diff --git a/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/advanced/BenchmarkTests.java b/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/advanced/BenchmarkTests.java
index 642b709f2a..d1dbbb43fc 100644
--- a/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/advanced/BenchmarkTests.java
+++ b/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/advanced/BenchmarkTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2023, Oracle and/or its affiliates.
+ * Copyright (c) 2017, 2026, Oracle and/or its affiliates.
  * Copyright (c) 2014, Regents of the University of California
  *
  * All rights reserved.
@@ -43,6 +43,12 @@ public void richards3() {
         assertBenchNoError(name, new String[]{name, "20"});
     }
 
+    @Test
+    public void gr68715_collectOuterStackLocals() {
+        String name = "gr68715_collect_outer_stack_locals.py";
+        assertBenchNoError(name, new String[]{name, "1000", "4", "4"});
+    }
+
     @Test
     public void bm_ai() {
         String name = "ai-nqueen.py";
diff --git a/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/scripts/gr68715_collect_outer_stack_locals.py b/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/scripts/gr68715_collect_outer_stack_locals.py
new file mode 100644
index 0000000000..19cb9836c6
--- /dev/null
+++ b/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/scripts/gr68715_collect_outer_stack_locals.py
@@ -0,0 +1,199 @@
+#!/usr/bin/env python3
+# Copyright (c) 2026, 2026, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# The Universal Permissive License (UPL), Version 1.0
+#
+# Subject to the condition set forth below, permission is hereby granted to any
+# person obtaining a copy of this software, associated documentation and/or
+# data (collectively the "Software"), free of charge and under any and all
+# copyright rights in the Software, and any and all patent rights owned or
+# freely licensable by each licensor hereunder covering either (i) the
+# unmodified Software as contributed to or provided by such licensor, or (ii)
+# the Larger Works (as defined below), to deal in both
+#
+# (a) the Software, and
+#
+# (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+# one is included with the Software each a "Larger Work" to which the Software
+# is contributed by such licensors),
+#
+# without restriction, including without limitation the rights to copy, create
+# derivative works of, display, perform, and distribute the Software and make,
+# use, sell, offer for sale, import, export, have made, and have sold the
+# Software and the Larger Work(s), and to sublicense the foregoing rights on
+# either these or other terms.
+#
+# This license is subject to the following condition:
+#
+# The above copyright notice and either this complete permission notice or at a
+# minimum a reference to the UPL must be included in all copies or substantial
+# portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import inspect
+import sys
+import types
+from functools import wraps
+
+
+def make_fast_depends_utils_module():
+    # Model the frame-walking dependency-injection helper shape found in the wild.
+    module = types.ModuleType("autogen.fast_depends.utils")
+    filename = "autogen/fast_depends/utils.py"
+    module.__file__ = filename
+    code = r'''
+import inspect
+
+
+def collect_outer_stack_locals():
+    frame = inspect.currentframe()
+    current_filename = __file__
+    locals_ = {}
+    while frame:
+        frame_filename = frame.f_code.co_filename
+        if frame_filename != current_filename:
+            locals_.update(frame.f_locals)
+        frame = frame.f_back
+    return locals_
+'''
+    exec(compile(code, filename, "exec"), module.__dict__)
+    return module
+
+
+fast_depends_utils = make_fast_depends_utils_module()
+collect_outer_stack_locals = fast_depends_utils.collect_outer_stack_locals
+
+
+class Depends:
+    def __init__(self, dependency):
+        self.dependency = dependency
+
+
+def get_typed_signature(call):
+    outer_locals = collect_outer_stack_locals()
+    signature = inspect.signature(call)
+    resolved = []
+    for name, parameter in signature.parameters.items():
+        annotation = parameter.annotation
+        if isinstance(annotation, str):
+            try:
+                annotation = eval(annotation, call.__globals__, outer_locals)
+            except NameError:
+                annotation = object
+        resolved.append((name, annotation, parameter.default))
+    return resolved
+
+
+def build_call_model(call, depth):
+    typed_signature = get_typed_signature(call)
+    if depth <= 0:
+        return typed_signature
+    for _, _, default in typed_signature:
+        if isinstance(default, Depends):
+            build_call_model(default.dependency, depth - 1)
+    return typed_signature
+
+
+def inject(call=None, *, depth=3):
+    def decorate(func):
+        @wraps(func)
+        def func_wrapper(*args, **kwargs):
+            build_call_model(func, depth)
+            return func(*args, **kwargs)
+
+        return func_wrapper
+
+    if call is None:
+        return decorate
+    return decorate(call)
+
+
+def make_dependency_chain(index, depth):
+    class LocalPayload:
+        __slots__ = ("value",)
+
+        def __init__(self, value):
+            self.value = value
+
+    def leaf(item: "LocalPayload" = None):
+        return item.value if item else index
+
+    dependency = leaf
+    for layer in range(depth):
+        previous = dependency
+
+        def dependency(item: "LocalPayload" = None, dep=Depends(previous), layer=layer):
+            if item is None:
+                item = LocalPayload(index + layer)
+            return dep.dependency(item)
+
+    return dependency
+
+
+def generator_adapter(value):
+    yield value
+    yield value + 1
+
+
+def make_tool(index, depth):
+    dependency = make_dependency_chain(index, depth)
+
+    @inject(depth=depth)
+    def tool(payload: "LocalPayload" = None, dep=Depends(dependency)):
+        return sum(value for value in generator_adapter(dep.dependency(payload)))
+
+    class LocalPayload:
+        __slots__ = ("value",)
+
+        def __init__(self, value):
+            self.value = value
+
+    return tool
+
+
+def register_for_execution(functions):
+    registry = {}
+
+    def decorator(func):
+        build_call_model(func, 2)
+        registry[func.__name__] = func
+        functions.append(func)
+        return func
+
+    return decorator, registry
+
+
+def create_agent(function_count, depth):
+    functions = []
+    decorator, registry = register_for_execution(functions)
+    for index in range(function_count):
+        decorator(make_tool(index, depth))
+    return registry, functions
+
+
+def invoke_workflow(functions, iterations):
+    total = 0
+    for _ in range(iterations):
+        for func in functions:
+            total += func()
+    return total
+
+
+def main():
+    iterations = int(sys.argv[1]) if len(sys.argv) > 1 else 1000
+    function_count = int(sys.argv[2]) if len(sys.argv) > 2 else 4
+    depth = int(sys.argv[3]) if len(sys.argv) > 3 else 4
+    _, functions = create_agent(function_count, depth)
+    print("done result=%d" % invoke_workflow(functions, iterations))
+
+
+if __name__ == "__main__":
+    main()