diff --git a/lazy-supplements-core/src/config/mod.rs b/lazy-supplements-core/src/config/mod.rs
index 7e2800f..62e1c4d 100644
--- a/lazy-supplements-core/src/config/mod.rs
+++ b/lazy-supplements-core/src/config/mod.rs
@@ -3,31 +3,30 @@ mod storage;
 mod p2p;
 
 use std::path::Path;
-use crate::error::Error;
+use crate::{error::Error, utils::{emptiable::Emptiable, mergeable::Mergeable}};
 pub use error::ConfigError;
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
 
 use tokio::{fs::File, io::{AsyncReadExt, AsyncWriteExt}};
 pub use storage::{StorageConfig, PartialStorageConfig};
 pub use p2p::{P2pConfig, PartialP2pConfig};
-pub trait PartialConfig: Serialize + Sized + DeserializeOwned 
-{
 
-    fn default() -> Self;
-    fn empty() -> Self;
-    fn merge(&mut self, other: Self);
+pub trait Config: TryFrom<Self::PartialConfig>{
+    type PartialConfig: PartialConfig<Config = Self>;
+}
+pub trait PartialConfig: Emptiable + From<Self::Config> + Mergeable {
+    type Config: Config<PartialConfig = Self>;
+
+}
+
+pub trait PartialCoreConfig: DeserializeOwned + Serialize {
+    fn new() -> Self;
     fn from_toml(s: &str) -> Result<Self, toml::de::Error> {
         toml::from_str(s)
     }
     fn into_toml(&self) -> Result<String, toml::ser::Error> {
         toml::to_string(self)
     }
-    fn is_empty(&self) -> bool;
-}
-
-pub trait PartialConfigRoot: DeserializeOwned + Serialize {
-    fn new() -> Self;
-
     async fn read_or_create<T>(path: T) -> Result<Self, Error> 
     where
     T: AsRef<Path>
@@ -67,7 +66,7 @@ pub trait PartialConfigRoot: DeserializeOwned + Serialize {
 mod tests {
     use serde::{Deserialize, Serialize};
 
-    use crate::tests::test_toml_serialize_deserialize;
+    use crate::{tests::test_toml_serialize_deserialize, utils::{emptiable::Emptiable, mergeable::Mergeable}};
 
     use super::{p2p::{P2pConfig, PartialP2pConfig}, PartialConfig};
 
@@ -77,13 +76,14 @@ mod tests {
         p2p: Option<PartialP2pConfig>
     }
 
-    impl PartialConfig for TestConfig {
+    impl Default for TestConfig {
         fn default() -> Self {
             Self {
                 p2p: Some(PartialP2pConfig::default()),
             }
         }
-    
+    }
+    impl Emptiable for TestConfig {
         fn empty() -> Self {
             Self {
                 p2p: None,
@@ -93,7 +93,8 @@ mod tests {
         fn is_empty(&self) -> bool {
             self.p2p.is_none()
         }
-    
+    }
+    impl Mergeable for TestConfig {
         fn merge(&mut self, other: Self) {
             if let Some(p2p) = other.p2p {
                 self.p2p = Some(p2p);
diff --git a/lazy-supplements-core/src/config/p2p.rs b/lazy-supplements-core/src/config/p2p.rs
index fdf96bf..3fa82dc 100644
--- a/lazy-supplements-core/src/config/p2p.rs
+++ b/lazy-supplements-core/src/config/p2p.rs
@@ -11,7 +11,7 @@ use tracing_subscriber::EnvFilter;
 
 use crate::{
     config::PartialConfig,
-    error::Error, p2p
+    error::Error, p2p, utils::emptiable::Emptiable
 };
 
 static DEFAULT_P2P_LISTEN_IPS: &[IpAddr] = &[IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0))];
@@ -86,6 +86,7 @@ mod keypair_parser {
 }
 
