diff --git a/bin/subalfred/src/command/check/runtime.rs b/bin/subalfred/src/command/check/runtime.rs
index 275bad9a..adbebd97 100644
--- a/bin/subalfred/src/command/check/runtime.rs
+++ b/bin/subalfred/src/command/check/runtime.rs
@@ -13,7 +13,7 @@ pub(crate) struct RuntimeCmd {
 	#[arg(long, required = true, value_name = "PATH")]
 	executable: String,
 	/// Pass this name to `--chain` to launch the local chain.
-	#[arg(long, required = true, value_name = "NAME")]
+	#[arg(long, required = true, value_name = "CHAIN")]
 	chain: String,
 	/// Live chain's HTTP RPC endpoint.
 	#[arg(long, required = true, value_name = "URI")]
diff --git a/bin/subalfred/src/command/convert/ascii2hex.rs b/bin/subalfred/src/command/convert/ascii2hex.rs
index 59160257..0808f895 100644
--- a/bin/subalfred/src/command/convert/ascii2hex.rs
+++ b/bin/subalfred/src/command/convert/ascii2hex.rs
@@ -7,7 +7,7 @@ use crate::prelude::*;
 #[derive(Debug, Args)]
 pub(crate) struct Ascii2HexCmd {
 	/// Ascii data input.
-	#[arg(required = true, value_name = "ASCII DATA")]
+	#[arg(required = true, value_name = "ASCII")]
 	data: String,
 }
 impl Ascii2HexCmd {
diff --git a/bin/subalfred/src/command/convert/bytes_style.rs b/bin/subalfred/src/command/convert/bytes_style.rs
index b15ebc0a..1b525299 100644
--- a/bin/subalfred/src/command/convert/bytes_style.rs
+++ b/bin/subalfred/src/command/convert/bytes_style.rs
@@ -11,10 +11,10 @@ pub(crate) struct BytesStyleCmd {
 	#[arg(required = true, value_name = "BYTES")]
 	bytes: String,
 	/// Origin style.
-	#[arg(value_enum, long, required = true, value_name = "BYTES STYLE")]
+	#[arg(value_enum, long, required = true, value_name = "STYLE")]
 	from: BytesStringKind,
 	/// Target style.
-	#[arg(value_enum, long, required = true, value_name = "BYTES STYLE")]
+	#[arg(value_enum, long, required = true, value_name = "STYLE")]
 	to: BytesStringKind,
 }
 impl BytesStyleCmd {
diff --git a/bin/subalfred/src/command/impl/src/lib.rs b/bin/subalfred/src/command/impl/src/lib.rs
index c3f2dff6..e29a0b5c 100644
--- a/bin/subalfred/src/command/impl/src/lib.rs
+++ b/bin/subalfred/src/command/impl/src/lib.rs
@@ -18,7 +18,7 @@ pub fn cmd(_: TokenStream, input: TokenStream) -> TokenStream {
 	let ItemEnum {
 		attrs: cmd_attrs, vis: cmd_vis, ident: cmd_name, variants: cmd_variants, ..
 	} = cmd_enum;
-	let cmd_variants_names =
+	let cmd_variant_names =
 		cmd_variants.iter().map(|variant| variant.ident.clone()).collect::<Vec<_>>();
 	let cmd_variants = cmd_variants
 		.into_iter()
@@ -42,7 +42,7 @@ pub fn cmd(_: TokenStream, input: TokenStream) -> TokenStream {
 			#cmd_vis fn run(&self) -> crate::prelude::Result<()> {
 				match self {
 					#(
-						Self::#cmd_variants_names(cmd) => cmd.run(),
+						Self::#cmd_variant_names(cmd) => cmd.run(),
 					)*
 				}
 			}
diff --git a/bin/subalfred/src/command/state/export.rs b/bin/subalfred/src/command/state/export.rs
index 3196bfe9..974de055 100644
--- a/bin/subalfred/src/command/state/export.rs
+++ b/bin/subalfred/src/command/state/export.rs
@@ -13,6 +13,8 @@ pub(crate) struct ExportCmd {
 	#[arg(required = true, value_name = "URI")]
 	live: String,
 	/// Export the data starting from this block.
+	///
+	/// Accept block hash or block number.
 	#[arg(long, value_name = "HASH/NUM")]
 	at: Option<String>,
 	/// Timeout for the fetching.
diff --git a/bin/subalfred/src/command/storage_key.rs b/bin/subalfred/src/command/storage_key.rs
index c36c606e..bde6d39a 100644
--- a/bin/subalfred/src/command/storage_key.rs
+++ b/bin/subalfred/src/command/storage_key.rs
@@ -8,10 +8,10 @@ use crate::prelude::*;
 #[derive(Debug, Args)]
 pub(crate) struct StorageKeyCmd {
 	/// Prefix of the storage.
-	#[arg(long, required = true, value_name = "PREFIX")]
+	#[arg(long, required = true, value_name = "NAME")]
 	pallet: String,
 	/// Name of the storage item.
-	#[arg(long, required = true, value_name = "ITEM")]
+	#[arg(long, required = true, value_name = "NAME")]
 	item: String,
 }
 impl StorageKeyCmd {
diff --git a/lib/core/src/cargo/mod.rs b/lib/core/src/cargo/mod.rs
index 928f4d73..8930f4a1 100644
--- a/lib/core/src/cargo/mod.rs
+++ b/lib/core/src/cargo/mod.rs
@@ -85,17 +85,17 @@ pub async fn update_member_versions(to: &str, manifest_path: &str) -> Result<()>
 	};
 	let mut tasks = stream::iter(&members)
 		.map(|pkg| async {
-			let members_deps = pkg
+			let member_deps = pkg
 				.dependencies
 				.iter()
 				.filter(|dep| members.iter().any(|pkg| dep.name == pkg.name))
 				.collect::<Vec<_>>();
 			let content = system::read_file_to_string(&pkg.manifest_path)?;
 			let content = content.replacen(&pkg.version.to_string(), to, 1);
-			let content = if members_deps.is_empty() {
+			let content = if member_deps.is_empty() {
 				Cow::Owned(content)
 			} else {
-				util::find_member_dep_regex(&members_deps).replace_all(
+				util::find_member_dep_regex(&member_deps).replace_all(
 					&content,
 					|caps: &Captures| {
 						format!("{}\"{}\"", &caps[1], util::align_version(&caps[3], to))
diff --git a/lib/core/src/cargo/util.rs b/lib/core/src/cargo/util.rs
index b54e693f..b0ea987f 100644
--- a/lib/core/src/cargo/util.rs
+++ b/lib/core/src/cargo/util.rs
@@ -25,10 +25,10 @@ pub fn find_package<'a>(metadata: &'a Metadata, id: &PackageId) -> Option<&'a Pa
 	metadata.packages.iter().find(|pkg| &pkg.id == id)
 }
 
