diff --git a/opto/trace/projections/__init__.py b/opto/trace/projections/__init__.py
index 7264d5bd..6b285dc0 100644
--- a/opto/trace/projections/__init__.py
+++ b/opto/trace/projections/__init__.py
@@ -1,2 +1,2 @@
 from opto.trace.projections.projections import Projection
-from opto.trace.projections.code_projections import BlackCodeFormatter, DocstringProjection
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+from opto.trace.projections.code_projections import BlackCodeFormatter, DocstringProjection, SuggestionNormalizationProjection
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diff --git a/opto/trace/projections/code_projections.py b/opto/trace/projections/code_projections.py
index 78a4642c..c7356a9d 100644
--- a/opto/trace/projections/code_projections.py
+++ b/opto/trace/projections/code_projections.py
@@ -1,5 +1,7 @@
 
 from opto.trace.projections import Projection
+import re
+import ast
 
 class BlackCodeFormatter(Projection):
     # This requires the `black` package to be installed.
@@ -28,4 +30,54 @@ def project(self, x: str) -> str:
                 x = f'{x[0]}"""{self.docstring}"""{x[2]}'
             else:
                 x = f'{x[0]}"""{self.docstring}"""'
-        return x
\ No newline at end of file
+        return x
+
+class SuggestionNormalizationProjection(Projection):
+    """
+    Normalize LLM-generated suggestion dicts:
+      - Literal-eval strings to their true types
+      - Alias frequent keys like "__code:8" ↔ "__code8"
+      - Black-reformat any code snippets
+    """
+    def __init__(self, parameters):
+        self.parameters = parameters
+
+    def project(self, suggestion: dict) -> dict:
+        from black import format_str, FileMode
+        def _find_key(node_name: str):
+            # exact match
+            if node_name in suggestion:
+                return node_name
+            # strip a colon before digits ("__code:8" → "__code8")
+            norm = re.sub(r":(?=\d+$)", "", node_name)
+            for k in suggestion:
+                if re.sub(r":(?=\d+$)", "", k) == norm:
+                    return k
+            return None
+
+        normalized: dict = {}
+        for node in self.parameters:
+            if not getattr(node, "trainable", False):
+                continue
+            key = _find_key(node.py_name)
+            if key is None:
+                continue
+
+            raw_val = suggestion[key]
+            # re-format any Python defs
+            # check that key start with "__code" and contains "def"
+            if isinstance(raw_val, str) and key.startswith("__code"):
+                raw_val = format_str(raw_val, mode=FileMode())
+
+            # convert "123" → 123, "[1,2]" → [1,2], etc.
+            target_type = type(node.data)
+            if isinstance(raw_val, str) and target_type is not str:
+                try:
+                    raw_val = target_type(ast.literal_eval(raw_val))
+                except Exception:
+                    pass
+
+            # map by the parameter’s name, not the node itself
+            normalized[node.py_name] = raw_val
+
+        return normalized
diff --git a/tests/unit_tests/test_projection.py b/tests/unit_tests/test_projection.py
index 794fffcd..84c9a1c4 100644
--- a/tests/unit_tests/test_projection.py
+++ b/tests/unit_tests/test_projection.py
@@ -1,4 +1,5 @@
-from opto.trace.projections import BlackCodeFormatter, DocstringProjection
+from opto.trace.projections import BlackCodeFormatter, DocstringProjection, SuggestionNormalizationProjection
+from types import SimpleNamespace
 
 def test_black_code_formatter():
     code = """
@@ -35,4 +36,53 @@ def example_function():
     assert formatted_code == new_code
 
     # assert '"""This is a new docstring."""' in formatted_code    
-    # assert 'print("Hello, World!")' in formatted_code
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+    # assert 'print("Hello, World!")' in formatted_code
+
+def test_suggestion_normalization_projection():
+    import re
+    import pytest
+    # Prepare a mock parameter list with various py_names, types, and trainable flags
+    params = [
+        # code param: key comes in as "__code:1", should alias to "__code1" and be black‑formatted
+        SimpleNamespace(py_name="__code1", trainable=True, data=""),
+        # learning rate param: as float, but suggestion comes as a literal string
+        SimpleNamespace(py_name="__lr", trainable=True, data=0.0),
+        # should be skipped because not trainable
+        SimpleNamespace(py_name="__frozen", trainable=False, data=123),
+        # some other param, no suggestion provided
+        SimpleNamespace(py_name="__missing", trainable=True, data=1)
+    ]
+
+    raw_suggestion = {
+        "__code:1": "def foo(x):return x*2",   # needs black formatting
+        "__lr": "\"0.01\"",                    # needs literal‐eval → float
+        "__frozen": "999",                     # should be ignored
+        "unrelated": "[1,2,3]",                # not in params
+    }
+
+    proj = SuggestionNormalizationProjection(params)
+    normalized = proj.project(raw_suggestion)
+
+    # It should only contain keys for trainable params that were suggested
+    assert set(normalized.keys()) == {"__code1", "__lr"}
+
+    # 1) __code1 should be black‐formatted: 'def foo' newline indent 'return x * 2'
+    code_out = normalized["__code1"]
+    # check that there's exactly one indent (4 spaces) before the return,
+    # and that black added a trailing newline
+    assert re.search(r"def foo\(x\):\n {4}return x \* 2\n$", code_out)
+
+    # 2) __lr should have been converted from the string "0.01" to float 0.01
+    assert isinstance(normalized["__lr"], float)
+    assert normalized["__lr"] == pytest.approx(0.01)
+
+    # 3) Non‐trainable or missing params should not appear
+    assert "__frozen" not in normalized
+    assert "__missing" not in normalized
+
+    # --- literal‑eval failure should be left unchanged ---
+    # If ast.literal_eval raises, the original string remains
+    params_bad = [SimpleNamespace(py_name="__bad", trainable=True, data=100)]
+    raw_suggestion_bad = {"__bad": "not_a_number"}
+    normalized_bad = SuggestionNormalizationProjection(params_bad).project(raw_suggestion_bad)
+    assert normalized_bad["__bad"] == "not_a_number"
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