feat: add --output-format option for json/yaml support in info/status/list modes

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

src/modes/common.rs

@@ -11,6 +11,7 @@ use std::collections::HashMap;
 use std::env;
 use std::str::FromStr;
 use strum::IntoEnumIterator;
+use serde::{Deserialize, Serialize};
 
 pub fn get_meta_from_env() -> HashMap<String, String> {
     debug!("COMMON: Getting meta from KEEP_META_*");
@@ -162,6 +163,33 @@ pub fn cmd_args_compression_type(cmd: &mut Command, args: &Args) -> CompressionT
     compression_type_opt.unwrap()
 }
 
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum OutputFormat {
+    Table,
+    Json,
+    Yaml,
+}
+
+impl FromStr for OutputFormat {
+    type Err = anyhow::Error;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s.to_lowercase().as_str() {
+            "table" => Ok(OutputFormat::Table),
+            "json" => Ok(OutputFormat::Json),
+            "yaml" => Ok(OutputFormat::Yaml),
+            _ => Err(anyhow::anyhow!("Invalid output format. Supported formats: table, json, yaml")),
+        }
+    }
+}
+
+pub fn get_output_format(args: &Args) -> OutputFormat {
+    args.options.output_format
+        .as_ref()
+        .and_then(|s| OutputFormat::from_str(s).ok())
+        .unwrap_or(OutputFormat::Table)
+}
+
 pub fn cmd_args_meta_plugin_types(cmd: &mut Command, args: &Args) -> Vec<MetaPluginType> {
     let mut meta_plugin_types = Vec::new();