diff --git a/cldk/analysis/python/backend.py b/cldk/analysis/python/backend.py
index c0c64ad..8911e5e 100644
--- a/cldk/analysis/python/backend.py
+++ b/cldk/analysis/python/backend.py
@@ -156,7 +156,8 @@ def get_callables_overview(self) -> List[PyCallableOverview]:
     @abstractmethod
     def get_method_bodies(self, signatures: List[str]) -> Dict[str, str]:
         """Source bodies for the given callable signatures, keyed by signature. Signatures with no
-        matching callable are omitted."""
+        matching callable are omitted, as are callables whose ``code`` is ``None`` (e.g. synthesized
+        callables the analyzer emits with no source text) — every returned value is a real ``str``."""
 
     @abstractmethod
     def get_decorated_callables(self, markers: List[str]) -> List[PyCallableOverview]:
diff --git a/cldk/analysis/python/codeanalyzer/codeanalyzer.py b/cldk/analysis/python/codeanalyzer/codeanalyzer.py
index 8ddaced..fead2f5 100644
--- a/cldk/analysis/python/codeanalyzer/codeanalyzer.py
+++ b/cldk/analysis/python/codeanalyzer/codeanalyzer.py
@@ -583,9 +583,10 @@ def get_callables_overview(self) -> List[PyCallableOverview]:
         return [_overview(c, class_sig, kind) for c, class_sig, kind in self._iter_callables()]
 
     def get_method_bodies(self, signatures: List[str]) -> Dict[str, str]:
-        """Return ``{signature: code}`` for the requested signatures that exist."""
+        """Return ``{signature: code}`` for the requested signatures that exist and have a body
+        (omits callables whose ``code`` is ``None``)."""
         wanted = set(signatures)
-        return {c.signature: c.code for c, _, _ in self._iter_callables() if c.signature in wanted}
+        return {c.signature: c.code for c, _, _ in self._iter_callables() if c.signature in wanted and c.code is not None}
 
     def get_decorated_callables(self, markers: List[str]) -> List[PyCallableOverview]:
         """Return overviews of callables decorated with any of ``markers``."""
diff --git a/cldk/analysis/python/neo4j/neo4j_backend.py b/cldk/analysis/python/neo4j/neo4j_backend.py
index e01e817..455ba36 100644
--- a/cldk/analysis/python/neo4j/neo4j_backend.py
+++ b/cldk/analysis/python/neo4j/neo4j_backend.py
@@ -498,12 +498,12 @@ def get_callables_overview(self) -> List[PyCallableOverview]:
 
     def get_method_bodies(self, signatures: List[str]) -> Dict[str, str]:
         rows = self._run(
-            "MATCH (c:PyCallable) WHERE c._module IN $mods AND c.signature IN $sigs "
+            "MATCH (c:PyCallable) WHERE c._module IN $mods AND c.signature IN $sigs AND c.code IS NOT NULL "
             "RETURN c.signature AS signature, c.code AS code",
             mods=self._modules,
             sigs=list(signatures),
         )
-        return {r["signature"]: r.get("code") for r in rows}
+        return {r["signature"]: r["code"] for r in rows}
 
     def get_decorated_callables(self, markers: List[str]) -> List[PyCallableOverview]:
         rows = self._run(
diff --git a/cldk/analysis/python/python_analysis.py b/cldk/analysis/python/python_analysis.py
index 3262309..233ad2a 100644
--- a/cldk/analysis/python/python_analysis.py
+++ b/cldk/analysis/python/python_analysis.py
@@ -552,7 +552,8 @@ def get_method_bodies(self, signatures: List[str]) -> Dict[str, str]:
 
         Returns:
             A dict mapping each signature to its source body. Signatures with no matching callable
-            are omitted.
+            are omitted, as are callables whose ``code`` is ``None`` — every returned value is a
+            real ``str``.
         """
         return self.backend.get_method_bodies(signatures)