diff --git a/gitnexus/src/core/embeddings/ast-utils.ts b/gitnexus/src/core/embeddings/ast-utils.ts
index 0fa85d18f..f0478b452 100644
--- a/gitnexus/src/core/embeddings/ast-utils.ts
+++ b/gitnexus/src/core/embeddings/ast-utils.ts
@@ -43,11 +43,14 @@ export const ensureAndParse = async (content: string, filePath: string): Promise
   // concatenated code-cell Python (same as the parse worker).
   const provider = getProvider(language);
   if (isNotebookPath(filePath)) {
-    const extracted = extractNotebookPython(content);
-    if (!extracted) return null;
-    const parseContent =
-      provider.preprocessSource?.(extracted.pythonSource, filePath) ?? extracted.pythonSource;
-    return parseSourceSafe(parserInstance, parseContent);
+    const body = content.charCodeAt(0) === 0xfeff ? content.slice(1) : content;
+    if (body.trimStart().startsWith('{')) {
+      const extracted = extractNotebookPython(content);
+      if (!extracted) return null;
+      const parseContent =
+        provider.preprocessSource?.(extracted.pythonSource, filePath) ?? extracted.pythonSource;
+      return parseSourceSafe(parserInstance, parseContent);
+    }
   }
 
   const parseContent = provider.preprocessSource?.(content, filePath) ?? content;
diff --git a/gitnexus/src/core/ingestion/ipynb-extractor.ts b/gitnexus/src/core/ingestion/ipynb-extractor.ts
index d6a8f9478..b4e6dadda 100644
--- a/gitnexus/src/core/ingestion/ipynb-extractor.ts
+++ b/gitnexus/src/core/ingestion/ipynb-extractor.ts
@@ -647,7 +647,11 @@ export function extractNotebookPythonCached(
   content: string,
 ): NotebookPythonExtraction | null {
   const hit = extractCache.get(filePath);
-  if (hit && hit.content === content) return hit.result;
+  if (hit && hit.content === content) {
+    extractCache.delete(filePath);
+    extractCache.set(filePath, hit);
+    return hit.result;
+  }
   const result = extractNotebookPython(content);
   if (extractCache.size >= EXTRACT_CACHE_LIMIT && !extractCache.has(filePath)) {
     const oldest = extractCache.keys().next().value;
diff --git a/gitnexus/src/core/ingestion/languages/python/captures.ts b/gitnexus/src/core/ingestion/languages/python/captures.ts
index 717140305..b37850366 100644
--- a/gitnexus/src/core/ingestion/languages/python/captures.ts
+++ b/gitnexus/src/core/ingestion/languages/python/captures.ts
@@ -12,7 +12,7 @@
  *      binding, and `__init__` assignments from annotated parameters emit
  *      class-scoped instance-field bindings (see `receiver-binding.ts`).
  *
- * Pure given the input source text. No I/O, no globals consulted.
+ * No I/O. A `.ipynb` path also depends on `filePath` and `sourceMeta`, not only the source text.
  */
 
 import type { Capture, CaptureMatch, Range } from 'gitnexus-shared';
diff --git a/gitnexus/test/integration/resolvers/ipynb-python-pipeline.test.ts b/gitnexus/test/integration/resolvers/ipynb-python-pipeline.test.ts
index c0a6fd3d7..b03845dac 100644
--- a/gitnexus/test/integration/resolvers/ipynb-python-pipeline.test.ts
+++ b/gitnexus/test/integration/resolvers/ipynb-python-pipeline.test.ts
@@ -82,12 +82,7 @@ describe('Jupyter notebook Python pipeline', () => {
         ),
       ).toHaveLength(0);
       expect(
-        getNodesByLabelFull(result, 'File').filter((n) =>
-          n.properties.filePath.replace(/\\/g, '/').endsWith('julia.ipynb'),
-        ),
-      ).toHaveLength(0);
-      expect(
-        getNodesByLabelFull(result, 'File').filter((n) =>
+        getNodesByLabelFull(result, 'Function').filter((n) =>
           n.properties.filePath.replace(/\\/g, '/').endsWith('broken.ipynb'),
         ),
       ).toHaveLength(0);