 #[cfg_attr(feature="desktop",derive(Args))]
+#[cfg_attr(feature="macros", derive(Emptiable))]
 #[derive(Clone, Debug, Deserialize, Serialize, PartialEq)]
 pub struct PartialP2pConfig {
     #[cfg_attr(feature="desktop",arg(long))]
@@ -96,44 +97,10 @@ pub struct PartialP2pConfig {
     pub port: Option<u16>,
 }
 impl PartialP2pConfig {
-
     pub fn with_new_secret(mut self) -> Self {
         self.secret = Some(keypair_to_base64(&Keypair::generate_ed25519()));
         self
     }
-    pub async fn read_or_create<T>(path: T) -> Result<Self, Error> 
-    where
-    T: AsRef<Path>
-    {
-        if !path.as_ref().exists() {
-            Self::empty().write_to(&path).await?;
-        }
-        Self::read_from(&path).await
-    }
-    pub async fn read_from<T>(path:T) -> Result<Self, Error> 
-    where 
-    T: AsRef<Path>
-    {
-        let mut file = File::open(path.as_ref()).await?;
-        let mut content = String::new();
-        file.read_to_string(&mut content).await?;
-        let config: Self = toml::from_str(&content)?;
-        Ok(config)
-    }
-    pub async fn write_to<T>(&self, path:T) -> Result<(), Error> 
-    where 
-    T: AsRef<Path>
-    {
-        if !path.as_ref().exists() {
-            if let Some(x) = path.as_ref().parent() {
-                std::fs::create_dir_all(x)?;
-            };
-            let _ = File::create(&path).await?;
-        }
-        let mut file = File::create(&path).await?;
-        file.write_all(toml::to_string(self)?.as_bytes()).await?;
-        Ok(())
-    }
 }
 
 impl From<P2pConfig> for PartialP2pConfig {
@@ -146,29 +113,7 @@ impl From<P2pConfig> for PartialP2pConfig {
     }
 }
 
-impl PartialConfig for PartialP2pConfig {
-    fn empty() -> Self {
-        Self {
-            secret: None,
-            listen_ips: None,
-            port: None,
-        }
-    }
-    fn is_empty(&self) -> bool {
-        self.secret.is_none() && self.listen_ips.is_none() && self.port.is_none()
-    }
-    fn merge(&mut self, another: Self) {
-        if let Some(x) = another.secret {
-            self.secret = Some(x);
-        };
-        if let Some(x) = another.listen_ips {
-            self.listen_ips = Some(x);
-        };
-        if let Some(x) = another.port {
-            self.port = Some(x);
-        };
-    }
-    
+impl Default for PartialP2pConfig {
     fn default() -> Self {
         Self {
             secret: None,
diff --git a/lazy-supplements-core/src/config/storage.rs b/lazy-supplements-core/src/config/storage.rs
index 86ce924..5a0071b 100644
--- a/lazy-supplements-core/src/config/storage.rs
+++ b/lazy-supplements-core/src/config/storage.rs
@@ -5,7 +5,7 @@ use clap::Args;
 
 #[cfg(any(test, feature="test"))]
 use tempfile::tempdir;
-use crate::{config::{ConfigError, PartialConfig}};
+use crate::{config::{ConfigError, PartialConfig}, utils::emptiable::Emptiable};
 use libp2p::mdns::Config;
 use serde::{Deserialize, Serialize};
 
@@ -50,6 +50,7 @@ impl TryFrom<PartialStorageConfig> for StorageConfig {
     }
 }
 #[cfg_attr(feature="desktop", derive(Args))]
+#[cfg_attr(feature="macros", derive(Emptiable))]
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct PartialStorageConfig {
     #[cfg_attr(feature="desktop", arg(long))]
@@ -65,27 +66,4 @@ impl From<StorageConfig> for PartialStorageConfig {
             cache_directory: Some(config.cache_directory),
         }
     }
-}
-
-impl PartialConfig for PartialStorageConfig {
-    fn empty() -> Self {
-        Self{
-            data_directory: None,
-            cache_directory: None,
-        }
-    }
-    fn is_empty(&self) -> bool {
-        self.data_directory.is_none() && self.cache_directory.is_none()
-    }
-    fn default() -> Self {
-        todo!()
-    }
-    fn merge(&mut self, other: Self) {
-        if let Some(x) = other.data_directory {
-            self.data_directory = Some(x);
-        }
-        if let Some(x) = other.cache_directory {
-            self.cache_directory = Some(x);
-        }
-    }
 }
\ No newline at end of file
diff --git a/lazy-supplements-core/src/utils/emptiable.rs b/lazy-supplements-core/src/utils/emptiable.rs
index 1535c23..ec5d1c3 100644
--- a/lazy-supplements-core/src/utils/emptiable.rs
+++ b/lazy-supplements-core/src/utils/emptiable.rs
@@ -1,4 +1,6 @@
 use std::collections::{HashMap, HashSet};
+#[cfg(feature="macros")]
+pub use lazy_supplements_macros::Emptiable;
 
