diff --git a/espanso-config/src/config/mod.rs b/espanso-config/src/config/mod.rs
index 8458eef..47096b6 100644
--- a/espanso-config/src/config/mod.rs
+++ b/espanso-config/src/config/mod.rs
@@ -24,8 +24,8 @@ use thiserror::Error;
 mod parse;
 mod path;
 mod resolve;
-mod store;
 mod util;
+pub(crate) mod store;
 
 pub trait Config {
   fn label(&self) -> &str;
diff --git a/espanso-config/src/config/store.rs b/espanso-config/src/config/store.rs
index 13c2b02..4a0318c 100644
--- a/espanso-config/src/config/store.rs
+++ b/espanso-config/src/config/store.rs
@@ -106,6 +106,13 @@ impl DefaultConfigStore {
       customs,
     })
   }
+
+  pub fn from_configs(default: Box<dyn Config>, customs: Vec<Box<dyn Config>>) -> Result<Self> {
+    Ok(Self {
+      default,
+      customs,
+    })
+  }
 }
 
 #[cfg(test)]
diff --git a/espanso-config/src/legacy/config.rs b/espanso-config/src/legacy/config.rs
index cc8a6f3..cad182d 100644
--- a/espanso-config/src/legacy/config.rs
+++ b/espanso-config/src/legacy/config.rs
@@ -153,13 +153,12 @@ fn default_modulo_path() -> Option<String> {
 fn default_post_inject_delay() -> u64 {
   100
 }
-
 fn default_wait_for_modifiers_release() -> bool {
   false
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct Configs {
+pub struct LegacyConfig {
   #[serde(default = "default_name")]
   pub name: String,
 
@@ -302,7 +301,7 @@ macro_rules! validate_field {
     };
 }
 
-impl Configs {
+impl LegacyConfig {
   /*
    * Validate the Config instance.
    * It makes sure that user defined config instances do not define
@@ -412,8 +411,8 @@ impl Default for BackendType {
   }
 }
 
-impl Configs {
-  fn load_config(path: &Path) -> Result<Configs, ConfigLoadError> {
+impl LegacyConfig {
+  fn load_config(path: &Path) -> Result<LegacyConfig, ConfigLoadError> {
     let file_res = File::open(path);
     if let Ok(mut file) = file_res {
       let mut contents = String::new();
@@ -435,7 +434,7 @@ impl Configs {
     }
   }
 
-  fn merge_overwrite(&mut self, new_config: Configs) {
+  fn merge_overwrite(&mut self, new_config: LegacyConfig) {
     // Merge matches
     let mut merged_matches = new_config.matches;
     let mut match_trigger_set = HashSet::new();
@@ -473,7 +472,7 @@ impl Configs {
     self.global_vars = merged_global_vars;
   }
 
-  fn merge_no_overwrite(&mut self, default: &Configs) {
+  fn merge_no_overwrite(&mut self, default: &LegacyConfig) {
     // Merge matches
     let mut match_trigger_set = HashSet::new();
     self.matches.iter().for_each(|m| {
@@ -527,20 +526,20 @@ fn name_for_global_var(v: &Value) -> String {
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
-pub struct ConfigSet {
-  pub default: Configs,
-  pub specific: Vec<Configs>,
+pub struct LegacyConfigSet {
+  pub default: LegacyConfig,
+  pub specific: Vec<LegacyConfig>,
 }
 
-impl ConfigSet {
-  pub fn load(config_dir: &Path, package_dir: &Path) -> Result<ConfigSet, ConfigLoadError> {
+impl LegacyConfigSet {
+  pub fn load(config_dir: &Path, package_dir: &Path) -> Result<LegacyConfigSet, ConfigLoadError> {
     if !config_dir.is_dir() {
       return Err(ConfigLoadError::InvalidConfigDirectory);
     }
 
