diff --git a/scripts/function_puller.py b/scripts/function_puller.py
index 418eb05b1..787c2ff06 100644
--- a/scripts/function_puller.py
+++ b/scripts/function_puller.py
@@ -2,26 +2,16 @@ import sys
 from typing import List
 
 
-def get_spec(file_name: str, phase:int = 0) -> List[str]:
+def get_spec(file_name: str) -> List[str]:
     code_lines = []
     pulling_from = None
     current_name = None
     current_typedef = None
-    is_update_section = False
-    update_section_depth = None
     type_defs = []
     for linenum, line in enumerate(open(file_name).readlines()):
         line = line.rstrip()
         if pulling_from is None and len(line) > 0 and line[0] == '#' and line[-1] == '`':
             current_name = line[line[:-1].rfind('`') + 1: -1]
-        if pulling_from is None and len(line) > 0 and line[0] == '#' and line.endswith('updates'):
-            is_update_section = True
-            update_section_depth = max(i for i in range(10) if line.startswith('#' * i))
-        elif pulling_from is None and len(line) > 0 and line[0] == '#' and is_update_section:
-            section_depth = max(i for i in range(10) if line.startswith('#' * i))
-            if section_depth <= update_section_depth:
-                is_update_section = False
-                update_section_depth = None
         if line[:9] == '```python':
             assert pulling_from is None
             pulling_from = linenum + 1
@@ -38,12 +28,8 @@ def get_spec(file_name: str, phase:int = 0) -> List[str]:
                 current_typedef = None
         else:
             if pulling_from == linenum and line == '{':
-                if is_update_section:
-                    code_lines.append('%s = SSZTypeExtension("%s", {' % (current_name, current_name))
-                    current_typedef = ['global_vars["%s"] = SSZTypeExtension("%s", {' % (current_name, current_name)]
-                else:
-                    code_lines.append('%s = SSZType("%s", {' % (current_name, current_name))
-                    current_typedef = ['global_vars["%s"] = SSZType("%s", {' % (current_name, current_name)]
+                code_lines.append('%s = SSZType({' % current_name)
+                current_typedef = ['global_vars["%s"] = SSZType({' % current_name]
             elif pulling_from is not None:
                 # Add some whitespace between functions
                 if line[:3] == 'def':
diff --git a/scripts/phase0/function_puller.py b/scripts/phase0/function_puller.py
new file mode 100644
index 000000000..750f19590
--- /dev/null
+++ b/scripts/phase0/function_puller.py
@@ -0,0 +1,75 @@
+import sys
+from typing import List
+
+
+def get_spec(file_name: str) -> List[str]:
+    code_lines = []
+    pulling_from = None
+    current_name = None
+    current_typedef = None
+    type_defs = []
+    for linenum, line in enumerate(open(sys.argv[1]).readlines()):
+        line = line.rstrip()
+        if pulling_from is None and len(line) > 0 and line[0] == '#' and line[-1] == '`':
+            current_name = line[line[:-1].rfind('`') + 1: -1]
+        if line[:9] == '```python':
+            assert pulling_from is None
+            pulling_from = linenum + 1
+        elif line[:3] == '```':
+            if pulling_from is None:
+                pulling_from = linenum
+            else:
+                if current_typedef is not None:
+                    assert code_lines[-1] == '}'
+                    code_lines[-1] = '})'
+                    current_typedef[-1] = '})'
+                    type_defs.append((current_name, current_typedef))
+                pulling_from = None
+                current_typedef = None
+        else:
+            if pulling_from == linenum and line == '{':
+                code_lines.append('%s = SSZType({' % current_name)
+                current_typedef = ['global_vars["%s"] = SSZType({' % current_name]
+            elif pulling_from is not None:
+                # Add some whitespace between functions
+                if line[:3] == 'def':
+                    code_lines.append('')
+                    code_lines.append('')
+                code_lines.append(line)
+                # Remember type def lines
+                if current_typedef is not None:
+                    current_typedef.append(line)
+            elif pulling_from is None and len(line) > 0 and line[0] == '|':
+                row = line[1:].split('|')
+                if len(row) >= 2:
+                    for i in range(2):
+                        row[i] = row[i].strip().strip('`')
+                        if '`' in row[i]:
+                            row[i] = row[i][:row[i].find('`')]
+                    eligible = True
+                    if row[0][0] not in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_':
+                        eligible = False
+                    for c in row[0]:
+                        if c not in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_0123456789':
+                            eligible = False
+                    if eligible:
+                        code_lines.append(row[0] + ' = ' + (row[1].replace('**TBD**', '0x1234567890123456789012345678901234567890')))
+    # Build type-def re-initialization
+    code_lines.append('\n')
+    code_lines.append('def init_SSZ_types():')
+    code_lines.append('    global_vars = globals()')
+    for ssz_type_name, ssz_type in type_defs:
+        code_lines.append('')
+        for type_line in ssz_type:
+            if len(type_line) > 0:
+                code_lines.append('    ' + type_line)
+    code_lines.append('\n')
+    code_lines.append('ssz_types = [\n')
+    for (ssz_type_name, _) in type_defs:
+        code_lines.append(f'    {ssz_type_name},\n')
+    code_lines.append(']')
+    code_lines.append('\n')
+    code_lines.append('def get_ssz_type_by_name(name: str) -> SSZType:')
+    code_lines.append('    return globals()[name]')
+    code_lines.append('')
+    return code_lines