diff --git a/StringCalculatorSpecs/calculator.txt b/StringCalculatorSpecs/calculator.txt
new file mode 100644
index 0000000..3027895
--- /dev/null
+++ b/StringCalculatorSpecs/calculator.txt
@@ -0,0 +1,23 @@
+string_calculator_add
+    when_passed_a_single_number
+      returns_0_for_empty_string
+	  returns_0_for_zero
+	  returns_1_for_one
+    when_passed_two_comma_delimited_numbers
+	  returns_their_sum
+	when_passed_multiple_comma_delimited_numbers
+	  returns_their_sum
+	when_delimited_with_newline_and_comma
+	  returns_their_sum
+	when_passed_a_delimiter
+	  returns_the_sum_based_on_that_delimiter
+	when_passed_negative_numbers
+	  throws_an_exception_listing_invalid_values
+	when_passed_numbers_over_1000
+	  ignores_them
+	when_passed_multicharacter_delimiter
+	  uses_that_delimiter_to_sum_values
+	when_passed_multiple_delimiters
+	  sums_on_each_delimiter
+	when_passed_multiple_multicharacter_delimiters
+	  sums_on_each_delimiter