diff --git a/slhx-core/src/lib.rs b/slhx-core/src/lib.rs
index a16a06f..48fddc5 100644
--- a/slhx-core/src/lib.rs
+++ b/slhx-core/src/lib.rs
@@ -713,7 +713,10 @@ impl<T> Slot<T> {
         self.id
     }
 
-    pub fn render(self, value: impl ToString) -> Effect {
+    pub fn render(self, value: T) -> Effect
+    where
+        T: ToString,
+    {
         self.text(value)
     }
 
@@ -761,7 +764,10 @@ where
         self.id
     }
 
-    pub fn append(self, key: K, value: impl ToString) -> Effect {
+    pub fn append(self, key: K, value: T) -> Effect
+    where
+        T: ToString,
+    {
         Effect::Insert {
             target: ResourceRef::unscoped(self.id),
             key: key.to_string(),
@@ -769,7 +775,10 @@ where
         }
     }
 
-    pub fn prepend(self, key: K, value: impl ToString) -> Effect {
+    pub fn prepend(self, key: K, value: T) -> Effect
+    where
+        T: ToString,
+    {
         Effect::Prepend {
             target: ResourceRef::unscoped(self.id),
             key: key.to_string(),
@@ -777,7 +786,10 @@ where
         }
     }
 
-    pub fn replace(self, key: K, value: impl ToString) -> Effect {
+    pub fn replace(self, key: K, value: T) -> Effect
+    where
+        T: ToString,
+    {
         let key = key.to_string();
         Effect::Put {
             target: ResourceRef {
diff --git a/slhx-core/tests/effect_batch.rs b/slhx-core/tests/effect_batch.rs
index 14e3765..b437b37 100644
--- a/slhx-core/tests/effect_batch.rs
+++ b/slhx-core/tests/effect_batch.rs
@@ -11,9 +11,9 @@ fn effect_batch_wire_round_trips() {
     let user = Atom::<String>::new(3);
 
     let batch = (
-        count.text(2),
-        todos.append(7, "Buy milk"),
-        todos.replace(7, "Buy oat milk"),
+        count.render(2),
+        todos.append(7, String::from("Buy milk")),
+        todos.replace(7, String::from("Buy oat milk")),
         user.set("Ada"),
         navigate("/todos"),
         event("toast", "Saved"),
@@ -31,7 +31,8 @@ fn effect_batch_wire_round_trips() {
 #[test]
 fn keyed_slot_replace_uses_scoped_resource_ref() {
     let todos = KeyedSlot::<u64, String>::new(9);
-    let effect = todos.replace(12, "done");
+    // req: codegen/002
+    let effect = todos.replace(12, String::from("done"));
 
     let Effect::Put { target, payload } = effect else {
         panic!("expected Put");
diff --git a/slhx-test/tests/inspector.rs b/slhx-test/tests/inspector.rs
index 968142c..64ffc75 100644
--- a/slhx-test/tests/inspector.rs
+++ b/slhx-test/tests/inspector.rs
@@ -21,7 +21,7 @@ fn inspects_tuple_effects() {
 #[test]
 fn finds_keyed_slot_targets() {
     let rows = KeyedSlot::<u32, String>::new(9);
-    let inspected = slhx_test::inspect(rows.append(7, "row"));
+    let inspected = slhx_test::inspect(rows.append(7, String::from("row")));
 
     assert!(inspected.has_keyed_slot(rows));
     assert_eq!(inspected.ops().len(), 1);