new: Add unstable setting.

crates/pdk-api/src/api/mod.rs

@@ -1,6 +1,6 @@
 mod build_source;
 
-use crate::shapes::StringOrVec;
+use crate::shapes::*;
 use rustc_hash::FxHashMap;
 use std::path::PathBuf;
 use version_spec::{CalVer, SemVer, SpecError, UnresolvedVersionSpec, VersionSpec};
@@ -109,6 +109,9 @@ api_struct!(
         /// Type of the tool.
         #[serde(rename = "type")]
         pub type_of: PluginType,
+
+        /// Whether this plugin is unstable or not.
+        pub unstable: Switch,
     }
 );
 

crates/pdk-api/src/shapes.rs

@@ -17,3 +17,27 @@ impl StringOrVec {
         }
     }
 }
+
+api_enum!(
+    /// Either a boolean representing on or off, or a string representing on with a message.
+    #[serde(untagged)]
+    pub enum Switch {
+        Toggle(bool),
+        Message(String),
+    }
+);
+
+impl Default for Switch {
+    fn default() -> Self {
+        Self::Toggle(false)
+    }
+}
+
+impl Switch {
+    pub fn is_enabled(&self) -> bool {
+        match self {
+            Self::Toggle(value) => *value,
+            Self::Message(_) => true,
+        }
+    }
+}