ ] File -> tokens
+- [ ] Tokens -> syntax tree
+- [ ] Syntax tree -> semantic tree
+- [ ] Semantic tree -> C -> object file
diff --git a/lexer/lexer.go b/lexer/lexer.go
index b8eec36..ecc1250 100644
--- a/lexer/lexer.go
+++ b/lexer/lexer.go
@@ -5,6 +5,7 @@ import "github.com/sashakoshka/arf/file"
 // LexingOperation holds information about an ongoing lexing operataion.
 type LexingOperation struct {
 	file *file.File
+	char rune
 }
 
 // Tokenize converts a file into a slice of tokens (lexemes)