diff --git a/api/bank/v1/account.proto b/api/bank/v1/account.proto
index f6ede0e..21b4854 100644
--- a/api/bank/v1/account.proto
+++ b/api/bank/v1/account.proto
@@ -11,7 +11,7 @@ import "bank/v1/errors.proto";
 // State machine definition.
 
 message Account {
-  option (.rbt.v1alpha1.state) = {
+  option (rbt.v1alpha1.state) = {
   };
   string customer_name = 1;
   uint64 balance = 2;
diff --git a/api/bank/v1/bank.proto b/api/bank/v1/bank.proto
index 5b3cc80..18aa615 100644
--- a/api/bank/v1/bank.proto
+++ b/api/bank/v1/bank.proto
@@ -25,7 +25,7 @@ service BankInterface {
 ////////////////////////////////////////////////////////////////////////
 
 message Bank {
-  option (.rbt.v1alpha1.state) = {
+  option (rbt.v1alpha1.state) = {
   };
   repeated string account_ids = 1;
 }
diff --git a/api/hello_constructors/v1/hello.proto b/api/hello_constructors/v1/hello.proto
index d5cf15a..d500e38 100644
--- a/api/hello_constructors/v1/hello.proto
+++ b/api/hello_constructors/v1/hello.proto
@@ -28,7 +28,7 @@ service HelloInterface {
 }
 
 message Hello {
-  option (.rbt.v1alpha1.state) = {
+  option (rbt.v1alpha1.state) = {
   };
   repeated string messages = 2;
 }
diff --git a/api/hello_legacy_grpc/v1/greeter.proto b/api/hello_legacy_grpc/v1/greeter.proto
index b718612..306a9ad 100644
--- a/api/hello_legacy_grpc/v1/greeter.proto
+++ b/api/hello_legacy_grpc/v1/greeter.proto
@@ -41,7 +41,7 @@ service ProxyGreeter {
 }
 
 message RebootGreeter {
-  option (.rbt.v1alpha1.state) = {
+  option (rbt.v1alpha1.state) = {
   };
   int32 num_greetings = 1;
 }
diff --git a/api/hello_tasks/v1/hello.proto b/api/hello_tasks/v1/hello.proto
index e7763c7..3bf50bb 100644
--- a/api/hello_tasks/v1/hello.proto
+++ b/api/hello_tasks/v1/hello.proto
@@ -42,7 +42,7 @@ message Message {
 }
 
 message Hello {
-  option (.rbt.v1alpha1.state) = {
+  option (rbt.v1alpha1.state) = {
   };
   repeated Message messages = 1;
   int32 num_erased_messages = 2;
diff --git a/bank/.rbtrc b/bank/.rbtrc
index c2da1f2..b0f639e 100644
--- a/bank/.rbtrc
+++ b/bank/.rbtrc
@@ -35,4 +35,4 @@ dev run --watch=backend/**/*.py
 dev run --python
 
 # Run the application!
-dev run backend/src/main.py
+dev run --application=backend/src/main.py
diff --git a/hello-constructors/.rbtrc b/hello-constructors/.rbtrc
index c2da1f2..b0f639e 100644
--- a/hello-constructors/.rbtrc
+++ b/hello-constructors/.rbtrc
@@ -35,4 +35,4 @@ dev run --watch=backend/**/*.py
 dev run --python
 
 # Run the application!
-dev run backend/src/main.py
+dev run --application=backend/src/main.py
diff --git a/hello-legacy-grpc/.rbtrc b/hello-legacy-grpc/.rbtrc
index c2da1f2..b0f639e 100644
--- a/hello-legacy-grpc/.rbtrc
+++ b/hello-legacy-grpc/.rbtrc
@@ -35,4 +35,4 @@ dev run --watch=backend/**/*.py
 dev run --python
 
