diff --git a/gitnexus/src/core/group/extractors/graphql-extractor.ts b/gitnexus/src/core/group/extractors/graphql-extractor.ts
index 4684533df..fcc4b8479 100644
--- a/gitnexus/src/core/group/extractors/graphql-extractor.ts
+++ b/gitnexus/src/core/group/extractors/graphql-extractor.ts
@@ -141,6 +141,14 @@ function substitutionIdentifier(substitution: Parser.SyntaxNode): string | null
   return expr.type === 'identifier' ? expr.text : null;
 }
 
+function isGraphqlTagCall(call: Parser.SyntaxNode): boolean {
+  const callee = call.childForFieldName('function');
+  if (!callee) return false;
+  if (callee.type === 'identifier') return callee.text === 'gql';
+  if (callee.type !== 'member_expression') return false;
+  return callee.childForFieldName('property')?.text === 'gql';
+}
+
 function uniqueStaticSource(
   name: string,
   declarators: GeneratedSymbolIndex,
@@ -340,7 +348,14 @@ function staticGraphqlSource(
 
   if (value.type === 'call_expression') {
     const template = value.namedChildren.find((child) => child.type === 'template_string');
-    return template ? staticGraphqlSource(template, declarators, resolving) : null;
+    if (!template) return null;
+    const hasSubstitution = template.namedChildren.some(
+      (child) => child.type === 'template_substitution',
+    );
+    // Interpolated reconstruction is the cooked template. Only `gql` is
+    // treated as preserving that source; String.raw / unknown tags stay fail-closed.
+    if (hasSubstitution && !isGraphqlTagCall(value)) return null;
+    return staticGraphqlSource(template, declarators, resolving);
   }
 
   if (value.type !== 'new_expression') return null;
diff --git a/gitnexus/test/unit/group/graphql-extractor.test.ts b/gitnexus/test/unit/group/graphql-extractor.test.ts
index 56363d6e8..4ce42376f 100644
--- a/gitnexus/test/unit/group/graphql-extractor.test.ts
+++ b/gitnexus/test/unit/group/graphql-extractor.test.ts
@@ -733,4 +733,26 @@ export const QDocument = gql\`query Q { q }\\n\${QFragmentDoc}\`;
       }),
     ]);
   });
+
+  it('fails closed for interpolated templates under a non-gql tag (#3201)', async () => {
+    const { root, repo } = await makeRepo({
+      'src/q.graphql': `query Q { q }`,
+      'src/generated.ts': `
+export const QFragmentDoc = /*#__PURE__*/ \`
+    fragment extra on Query { q }
+    \`;
+export const QDocument = String.raw\`query Q { q }\\n\${QFragmentDoc}\`;
+`,
+    });
+
+    const contracts = await new GraphqlExtractor().extract(
+      executor({
+        QDocument: [{ uid: 'const:q', name: 'QDocument', filePath: 'src/generated.ts' }],
+      }),
+      root,
+      repo,
+    );
+
+    expect(contracts).toEqual([]);
+  });
 });