-pub fn find_member_dep_regex(members_deps: &[&Dependency]) -> Regex {
+pub fn find_member_dep_regex(member_deps: &[&Dependency]) -> Regex {
 	Regex::new(&format!(
 		"(({}) *?= *?\\{{ *?version *?= *?)\"(.+?)\"",
-		members_deps.iter().map(|dep| dep.name.replace('-', "\\-")).collect::<Vec<_>>().join("|"),
+		member_deps.iter().map(|dep| dep.name.replace('-', "\\-")).collect::<Vec<_>>().join("|"),
 	))
 	.expect("[core::cargo] build constant regex never fails; qed")
 }
diff --git a/lib/core/src/jsonrpc/mod.rs b/lib/core/src/jsonrpc/mod.rs
index 6a7fe1b8..7fc71c9a 100644
--- a/lib/core/src/jsonrpc/mod.rs
+++ b/lib/core/src/jsonrpc/mod.rs
@@ -16,6 +16,7 @@ use crate::prelude::*;
 /// JSONRPC Id.
 pub type Id = usize;
 
+// TODO: doc
 /// Generic JSONRPC request.
 #[allow(missing_docs)]
 #[derive(Debug, Serialize)]
@@ -27,6 +28,7 @@ pub struct Request<'a, P> {
 	pub method: &'a str,
 	pub params: P,
 }
+// TODO: doc
 /// Raw JSONRPC request.
 #[allow(missing_docs)]
 #[derive(Debug)]
@@ -40,6 +42,7 @@ impl<'a, P> From<(&'a str, P)> for RawRequest<'a, P> {
 	}
 }
 
+// TODO: doc
 /// Generic JSONRPC response.
 #[allow(missing_docs)]
 #[derive(Debug, Deserialize)]
diff --git a/substrate-minimal/subrpcer/src/client/r.rs b/substrate-minimal/subrpcer/src/client/r.rs
index cf4675a4..541d50fd 100644
--- a/substrate-minimal/subrpcer/src/client/r.rs
+++ b/substrate-minimal/subrpcer/src/client/r.rs
@@ -5,9 +5,11 @@ use once_cell::sync::Lazy;
 use reqwest::{Client, Error, Response};
 use serde_json::Value;
 
+#[allow(unused)]
 static CLIENT: Lazy<Arc<Client>> = Lazy::new(|| Arc::new(Client::new()));
 
 /// A simple HTTP post helper which implements with [reqwest](https://crates.io/crates/reqwest).
+#[allow(unused)]
 pub async fn send_jsonrpc(uri: &str, json: &Value) -> Result<Response, Error> {
 	CLIENT.post(uri).json(json).send().await
 }
diff --git a/substrate-minimal/subrpcer/src/client/u.rs b/substrate-minimal/subrpcer/src/client/u.rs
index 52ab290d..c2e8114f 100644
--- a/substrate-minimal/subrpcer/src/client/u.rs
+++ b/substrate-minimal/subrpcer/src/client/u.rs
@@ -3,6 +3,7 @@ use serde_json::Value;
 use ureq::{Error, Response};
 
 /// A simple HTTP post helper which implements with [ureq](https://crates.io/crates/ureq).
+#[allow(unused, clippy::result_large_err)]
 pub fn send_jsonrpc(uri: &str, body: &Value) -> Result<Response, Error> {
 	ureq::post(uri)
 		.set("Content-Type", "application/json;charset=utf-8")