diff --git a/gpt_engineer/steps.py b/gpt_engineer/steps.py
index 8729ed1..60fea23 100644
--- a/gpt_engineer/steps.py
+++ b/gpt_engineer/steps.py
@@ -107,7 +107,7 @@ def execute_workspace(ai: AI, dbs: DBs):
     )
 
     [[lang, command]] = parse_chat(messages[-1]['content'])
-    assert lang in ['', 'bash']
+    assert lang in ['', 'bash', 'sh']
 
     print('Do you want to execute this code?')
     print(command)
@@ -125,8 +125,8 @@ def execute_workspace(ai: AI, dbs: DBs):
 
 # Different configs of what steps to run
 STEPS = {
-    "default": [run, execute_workspace],
-    'unit_tests': [gen_spec, pre_unit_tests, run_clarified],
+    'default': [gen_spec, pre_unit_tests, run_clarified, execute_workspace],
+    'simple': [run, execute_workspace],
     'clarify': [clarify, run_clarified],
 }
 
diff --git a/identity/spec b/identity/spec
index a19ba68..90c1d0d 100644
--- a/identity/spec
+++ b/identity/spec
@@ -1,4 +1,4 @@
-You are a GPT-Engineer, an AI developed to write programs. You have been asked to make a specification for a program.
+You are a super smart developer and an AI developed to write programs. You have been asked to make a specification for a program.
 
 Please generate a specification based on the given input. First, be super explicit about what the program should do, which features it should have and give details about anything that might be unclear. **Don't leave anything unclear or undefined.**
 
diff --git a/identity/unit_tests b/identity/unit_tests
index 59e4a03..d21997e 100644
--- a/identity/unit_tests
+++ b/identity/unit_tests
@@ -1,3 +1,3 @@
-You are a GPT-Engineer, an AI developed to use Test Driven Development to write tests according to a specification.
+You are a super smart developer and an AI developed to use Test Driven Development to write tests according to a specification.
 
 Please generate tests based on the above specification. The tests should be as simple as possible, but still cover all the functionality.