     // Load default configuration
     let default_file = config_dir.join(DEFAULT_CONFIG_FILE_NAME);
-    let default = Configs::load_config(default_file.as_path())?;
+    let default = LegacyConfig::load_config(default_file.as_path())?;
 
     // Check that a compatible backend is used, otherwise warn the user
     if cfg!(not(target_os = "linux")) && default.backend == BackendType::Auto {
@@ -569,13 +568,13 @@ impl ConfigSet {
     // Load the user defined config files
 
     let mut name_set = HashSet::new();
-    let mut children_map: HashMap<String, Vec<Configs>> = HashMap::new();
-    let mut package_map: HashMap<String, Vec<Configs>> = HashMap::new();
+    let mut children_map: HashMap<String, Vec<LegacyConfig>> = HashMap::new();
+    let mut package_map: HashMap<String, Vec<LegacyConfig>> = HashMap::new();
     let mut root_configs = Vec::new();
     root_configs.push(default);
 
     let mut file_loader = |entry: walkdir::Result<DirEntry>,
-                           dest_map: &mut HashMap<String, Vec<Configs>>|
+                           dest_map: &mut HashMap<String, Vec<LegacyConfig>>|
      -> Result<(), ConfigLoadError> {
       match entry {
         Ok(entry) => {
@@ -598,12 +597,12 @@ impl ConfigSet {
             .unwrap_or_default()
             .to_str()
             .unwrap_or_default()
-            .starts_with(".")
+            .starts_with('.')
           {
             return Ok(());
           }
 
-          let mut config = Configs::load_config(&path)?;
+          let mut config = LegacyConfig::load_config(&path)?;
 
           // Make sure the config does not contain reserved fields
           if !config.validate_user_defined_config() {
@@ -651,7 +650,7 @@ impl ConfigSet {
     // Merge the children config files
     let mut configs_without_packages = Vec::new();
     for root_config in root_configs {
-      let config = ConfigSet::reduce_configs(root_config, &children_map, true);
+      let config = LegacyConfigSet::reduce_configs(root_config, &children_map, true);
       configs_without_packages.push(config);
     }
 
@@ -660,13 +659,13 @@ impl ConfigSet {
     //       than configs.
     let mut configs = Vec::new();
     for root_config in configs_without_packages {
-      let config = ConfigSet::reduce_configs(root_config, &package_map, false);
+      let config = LegacyConfigSet::reduce_configs(root_config, &package_map, false);
       configs.push(config);
     }
 
     // Separate default from specific
     let default = configs.get(0).unwrap().clone();
-    let mut specific = (&configs[1..]).to_vec().clone();
+    let mut specific = (&configs[1..]).to_vec();
 
     // Add default entries to specific configs when needed
     for config in specific.iter_mut() {
@@ -685,14 +684,14 @@ impl ConfigSet {
       }
     }
 
-    Ok(ConfigSet { default, specific })
+    Ok(LegacyConfigSet { default, specific })
   }
 
   fn reduce_configs(
-    target: Configs,
-    children_map: &HashMap<String, Vec<Configs>>,
+    target: LegacyConfig,
+    children_map: &HashMap<String, Vec<LegacyConfig>>,
     higher_priority: bool,
-  ) -> Configs {
+  ) -> LegacyConfig {
     if children_map.contains_key(&target.name) {
       let mut target = target;
       for children in children_map.get(&target.name).unwrap() {
@@ -709,7 +708,7 @@ impl ConfigSet {
     }
   }
 
-  fn has_conflicts(default: &Configs, specific: &Vec<Configs>) -> bool {
+  fn has_conflicts(default: &LegacyConfig, specific: &[LegacyConfig]) -> bool {
     let mut sorted_triggers: Vec<String> = default
       .matches
       .iter()
@@ -729,7 +728,7 @@ impl ConfigSet {
     has_conflicts
   }
 
-  fn list_has_conflicts(sorted_list: &Vec<String>) -> bool {
+  fn list_has_conflicts(sorted_list: &[String]) -> bool {
     if sorted_list.len() <= 1 {
       return false;
     }
@@ -817,7 +816,7 @@ mod tests {
 