 pub trait Emptiable{
     fn empty() -> Self;
diff --git a/lazy-supplements-core/src/utils/mergeable.rs b/lazy-supplements-core/src/utils/mergeable.rs
new file mode 100644
index 0000000..c7b614c
--- /dev/null
+++ b/lazy-supplements-core/src/utils/mergeable.rs
@@ -0,0 +1,14 @@
+pub trait Mergeable: Sized {
+    fn merge(&mut self, other: Self);
+}
+
+impl<T> Mergeable for Option<T> {
+    fn merge(&mut self, mut other: Self) {
+        match other.take() {
+            Some(x) => {
+                let _ = self.insert(x);
+            },
+            None => {}
+        };
+    }
+}
\ No newline at end of file
diff --git a/lazy-supplements-core/src/utils/mod.rs b/lazy-supplements-core/src/utils/mod.rs
index 143105f..1233bee 100644
--- a/lazy-supplements-core/src/utils/mod.rs
+++ b/lazy-supplements-core/src/utils/mod.rs
@@ -1,3 +1,4 @@
 pub mod async_convert;
 pub mod emptiable;
+pub mod mergeable;
 pub mod runnable;
diff --git a/lazy-supplements-core/src/utils/runnable.rs b/lazy-supplements-core/src/utils/runnable.rs
index 34204f2..45b9ecb 100644
--- a/lazy-supplements-core/src/utils/runnable.rs
+++ b/lazy-supplements-core/src/utils/runnable.rs
@@ -1,3 +1,6 @@
+#[cfg(feature="macros")]
+pub use lazy_supplements_macros::Runnable;
+
 pub trait Runnable {
     async fn run(self);
 }
\ No newline at end of file
diff --git a/lazy-supplements-desktop/src/cli/device/add.rs b/lazy-supplements-desktop/src/cli/device/add.rs
index 0314479..b44aa21 100644
--- a/lazy-supplements-desktop/src/cli/device/add.rs
+++ b/lazy-supplements-desktop/src/cli/device/add.rs
@@ -1,6 +1,7 @@
 use clap::Args;
+use crate::utils::runnable::Runnable;
 
-use crate::cli::{ConfigArgs, RunnableCommand};
+use crate::cli::ConfigArgs;
 
 use crate::cli::PeerArgs;
 
@@ -14,7 +15,7 @@ pub struct DeviceAddCommandArgs {
     config: ConfigArgs
 }
 
-impl RunnableCommand for DeviceAddCommandArgs {
+impl Runnable for DeviceAddCommandArgs {
     async fn run(self) {
         todo!()
     }
diff --git a/lazy-supplements-desktop/src/cli/device/list.rs b/lazy-supplements-desktop/src/cli/device/list.rs
index c802d5c..1e9b575 100644
--- a/lazy-supplements-desktop/src/cli/device/list.rs
+++ b/lazy-supplements-desktop/src/cli/device/list.rs
@@ -1,5 +1,5 @@
 use clap::Args;
-
+use crate::utils::runnable::Runnable;
 use crate::cli::{ConfigArgs, RunnableCommand};
 
 #[derive(Debug, Args)]
@@ -8,7 +8,7 @@ pub struct DeviceListCommandArgs{
     config: ConfigArgs
 }
 
