3 files changed, 27 insertions, 0 deletions
diff --git a/crates/shirabe/src/console/input/input_argument.rs b/crates/shirabe/src/console/input/input_argument.rs
index 81f38ac..53576dd 100644
--- a/crates/shirabe/src/console/input/input_argument.rs
+++ b/crates/shirabe/src/console/input/input_argument.rs
@@ -29,4 +29,10 @@ impl InputArgument {
         )?;
         Ok(Self { inner })
     }
+
+    /// Unwraps to the underlying Symfony `InputArgument` (used when forwarding a Composer-typed
+    /// definition to the Symfony command state).
+    pub(crate) fn to_base(&self) -> BaseInputArgument {
+        self.inner.clone()
+    }
 }
diff --git a/crates/shirabe/src/console/input/input_option.rs b/crates/shirabe/src/console/input/input_option.rs
index 3298be0..c7b2af5 100644
--- a/crates/shirabe/src/console/input/input_option.rs
+++ b/crates/shirabe/src/console/input/input_option.rs
@@ -30,4 +30,10 @@ impl InputOption {
             BaseInputOption::new(name, shortcut, mode, description.to_string(), default_mixed)?;
         Ok(Self { inner })
     }
+
+    /// Unwraps to the underlying Symfony `InputOption` (used when forwarding a Composer-typed
+    /// definition to the Symfony command state).
+    pub(crate) fn to_base(&self) -> BaseInputOption {
+        self.inner.clone()
+    }
 }
diff --git a/crates/shirabe/src/console/input/mod.rs b/crates/shirabe/src/console/input/mod.rs
index 093d2f4..9141f0c 100644
--- a/crates/shirabe/src/console/input/mod.rs
+++ b/crates/shirabe/src/console/input/mod.rs
@@ -9,6 +9,21 @@ pub enum InputDefinitionItem {
     Option(input_option::InputOption),
 }
 
+impl InputDefinitionItem {
+    /// Converts to the Symfony-typed definition item accepted by `CommandData::set_definition`.
+    pub(crate) fn to_definition_item(
+        &self,
+    ) -> shirabe_external_packages::symfony::console::input::input_definition::DefinitionItem {
+        use shirabe_external_packages::symfony::console::input::input_definition::DefinitionItem;
+        match self {
+            InputDefinitionItem::Argument(argument) => {
+                DefinitionItem::InputArgument(argument.to_base())
+            }
+            InputDefinitionItem::Option(option) => DefinitionItem::InputOption(option.to_base()),
+        }
+    }
+}
+
 impl From<input_argument::InputArgument> for InputDefinitionItem {
     fn from(value: input_argument::InputArgument) -> Self {
         Self::Argument(value)