   #[test]
   fn test_config_file_not_found() {
-    let config = Configs::load_config(Path::new("invalid/path"));
+    let config = LegacyConfig::load_config(Path::new("invalid/path"));
     assert_eq!(config.is_err(), true);
     assert_eq!(config.unwrap_err(), ConfigLoadError::FileNotFound);
   }
@@ -825,15 +824,14 @@ mod tests {
   #[test]
   fn test_config_file_with_bad_yaml_syntax() {
     let broken_config_file = create_tmp_file(TEST_CONFIG_FILE_WITH_BAD_YAML);
-    let config = Configs::load_config(broken_config_file.path());
+    let config = LegacyConfig::load_config(broken_config_file.path());
     match config {
-      Ok(_) => assert!(false),
+      Ok(_) => unreachable!(),
       Err(e) => {
         match e {
           ConfigLoadError::InvalidYAML(p, _) => assert_eq!(p, broken_config_file.path().to_owned()),
-          _ => assert!(false),
+          _ => unreachable!(),
         }
-        assert!(true);
       }
     }
   }
@@ -861,7 +859,7 @@ mod tests {
 
         "###,
     );
-    let config = Configs::load_config(working_config_file.path());
+    let config = LegacyConfig::load_config(working_config_file.path());
     assert_eq!(config.unwrap().validate_user_defined_config(), true);
   }
 
@@ -875,7 +873,7 @@ mod tests {
 
         "###,
     );
-    let config = Configs::load_config(working_config_file.path());
+    let config = LegacyConfig::load_config(working_config_file.path());
     assert_eq!(config.unwrap().validate_user_defined_config(), false);
   }
 
@@ -889,7 +887,7 @@ mod tests {
 
         "###,
     );
-    let config = Configs::load_config(working_config_file.path());
+    let config = LegacyConfig::load_config(working_config_file.path());
     assert_eq!(config.unwrap().validate_user_defined_config(), false);
   }
 
@@ -903,7 +901,7 @@ mod tests {
 
         "###,
     );
-    let config = Configs::load_config(working_config_file.path());
+    let config = LegacyConfig::load_config(working_config_file.path());
     assert_eq!(config.unwrap().validate_user_defined_config(), false);
   }
 
@@ -917,14 +915,14 @@ mod tests {
 
         "###,
     );
-    let config = Configs::load_config(working_config_file.path());
+    let config = LegacyConfig::load_config(working_config_file.path());
     assert_eq!(config.unwrap().validate_user_defined_config(), false);
   }
 
   #[test]
   fn test_config_loaded_correctly() {
     let working_config_file = create_tmp_file(TEST_WORKING_CONFIG_FILE);
-    let config = Configs::load_config(working_config_file.path());
+    let config = LegacyConfig::load_config(working_config_file.path());
     assert_eq!(config.is_ok(), true);
   }
 
@@ -981,13 +979,13 @@ mod tests {
   fn test_config_set_default_content_should_work_correctly() {
     let (data_dir, package_dir) = create_temp_espanso_directories();
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path());
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path());
     assert!(config_set.is_ok());
   }
 
