starting phase 5; clap cli

src/types.rs

@@ -1,5 +1,6 @@
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
+use std::path::Path;
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct Config {
@@ -28,6 +29,20 @@ impl Default for Config {
     }
 }
 
+impl Config {
+    pub fn load(path: &Path) -> anyhow::Result<Self> {
+        if path.exists() {
+            let contents = std::fs::read_to_string(path)?;
+            let config: Config = serde_json::from_str(&contents)?;
+            tracing::info!("Loaded config from {}", path.display());
+            Ok(config)
+        } else {
+            tracing::warn!("Config file {} not found, using defaults", path.display());
+            Ok(Self::default())
+        }
+    }
+}
+
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct MetadataResponse {
     #[serde(default)]