diff --git a/src/config/mod.rs b/src/config/mod.rs
new file mode 100644
index 0000000..8455033
--- /dev/null
+++ b/src/config/mod.rs
@@ -0,0 +1,181 @@
+use serde::{Deserialize, Serialize};
+use std::path::{Path, PathBuf};
+use crate::cli::SyncBackend;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Dotfile {
+    pub path: PathBuf,
+    pub content_hash: Option<String>,
+    pub permissions: Option<u32>,
+    pub platform: Option<String>,
+    pub template: Option<bool>,
+    #[serde(default)]
+    pub excludes: Vec<String>,
+}
+
+impl Default for Dotfile {
+    fn default() -> Self {
+        Self {
+            path: PathBuf::new(),
+            content_hash: None,
+            permissions: None,
+            platform: None,
+            template: Some(false),
+            excludes: Vec::new(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SyncConfig {
+    pub backend: Option<SyncBackend>,
+    pub remote: Option<String>,
+    pub branch: String,
+    pub path: PathBuf,
+    #[serde(default)]
+    pub excludes: Vec<String>,
+}
+
+impl Default for SyncConfig {
+    fn default() -> Self {
+        Self {
+            backend: Some(SyncBackend::Git),
+            remote: None,
+            branch: "main".to_string(),
+            path: PathBuf::from("dotfiles"),
+            excludes: Vec::new(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MergeConfig {
+    pub strategy: Option<String>,
+    pub keep_backup: bool,
+    pub auto_resolve: bool,
+}
+
+impl Default for MergeConfig {
+    fn default() -> Self {
+        Self {
+            strategy: Some("ask".to_string()),
+            keep_backup: true,
+            auto_resolve: false,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct DetectConfig {
+    pub patterns: Vec<String>,
+    pub exclude_patterns: Vec<String>,
+    pub include_hidden: bool,
+    pub scan_depth: usize,
+}
+
+impl Default for DetectConfig {
+    fn default() -> Self {
+        Self {
+            patterns: vec![
+                ".*".to_string(),
+                ".config/*".to_string(),
+                ".local/*".to_string(),
+            ],
+            exclude_patterns: vec![
+                ".git".to_string(),
+                ".gitignore".to_string(),
+                "node_modules".to_string(),
+                ".cache".to_string(),
+            ],
+            include_hidden: true,
+            scan_depth: 5,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BackupConfig {
+    pub directory: PathBuf,
+    pub max_backups: usize,
+    pub timestamp_format: String,
+}
+
+impl Default for BackupConfig {
+    fn default() -> Self {
+        Self {
+            directory: dirs::home_dir()
+                .map(|p| p.join(".dotmigrate/backups"))
+                .unwrap_or_else(|| PathBuf::from(".dotmigrate/backups")),
+            max_backups: 10,
+            timestamp_format: "%Y-%m-%d_%H-%M-%S".to_string(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Config {
+    pub version: String,
+    pub sync: SyncConfig,
+    pub merge: MergeConfig,
+    pub detect: DetectConfig,
+    pub backup: BackupConfig,
+    #[serde(default)]
+    pub dotfiles: Vec<Dotfile>,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            version: "1.0".to_string(),
+            sync: SyncConfig::default(),
+            merge: MergeConfig::default(),
+            detect: DetectConfig::default(),
+            backup: BackupConfig::default(),
+            dotfiles: Vec::new(),
+        }
+    }
+}
+
+impl Config {
+    pub fn default_for_backend(backend: SyncBackend) -> Self {
+        let mut config = Self::default();
+        config.sync.backend = Some(backend);
+        config
+    }
+
+    pub fn default_path() -> Result<PathBuf, std::io::Error> {
+        dirs::home_dir()
+            .map(|p| p.join(".dotmigrate/config.yml"))
+            .ok_or_else(|| std::io::Error::new(std::io::ErrorKind::NotFound, "Home directory not found"))
+    }
+
+    pub fn load(path: &Path) -> Result<Self, anyhow::Error> {
+        let content = std::fs::read_to_string(path)?;
+        let config: Config = serde_yaml::from_str(&content)?;
+        Ok(config)
+    }
+
+    pub fn save(&self, path: &Path) -> Result<(), anyhow::Error> {
+        let content = serde_yaml::to_string(self)?;
+        std::fs::write(path, content)?;
+        Ok(())
+    }
+
+    pub fn find_config() -> Option<PathBuf> {
+        let current_dir = std::env::current_dir().ok()?;
+        let home_dir = dirs::home_dir()?;
+
+        for dir in [current_dir, home_dir] {
+            let config_path = dir.join(".dotmigrate/config.yml");
+            if config_path.exists() {
+                return Some(config_path);
+            }
+            let alt_path = dir.join("dotmigrate.yml");
+            if alt_path.exists() {
+                return Some(alt_path);
+            }
+        }
+
+        None
+    }
+}