 # Run the application!
-dev run backend/src/main.py
+dev run --application=backend/src/main.py
diff --git a/hello-legacy-grpc/backend/src/main.py b/hello-legacy-grpc/backend/src/main.py
index fb26381..7f8b1e7 100755
--- a/hello-legacy-grpc/backend/src/main.py
+++ b/hello-legacy-grpc/backend/src/main.py
@@ -1,4 +1,5 @@
 import asyncio
+import reboot.aio.memoize
 from deprecated_greeter_servicer import DeprecatedGreeterServicer
 from hello_legacy_grpc.v1.greeter_rbt import RebootGreeter
 from proxy_greeter_servicer import ProxyGreeterServicer
@@ -24,7 +25,7 @@ async def initialize(context: ExternalContext):
 
 async def main():
     await Application(
-        servicers=[RebootGreeterServicer],
+        servicers=[RebootGreeterServicer] + reboot.aio.memoize.servicers(),
         legacy_grpc_servicers=[
             DeprecatedGreeterServicer, ProxyGreeterServicer
         ],
diff --git a/hello-legacy-grpc/backend/src/reboot_greeter_servicer.py b/hello-legacy-grpc/backend/src/reboot_greeter_servicer.py
index 4b324a7..73759ca 100644
--- a/hello-legacy-grpc/backend/src/reboot_greeter_servicer.py
+++ b/hello-legacy-grpc/backend/src/reboot_greeter_servicer.py
@@ -13,6 +13,7 @@
     WorkflowContext,
     WriterContext,
 )
+from reboot.aio.memoize import at_most_once
 
 logging.basicConfig(level=logging.INFO)
 
@@ -78,22 +79,21 @@ async def Initialize(
         context: WorkflowContext,
         request: Empty,
     ):
-        # Call the ProxyGreeter service for a few greetings.
-        #
-        # NOTE: we don't currently have a way to call legacy gRPC
-        # _idempotently_ (that's one of the reasons for Reboot!), so
-        # for now we assume/hope that this workflow won't get retried
-        # due to a failure but it's totally possible and if it happens
-        # we might perform extra greets!
-        async with context.legacy_grpc_channel() as channel:
-            proxy_greeter_stub = greeter_pb2_grpc.ProxyGreeterStub(channel)
 
-            for i in range(10):
-                greet_response = await proxy_greeter_stub.Greet(
-                    greeter_pb2.GreetRequest(name="legacy gRPC")
-                )
-                logging.info(
-                    f"Received a greeting: '{greet_response.message}'"
-                )
+        async def make_greetings():
+            """Calls the ProxyGreeter service for a few greetings."""
+            async with context.legacy_grpc_channel() as channel:
+                proxy_greeter_stub = greeter_pb2_grpc.ProxyGreeterStub(channel)
+
+                for i in range(10):
+                    greet_response = await proxy_greeter_stub.Greet(
+                        greeter_pb2.GreetRequest(name="legacy gRPC")
+                    )
+                    logging.info(
+                        f"Received a greeting: '{greet_response.message}'"
+                    )
+
+        # We only want to make the greetings at-most-once.
+        await at_most_once("make greetings", context, make_greetings)
 
         return Empty()
diff --git a/hello-tasks/.rbtrc b/hello-tasks/.rbtrc
index 66a0551..375251a 100644
--- a/hello-tasks/.rbtrc
+++ b/hello-tasks/.rbtrc
@@ -35,4 +35,4 @@ dev run --watch=backend/**/*.py
 dev run --python
 
 # Run the application!
-dev run backend/src/main.py
+dev run --application=backend/src/main.py
diff --git a/pyproject.toml b/pyproject.toml
index fddcc19..85cd0d7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 requires-python = ">= 3.10"
 dependencies = [
-    "reboot==0.15.0",
+    "reboot==0.16.0",
 ]
 
 [tool.rye]
@@ -9,7 +9,7 @@ dev-dependencies = [
     "mypy==1.2.0",
     "pytest>=7.4.2",
     "types-protobuf>=4.24.0.20240129",
-    "reboot==0.15.0",
+    "reboot==0.16.0",
 ]
 
 # This project only uses `rye` to provide `python` and its dependencies, so
diff --git a/requirements-dev.lock b/requirements-dev.lock
index a54b5b4..505929c 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -108,7 +108,7 @@ python-dateutil==2.9.0.post0
 pyyaml==6.0.2
     # via kubernetes-asyncio
     # via reboot
-reboot==0.15.0
+reboot==0.16.0
 setuptools==75.1.0
     # via grpcio-tools
 six==1.16.0
diff --git a/requirements.lock b/requirements.lock
index 4d56548..0a3f214 100644
--- a/requirements.lock
+++ b/requirements.lock
@@ -97,7 +97,7 @@ python-dateutil==2.9.0.post0
 pyyaml==6.0.2
     # via kubernetes-asyncio
     # via reboot
-reboot==0.15.0
+reboot==0.16.0
 setuptools==75.1.0
     # via grpcio-tools
 six==1.16.0