   #[test]
   fn test_config_set_load_fail_bad_directory() {
-    let config_set = ConfigSet::load(Path::new("invalid/path"), Path::new("invalid/path"));
+    let config_set = LegacyConfigSet::load(Path::new("invalid/path"), Path::new("invalid/path"));
     assert_eq!(config_set.is_err(), true);
     assert_eq!(
       config_set.unwrap_err(),
@@ -1000,7 +998,7 @@ mod tests {
     let data_dir = TempDir::new().expect("unable to create temp directory");
     let package_dir = TempDir::new().expect("unable to create package directory");
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path());
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path());
     assert_eq!(config_set.is_err(), true);
     assert_eq!(config_set.unwrap_err(), ConfigLoadError::FileNotFound);
   }
@@ -1011,15 +1009,14 @@ mod tests {
       create_temp_espanso_directories_with_default_content(TEST_CONFIG_FILE_WITH_BAD_YAML);
     let default_path = data_dir.path().join(DEFAULT_CONFIG_FILE_NAME);
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path());
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path());
     match config_set {
-      Ok(_) => assert!(false),
+      Ok(_) => unreachable!(),
       Err(e) => {
         match e {
           ConfigLoadError::InvalidYAML(p, _) => assert_eq!(p, default_path),
-          _ => assert!(false),
+          _ => unreachable!(),
         }
-        assert!(true);
       }
     }
   }
@@ -1035,13 +1032,11 @@ mod tests {
         config_caching_interval: 10000
         "###,
     );
-    let user_defined_path_copy = user_defined_path.clone();
-
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path());
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path());
     assert!(config_set.is_err());
     assert_eq!(
       config_set.unwrap_err(),
-      ConfigLoadError::InvalidParameter(user_defined_path_copy)
+      ConfigLoadError::InvalidParameter(user_defined_path)
     )
   }
 
@@ -1056,13 +1051,12 @@ mod tests {
         backend: Clipboard
         "###,
     );
-    let user_defined_path_copy = user_defined_path.clone();
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path());
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path());
     assert!(config_set.is_ok());
     assert_eq!(
       config_set.unwrap().specific[0].name,
-      user_defined_path_copy.to_str().unwrap_or_default()
+      user_defined_path.to_str().unwrap_or_default()
     )
   }
 
@@ -1086,7 +1080,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path());
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path());
     assert!(config_set.is_err());
     assert!(matches!(
       &config_set.unwrap_err(),
@@ -1118,25 +1112,22 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.default.matches.len(), 2);
     assert_eq!(config_set.specific[0].matches.len(), 3);
 
     assert!(config_set.specific[0]
       .matches
       .iter()
-      .find(|x| triggers_for_match(x)[0] == "hello")
-      .is_some());
+      .any(|x| triggers_for_match(x)[0] == "hello"));
     assert!(config_set.specific[0]
       .matches
       .iter()
-      .find(|x| triggers_for_match(x)[0] == ":lol")
-      .is_some());
+      .any(|x| triggers_for_match(x)[0] == ":lol"));
     assert!(config_set.specific[0]
       .matches
       .iter()
-      .find(|x| triggers_for_match(x)[0] == ":yess")
-      .is_some());
+      .any(|x| triggers_for_match(x)[0] == ":yess"));
   }
 
   #[test]
@@ -1163,22 +1154,20 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.default.matches.len(), 2);
     assert_eq!(config_set.specific[0].matches.len(), 2);
 
     assert!(config_set.specific[0]
       .matches
       .iter()
-      .find(|x| {
+      .any(|x| {
         triggers_for_match(x)[0] == ":lol" && replace_for_match(x) == "newstring"
-      })
-      .is_some());
+      }));
     assert!(config_set.specific[0]
       .matches
       .iter()
-      .find(|x| triggers_for_match(x)[0] == ":yess")
-      .is_some());
+      .any(|x| triggers_for_match(x)[0] == ":yess"));
   }
 
   #[test]
@@ -1207,17 +1196,16 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.default.matches.len(), 2);
     assert_eq!(config_set.specific[0].matches.len(), 1);
 
     assert!(config_set.specific[0]
       .matches
       .iter()
-      .find(|x| {
+      .any(|x| {
         triggers_for_match(x)[0] == "hello" && replace_for_match(x) == "newstring"
-      })
-      .is_some());
+      }));
   }
 
   #[test]
@@ -1246,7 +1234,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
   }
 
