feat: add support for meta plugin options and outputs

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/meta_plugin/system.rs

@@ -25,6 +25,7 @@ pub struct BinaryMetaPlugin {
     is_saved: bool,
     item_id: Option<i64>,
     conn: Option<*mut Connection>,
+    output_name: Option<String>,
 }
 
 impl BinaryMetaPlugin {
@@ -36,6 +37,7 @@ impl BinaryMetaPlugin {
             is_saved: false,
             item_id: None,
             conn: None,
+            output_name: None,
         }
     }
     
@@ -69,7 +71,7 @@ impl MetaPlugin for BinaryMetaPlugin {
                     // Save to database immediately
                     let meta = crate::db::Meta {
                         id: item_id,
-                        name: self.meta_name.clone(),
+                        name: self.get_output_name(&self.meta_name),
                         value,
                     };
                     let _ = crate::db::store_meta(conn_ref, meta);
@@ -91,6 +93,18 @@ impl MetaPlugin for BinaryMetaPlugin {
         Ok(())
     }
     
+    fn configure(&mut self, options: &std::collections::HashMap<String, serde_yaml::Value>) -> Result<()> {
+        if let Some(max_buffer_size) = options.get("max_buffer_size") {
+            if let Ok(size) = max_buffer_size.as_u64() {
+                self.max_buffer_size = size as usize;
+            }
+        }
+        Ok(())
+    }
+    
+    fn get_output_name(&self, default_name: &str) -> String {
+        self.output_name.clone().unwrap_or_else(|| default_name.to_string())
+    }
 }
 
 impl CwdMetaPlugin {