-impl RunnableCommand for DeviceListCommandArgs {
+impl Runnable for DeviceListCommandArgs {
     async fn run(self) {
         todo!()
     }
diff --git a/lazy-supplements-desktop/src/cli/device/mod.rs b/lazy-supplements-desktop/src/cli/device/mod.rs
index 64c2747..8632c0f 100644
--- a/lazy-supplements-desktop/src/cli/device/mod.rs
+++ b/lazy-supplements-desktop/src/cli/device/mod.rs
@@ -5,6 +5,7 @@ mod remove;
 mod scan;
 
 pub use add::DeviceAddCommandArgs;
+use crate::utils::runnable::Runnable;
 use libp2p::{Multiaddr, PeerId};
 pub use list::DeviceListCommandArgs;
 pub use ping::DevicePingCommandArgs;
@@ -20,13 +21,14 @@ use crate::{cli::ServerArgs, error::Error};
 use super::ConfigArgs;
 
 
-#[derive(Debug, Args)]
+#[derive(Debug, Args, Runnable)]
 pub struct DeviceCommandArgs {
     #[command(subcommand)]
+    #[runnable]
     pub command: DeviceSubcommand
 }
 
-#[derive(Debug, Subcommand)]
+#[derive(Debug, Subcommand, Runnable)]
 pub enum DeviceSubcommand {
     Add(DeviceAddCommandArgs),
     List(DeviceListCommandArgs),
diff --git a/lazy-supplements-desktop/src/cli/device/ping.rs b/lazy-supplements-desktop/src/cli/device/ping.rs
index af5ac67..d7df432 100644
--- a/lazy-supplements-desktop/src/cli/device/ping.rs
+++ b/lazy-supplements-desktop/src/cli/device/ping.rs
@@ -1,6 +1,6 @@
 use clap::Args;
-
-use crate::cli::{ConfigArgs, PeerArgs, RunnableCommand};
+use crate::utils::runnable::Runnable;
+use crate::cli::{ConfigArgs, PeerArgs};
 
 #[derive(Debug, Args)]
 pub struct DevicePingCommandArgs{
@@ -10,7 +10,7 @@ pub struct DevicePingCommandArgs{
     config: ConfigArgs
 }
 
-impl RunnableCommand for DevicePingCommandArgs {
+impl Runnable for DevicePingCommandArgs {
     async fn run(self) {
         todo!()
     }
diff --git a/lazy-supplements-desktop/src/cli/device/remove.rs b/lazy-supplements-desktop/src/cli/device/remove.rs
index d72db46..f0b84bd 100644
--- a/lazy-supplements-desktop/src/cli/device/remove.rs
+++ b/lazy-supplements-desktop/src/cli/device/remove.rs
@@ -1,5 +1,5 @@
 use clap::Args;
-
+use crate::utils::runnable::Runnable;
 use crate::cli::{ConfigArgs, DeviceArgs, RunnableCommand};
 
 #[derive(Debug, Args)]
@@ -10,7 +10,7 @@ pub struct DeviceRemoveCommandArgs{
     config: ConfigArgs
 }
 
-impl RunnableCommand for DeviceRemoveCommandArgs {
+impl Runnable for DeviceRemoveCommandArgs {
     async fn run(self) {
         todo!()
     }
diff --git a/lazy-supplements-desktop/src/cli/device/scan.rs b/lazy-supplements-desktop/src/cli/device/scan.rs
index 1277c6e..08683b6 100644
--- a/lazy-supplements-desktop/src/cli/device/scan.rs
+++ b/lazy-supplements-desktop/src/cli/device/scan.rs
@@ -1,5 +1,5 @@
 use clap::Args;
-
+use crate::utils::runnable::Runnable;
 use crate::cli::{ConfigArgs, RunnableCommand};
 
 #[derive(Debug, Args)]
@@ -8,7 +8,7 @@ pub struct DeviceScanCommandArgs{
     config: ConfigArgs
 }
 