@@ -1276,7 +1264,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
   }
 
@@ -1300,7 +1288,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 2);
   }
 
@@ -1326,7 +1314,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
     assert_eq!(config_set.default.matches.len(), 2);
     assert!(config_set
@@ -1361,7 +1349,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 1);
     assert_eq!(config_set.default.matches.len(), 1);
     assert!(config_set
@@ -1415,7 +1403,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
     assert_eq!(config_set.default.matches.len(), 3);
     assert!(config_set
@@ -1457,7 +1445,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
     assert_eq!(config_set.default.matches.len(), 1);
     assert!(config_set.default.matches.iter().any(|m| {
@@ -1488,7 +1476,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
     assert_eq!(config_set.default.matches.len(), 2);
     assert!(config_set
@@ -1526,7 +1514,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
     assert_eq!(config_set.default.matches.len(), 1);
     assert_eq!(triggers_for_match(&config_set.default.matches[0])[0], "hasta");
@@ -1554,7 +1542,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 1);
     assert_eq!(config_set.default.matches.len(), 1);
     assert!(config_set
@@ -1604,7 +1592,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 1);
     assert_eq!(config_set.default.matches.len(), 1);
     assert!(config_set
@@ -1625,7 +1613,7 @@ mod tests {
   #[test]
   fn test_list_has_conflict_no_conflict() {
     assert_eq!(
-      ConfigSet::list_has_conflicts(&vec!(":ab".to_owned(), ":bc".to_owned())),
+      LegacyConfigSet::list_has_conflicts(&[":ab".to_owned(), ":bc".to_owned()]),
       false
     );
   }
@@ -1634,7 +1622,7 @@ mod tests {
   fn test_list_has_conflict_conflict() {
     let mut list = vec!["ac".to_owned(), "ab".to_owned(), "abc".to_owned()];
     list.sort();
-    assert_eq!(ConfigSet::list_has_conflicts(&list), true);
+    assert_eq!(LegacyConfigSet::list_has_conflicts(&list), true);
   }
 
   #[test]
@@ -1661,9 +1649,9 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(
-      ConfigSet::has_conflicts(&config_set.default, &config_set.specific),
+      LegacyConfigSet::has_conflicts(&config_set.default, &config_set.specific),
       false
     );
   }
@@ -1694,9 +1682,9 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(
-      ConfigSet::has_conflicts(&config_set.default, &config_set.specific),
+      LegacyConfigSet::has_conflicts(&config_set.default, &config_set.specific),
       true
     );
   }
@@ -1725,9 +1713,9 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(
-      ConfigSet::has_conflicts(&config_set.default, &config_set.specific),
+      LegacyConfigSet::has_conflicts(&config_set.default, &config_set.specific),
       true
     );
   }
@@ -1767,9 +1755,9 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(
-      ConfigSet::has_conflicts(&config_set.default, &config_set.specific),
+      LegacyConfigSet::has_conflicts(&config_set.default, &config_set.specific),
       false
     );
   }
@@ -1798,7 +1786,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 1);
     assert_eq!(config_set.default.global_vars.len(), 1);
     assert_eq!(config_set.specific[0].global_vars.len(), 2);
@@ -1837,7 +1825,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 0);
     assert_eq!(config_set.default.global_vars.len(), 2);
     assert!(config_set
@@ -1878,7 +1866,7 @@ mod tests {
         "###,
     );
 
-    let config_set = ConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
+    let config_set = LegacyConfigSet::load(data_dir.path(), package_dir.path()).unwrap();
     assert_eq!(config_set.specific.len(), 1);
     assert_eq!(config_set.default.global_vars.len(), 1);
     assert_eq!(config_set.specific[0].global_vars.len(), 1);
diff --git a/espanso-config/src/legacy/mod.rs b/espanso-config/src/legacy/mod.rs
index 31db2f7..9b1b23d 100644
--- a/espanso-config/src/legacy/mod.rs
+++ b/espanso-config/src/legacy/mod.rs
@@ -1,7 +1,7 @@
 /*
  * This file is part of espanso.
  *
- * Copyright (C) 2019-2021 Federico Terzi
+ * C title: (), class: (), exec: ()opyright (C) 2019-2021 Federico Terzi
  *
  * espanso is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,16 +17,313 @@
  * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::path::Path;
 use anyhow::Result;
+use regex::Regex;
+use std::{collections::HashMap, path::Path};
 
