refactor: reduce boilerplate by using default implementations and base struct

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/meta_plugin.rs

@@ -29,6 +29,37 @@ pub struct MetaPluginResponse {
     pub is_finalized: bool,
 }
 
+/// Base implementation for meta plugins to reduce boilerplate
+#[derive(Debug, Clone, Default)]
+pub struct BaseMetaPlugin {
+    pub outputs: std::collections::HashMap<String, serde_yaml::Value>,
+    pub options: std::collections::HashMap<String, serde_yaml::Value>,
+}
+
+impl BaseMetaPlugin {
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
+impl MetaPlugin for BaseMetaPlugin {
+    fn outputs(&self) -> &std::collections::HashMap<String, serde_yaml::Value> {
+        &self.outputs
+    }
+    
+    fn outputs_mut(&mut self) -> &mut std::collections::HashMap<String, serde_yaml::Value> {
+        &mut self.outputs
+    }
+    
+    fn options(&self) -> &std::collections::HashMap<String, serde_yaml::Value> {
+        &self.options
+    }
+    
+    fn options_mut(&mut self) -> &mut std::collections::HashMap<String, serde_yaml::Value> {
+        &mut self.options
+    }
+}
+
 #[derive(Debug, Eq, PartialEq, Clone, strum::EnumIter, strum::Display, strum::EnumString)]
 #[strum(ascii_case_insensitive)]
 pub enum MetaPluginType {
@@ -93,7 +124,7 @@ pub trait MetaPlugin {
     }
     
     // Update the meta plugin with new data
-    fn update(&mut self, data: &[u8]) -> MetaPluginResponse {
+    fn update(&mut self, _data: &[u8]) -> MetaPluginResponse {
         // Default implementation does nothing
         MetaPluginResponse {
             metadata: Vec::new(),
@@ -125,13 +156,23 @@ pub trait MetaPlugin {
         }
     }
     
-    // Access to outputs mapping
-    fn outputs(&self) -> &std::collections::HashMap<String, serde_yaml::Value>;
-    fn outputs_mut(&mut self) -> &mut std::collections::HashMap<String, serde_yaml::Value>;
+    // Access to outputs mapping with default implementation
+    fn outputs(&self) -> &std::collections::HashMap<String, serde_yaml::Value> {
+        &std::collections::HashMap::new()
+    }
     
-    // Access to options mapping
-    fn options(&self) -> &std::collections::HashMap<String, serde_yaml::Value>;
-    fn options_mut(&mut self) -> &mut std::collections::HashMap<String, serde_yaml::Value>;
+    fn outputs_mut(&mut self) -> &mut std::collections::HashMap<String, serde_yaml::Value> {
+        panic!("outputs_mut() not implemented for this plugin")
+    }
+    
+    // Access to options mapping with default implementation
+    fn options(&self) -> &std::collections::HashMap<String, serde_yaml::Value> {
+        &std::collections::HashMap::new()
+    }
+    
+    fn options_mut(&mut self) -> &mut std::collections::HashMap<String, serde_yaml::Value> {
+        panic!("options_mut() not implemented for this plugin")
+    }
     
     // Get the default output names this plugin can produce
     fn default_outputs(&self) -> Vec<String> {