-impl RunnableCommand for DeviceScanCommandArgs {
+impl Runnable for DeviceScanCommandArgs {
     async fn run(self) {
         todo!()
     }
diff --git a/lazy-supplements-desktop/src/lib.rs b/lazy-supplements-desktop/src/lib.rs
index bfa056c..f2c7e13 100644
--- a/lazy-supplements-desktop/src/lib.rs
+++ b/lazy-supplements-desktop/src/lib.rs
@@ -2,6 +2,7 @@ pub mod cli;
 pub mod config;
 pub mod global;
 pub mod ipc;
+pub mod utils;
 pub use lazy_supplements_core::{
     cache,
     data,
diff --git a/lazy-supplements-desktop/src/utils.rs b/lazy-supplements-desktop/src/utils.rs
new file mode 100644
index 0000000..2996a43
--- /dev/null
+++ b/lazy-supplements-desktop/src/utils.rs
@@ -0,0 +1 @@
+pub use lazy_supplements_core::utils::*;
\ No newline at end of file
diff --git a/lazy-supplements-macros/src/lib.rs b/lazy-supplements-macros/src/lib.rs
index dc35f40..4cbebd2 100644
--- a/lazy-supplements-macros/src/lib.rs
+++ b/lazy-supplements-macros/src/lib.rs
@@ -135,7 +135,6 @@ fn extract_fields(data: &Data) -> &FieldsNamed {
     }
 }
 
-
 #[proc_macro_derive(Emptiable)]
 pub fn emptiable(input: TokenStream) -> TokenStream {
     let input = parse_macro_input!(input as DeriveInput);
@@ -166,11 +165,32 @@ pub fn emptiable(input: TokenStream) -> TokenStream {
                 }
             }.into()
         }
-        Data::Enum(ref fields) => {
-            todo!()
+        _ => panic!("struct or expected, but got other type.")
 
-        }, 
-        _ => panic!("struct or enum expected, but got union.")
+    }
+}
+
+#[proc_macro_derive(Mergeable)]
+pub fn mergeable(input: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(input as DeriveInput);
+    let type_ident = input.ident;
+    match input.data {
+        Data::Struct(ref data) => {
+            let field_idents = extract_idents_and_types_from_data_struct(data);
+            let merge_iter = field_idents.iter().map(|(ident, type_name)| {
+                quote!{
+                    <#type_name as Mergeable>::merge(&mut self.#ident, other.#ident);
+                }
+            });
+            quote!{
+                impl Mergeable for #type_ident {
+                    fn merge(&mut self, mut other: Self){
+                        #(#merge_iter)*
+                    }
+                }
+            }.into()
+        }
+        _ => panic!("struct expected, but got other type.")
 
     }
 }
diff --git a/lazy-supplements-macros/tests/derive_mergeable.rs b/lazy-supplements-macros/tests/derive_mergeable.rs
new file mode 100644
index 0000000..4e71ef1
--- /dev/null
+++ b/lazy-supplements-macros/tests/derive_mergeable.rs
@@ -0,0 +1,32 @@
+use std::collections::{HashMap, HashSet};
+
+use lazy_supplements_core::utils::mergeable::Mergeable;
+use lazy_supplements_macros::Mergeable;
+
+#[derive(Clone, Debug, PartialEq, Mergeable)]
+struct MergeableStruct {
+    opt: Option<u8>,
+}
+
+#[cfg(test)]
+fn test() {
+    let zero = MergeableStruct{
+        opt: Some(0),
+    };
+    let one = MergeableStruct {
+        opt: Some(1),
+    };
+    let none = MergeableStruct{
+        opt: None,
+    };
+    let mut zero_with_one = zero.clone();
+    zero_with_one.merge(one.clone());
+    let mut none_with_zero = none.clone();
+    none_with_zero.merge(zero.clone());
+    let mut zero_with_none = zero.clone();
+    zero_with_none.merge(none.clone());
+    assert_eq!(zero_with_one.clone(), one.clone());
+    assert_eq!(none_with_zero, zero.clone());
+    assert_eq!(zero_with_none, zero.clone());
+    
+}