-use crate::{config::ConfigStore, matches::store::MatchStore};
+use self::config::LegacyConfig;
+use crate::config::store::DefaultConfigStore;
+use crate::matches::group::loader::yaml::parse::{YAMLMatch, YAMLVariable};
+use crate::{
+  config::Config,
+  config::{AppProperties, ConfigStore},
+  matches::{
+    store::{MatchSet, MatchStore},
+    Match, Variable,
+  },
+};
+use std::convert::TryInto;
 
 mod config;
 mod model;
 
-pub fn load(base_dir: &Path) -> Result<(Box<dyn ConfigStore>, Box<dyn MatchStore>)> {
-  // TODO: load legacy config set and then convert it to the new format 
+pub fn load(
+  base_dir: &Path,
+  package_dir: &Path,
+) -> Result<(Box<dyn ConfigStore>, Box<dyn MatchStore>)> {
+  let config_set = config::LegacyConfigSet::load(base_dir, package_dir)?;
 
-  todo!()
-}
\ No newline at end of file
+  let (default_config, default_match_group) = split_config(config_set.default);
+  let mut match_groups = HashMap::new();
+  match_groups.insert("default".to_string(), default_match_group);
+
+  let mut custom_configs: Vec<Box<dyn Config>> = Vec::new();
+  for custom in config_set.specific {
+    let (custom_config, custom_match_group) = split_config(custom);
+    match_groups.insert(custom_config.name.clone(), custom_match_group);
+    custom_configs.push(Box::new(custom_config));
+  }
+
+  let config_store = DefaultConfigStore::from_configs(Box::new(default_config), custom_configs)?;
+  let match_store = LegacyMatchStore::new(match_groups);
+
+  Ok((Box::new(config_store), Box::new(match_store)))
+}
+
+fn split_config(config: LegacyConfig) -> (LegacyInteropConfig, LegacyMatchGroup) {
+  let global_vars = config
+    .global_vars
+    .iter()
+    .filter_map(|var| {
+      let var: YAMLVariable = serde_yaml::from_value(var.clone()).ok()?;
+      let var: Variable = var.try_into().ok()?;
+      Some(var)
+    })
+    .collect();
+
+  let matches = config
+    .matches
+    .iter()
+    .filter_map(|var| {
+      let m: YAMLMatch = serde_yaml::from_value(var.clone()).ok()?;
+      let m: Match = m.try_into().ok()?;
+      Some(m)
+    })
+    .collect();
+
+  let match_group = LegacyMatchGroup {
+    global_vars,
+    matches,
+  };
+
+  let config: LegacyInteropConfig = config.into();
+  (config, match_group)
+}
+
+struct LegacyInteropConfig {
+  pub name: String,
+
+  match_paths: Vec<String>,
+
+  filter_title: Option<Regex>,
+  filter_class: Option<Regex>,
+  filter_exec: Option<Regex>,
+}
+
+impl From<config::LegacyConfig> for LegacyInteropConfig {
+  fn from(config: config::LegacyConfig) -> Self {
+    Self {
+      name: config.name.clone(),
+      match_paths: vec![config.name],
+      filter_title: if !config.filter_title.is_empty() {
+        Regex::new(&config.filter_title).ok()
+      } else {
+        None
+      },
+      filter_class: if !config.filter_class.is_empty() {
+        Regex::new(&config.filter_class).ok()
+      } else {
+        None
+      },
+      filter_exec: if !config.filter_exec.is_empty() {
+        Regex::new(&config.filter_exec).ok()
+      } else {
+        None
+      },
+    }
+  }
+}
+
+impl Config for LegacyInteropConfig {
+  fn label(&self) -> &str {
+    &self.name
+  }
+
+  fn match_paths(&self) -> &[String] {
+    &self.match_paths
+  }
+
+  fn is_match(&self, app: &AppProperties) -> bool {
+    if self.filter_title.is_none() && self.filter_exec.is_none() && self.filter_class.is_none() {
+      return false;
+    }
+
+    let is_title_match = if let Some(title_regex) = self.filter_title.as_ref() {
+      if let Some(title) = app.title {
+        title_regex.is_match(title)
+      } else {
+        false
+      }
+    } else {
+      true
+    };
+
+    let is_exec_match = if let Some(exec_regex) = self.filter_exec.as_ref() {
+      if let Some(exec) = app.exec {
+        exec_regex.is_match(exec)
+      } else {
+        false
+      }
+    } else {
+      true
+    };
+
+    let is_class_match = if let Some(class_regex) = self.filter_class.as_ref() {
+      if let Some(class) = app.class {
+        class_regex.is_match(class)
+      } else {
+        false
+      }
+    } else {
+      true
+    };
+
+    // All the filters that have been specified must be true to define a match
+    is_exec_match && is_title_match && is_class_match
+  }
+}
+
+struct LegacyMatchGroup {
+  matches: Vec<Match>,
+  global_vars: Vec<Variable>,
+}
+
+struct LegacyMatchStore {
+  groups: HashMap<String, LegacyMatchGroup>,
+}
+
+impl LegacyMatchStore {
+  pub fn new(groups: HashMap<String, LegacyMatchGroup>) -> Self {
+    Self { groups }
+  }
+}
+
+impl MatchStore for LegacyMatchStore {
+  fn query(&self, paths: &[String]) -> MatchSet {
+    let group = if !paths.is_empty() {
+      if let Some(group) = self.groups.get(&paths[0]) {
+        Some(group)
+      } else {
+        None
+      }
+    } else {
+      None
+    };
+
+    if let Some(group) = group {
+      MatchSet {
+        matches: group.matches.iter().collect(),
+        global_vars: group.global_vars.iter().collect(),
+      }
+    } else {
+      MatchSet {
+        matches: Vec::new(),
+        global_vars: Vec::new(),
+      }
+    }
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  use std::{fs::create_dir_all, path::Path};
+  use tempdir::TempDir;
+
+  pub fn use_test_directory(callback: impl FnOnce(&Path, &Path, &Path)) {
+    let dir = TempDir::new("tempconfig").unwrap();
+    let user_dir = dir.path().join("user");
+    create_dir_all(&user_dir).unwrap();
+
+    let package_dir = TempDir::new("tempconfig").unwrap();
+
+    callback(
+      &dunce::canonicalize(&dir.path()).unwrap(),
+      &dunce::canonicalize(&user_dir).unwrap(),
+      &dunce::canonicalize(&package_dir.path()).unwrap(),
+    );
+  }
+
+  #[test]
+  fn load_legacy_works_correctly() {
+    use_test_directory(|base, user, packages| {
+      std::fs::write(base.join("default.yml"), r#"
+      backend: Clipboard
+
+      global_vars:
+        - name: var1
+          type: test
+
+      matches:
+        - trigger: "hello"
+          replace: "world"
+      "#).unwrap();
+
+      std::fs::write(user.join("specific.yml"), r#"
+      name: specific
+      parent: default
+
+      matches:
+        - trigger: "foo"
+          replace: "bar"
+      "#).unwrap();
+
+      std::fs::write(user.join("separate.yml"), r#"
+      name: separate
+      filter_title: "Google"
+
+      matches:
+        - trigger: "eren"
+          replace: "mikasa"
+      "#).unwrap();
+
+      let (config_store, match_store) = load(base, packages).unwrap();
+
+      let default_config = config_store.default();
+      assert_eq!(default_config.match_paths().len(), 1);
+
+      let active_config = config_store.active(&AppProperties {
+        title: Some("Google"),
+        class: None,
+        exec: None,
+      });
+      assert_eq!(active_config.match_paths().len(), 1);
+
+      let default_fallback = config_store.active(&AppProperties {
+        title: Some("Yahoo"),
+        class: None,
+        exec: None,
+      });
+      assert_eq!(default_fallback.match_paths().len(), 1);
+
+      assert_eq!(match_store.query(default_config.match_paths()).matches.len(), 2); 
+      assert_eq!(match_store.query(default_config.match_paths()).global_vars.len(), 1); 
+      
+      assert_eq!(match_store.query(active_config.match_paths()).matches.len(), 3); 
+      assert_eq!(match_store.query(active_config.match_paths()).global_vars.len(), 1); 
+
+      assert_eq!(match_store.query(default_fallback.match_paths()).matches.len(), 2); 
+      assert_eq!(match_store.query(default_fallback.match_paths()).global_vars.len(), 1); 
+    });
+  }
+
+  #[test]
+  fn load_legacy_with_packages() {
+    use_test_directory(|base, user, packages| {
+      std::fs::write(base.join("default.yml"), r#"
+      backend: Clipboard
+
+      matches:
+        - trigger: "hello"
+          replace: "world"
+      "#).unwrap();
+
+      create_dir_all(packages.join("test-package")).unwrap();
+      std::fs::write(packages.join("test-package").join("package.yml"), r#"
+      name: test-package 
+      parent: default
+
+      matches:
+        - trigger: "foo"
+          replace: "bar"
+      "#).unwrap();
+
+      let (config_store, match_store) = load(base, packages).unwrap();
+
+      let default_config = config_store.default();
+      assert_eq!(default_config.match_paths().len(), 1);
+
+      assert_eq!(match_store.query(default_config.match_paths()).matches.len(), 2); 
+    });
+  }
+}
diff --git a/espanso-config/src/matches/group/loader/mod.rs b/espanso-config/src/matches/group/loader/mod.rs
index 7e931ee..574269a 100644
--- a/espanso-config/src/matches/group/loader/mod.rs
+++ b/espanso-config/src/matches/group/loader/mod.rs
@@ -25,7 +25,7 @@ use self::yaml::YAMLImporter;
 
 use super::MatchGroup;
 
-mod yaml;
+pub(crate) mod yaml;
 
 trait Importer {
   fn is_supported(&self, extension: &str) -> bool;
diff --git a/espanso-config/src/matches/group/loader/yaml/mod.rs b/espanso-config/src/matches/group/loader/yaml/mod.rs
index 74e699d..5b46238 100644
--- a/espanso-config/src/matches/group/loader/yaml/mod.rs
+++ b/espanso-config/src/matches/group/loader/yaml/mod.rs
@@ -31,7 +31,7 @@ use crate::matches::{MatchCause, MatchEffect, TextEffect, TriggerCause};
 
 use super::Importer;
 
-mod parse;
+pub(crate) mod parse;
 
 pub(crate) struct YAMLImporter {}
 
diff --git a/espanso-config/src/matches/group/mod.rs b/espanso-config/src/matches/group/mod.rs
index 5943a35..ae7aff0 100644
--- a/espanso-config/src/matches/group/mod.rs
+++ b/espanso-config/src/matches/group/mod.rs
@@ -22,7 +22,7 @@ use std::path::Path;
 
 use super::{Match, Variable};
 
-mod loader;
+pub(crate) mod loader;
 mod path;
 
 #[derive(Debug, Clone, PartialEq)]
diff --git a/espanso-config/src/matches/mod.rs b/espanso-config/src/matches/mod.rs
index a4b4a42..f5208b8 100644
--- a/espanso-config/src/matches/mod.rs
+++ b/espanso-config/src/matches/mod.rs
@@ -21,7 +21,7 @@ use serde_yaml::Mapping;
 
 use crate::counter::{next_id, StructId};
 
-mod group;
+pub(crate) mod group;
 pub mod store;
 
 #[derive(Debug, Clone)]