6 files changed, 26 insertions, 14 deletions
diff --git a/docs/pages/3-define-a-chain.md b/docs/pages/3-define-a-chain.md
index b2822bc..450522b 100644
--- a/docs/pages/3-define-a-chain.md
+++ b/docs/pages/3-define-a-chain.md
@@ -48,7 +48,7 @@ You've probably guessed it — `pack!(ResultName = String)` defines a type that
 ```rust
 // pack!(ResultName = String) generates code roughly like this
  
-#[derive(Groupped)]
+#[derive(Grouped)]
 pub struct ResultName {
     pub inner: String,
 }
diff --git a/docs/pages/7-argument-parse-clap.md b/docs/pages/7-argument-parse-clap.md
index b11e00e..86fce35 100644
--- a/docs/pages/7-argument-parse-clap.md
+++ b/docs/pages/7-argument-parse-clap.md
@@ -25,7 +25,7 @@ Add `#[dispatcher_clap]` on a `clap::Parser` struct to auto-generate a Dispatche
 // Dependencies:
 // clap = "4"
 @@@ use mingling::macros::dispatcher_clap;
-#[derive(Default, clap::Parser, Groupped)]
+#[derive(Default, clap::Parser, Grouped)]
 #[dispatcher_clap("greet", CMDGreet, help = true, error = ErrorGreetParsed)]
 pub struct EntryGreet {
     #[clap(default_value = "World")]
@@ -64,7 +64,7 @@ If you need `--help` support, register `BasicProgramSetup` in main and set the c
 // clap = "4"
 @@@use mingling::setup::BasicProgramSetup;
 @@@use mingling::macros::dispatcher_clap;
-@@@#[derive(Default, clap::Parser, Groupped)]
+@@@#[derive(Default, clap::Parser, Grouped)]
 @@@#[dispatcher_clap("greet", CMDGreet)]
 @@@pub struct EntryGreet {
 @@@    name: String,
diff --git a/docs/pages/advanced/2-structural-renderer.md b/docs/pages/advanced/2-structural-renderer.md
index fab7530..910b197 100644
--- a/docs/pages/advanced/2-structural-renderer.md
+++ b/docs/pages/advanced/2-structural-renderer.md
@@ -62,7 +62,7 @@ When the user passes `--json`, the framework automatically serializes the render
 
 ## Customizing Output Structure
 
-The default output from `pack_structural!` includes an `inner` field. For full control over the output structure, define the type manually with `#[derive(StructuralData, Serialize, Groupped)]`:
+The default output from `pack_structural!` includes an `inner` field. For full control over the output structure, define the type manually with `#[derive(StructuralData, Serialize, Grouped)]`:
 
 ```rust
 // Features: ["structural_renderer"]
@@ -74,7 +74,7 @@ The default output from `pack_structural!` includes an `inner` field. For full c
 @@@use serde::Serialize;
 @@@dispatcher!("render", CMDRender => EntryRender);
  
-#[derive(Serialize, StructuralData, Groupped)]
+#[derive(Serialize, StructuralData, Grouped)]
 struct Info {
     name: String,
     age: i32,
diff --git a/docs/pages/concepts/3-any-output.md b/docs/pages/concepts/3-any-output.md
index f780377..f02805f 100644
--- a/docs/pages/concepts/3-any-output.md
+++ b/docs/pages/concepts/3-any-output.md
@@ -20,7 +20,7 @@ AnyOutput<G>
  
 Here `G` is the program enum generated by `gen_program!()` (i.e., `ThisProgram` as you know it).
 
-Each type annotated with `pack!` or `#[derive(Groupped)]` is assigned to one variant of this enum.
+Each type annotated with `pack!` or `#[derive(Grouped)]` is assigned to one variant of this enum.
 
 ## ChainProcess: Data + Routing
 
@@ -38,17 +38,17 @@ This is why a Chain function returns `ChainProcess` instead of raw data—it bun
 
 The dispatcher reads `NextProcess` to decide whether to continue the loop or exit to rendering.
 
-## Groupped: Who Is Who
+## Grouped: Who Is Who
 
-How does the dispatcher know whether an `AnyOutput` holds a `ResultName` or an `ErrorUserBlocked`? The answer is the `Groupped` trait:
+How does the dispatcher know whether an `AnyOutput` holds a `ResultName` or an `ErrorUserBlocked`? The answer is the `Grouped` trait:
 
 ```
-trait Groupped<G> {
+trait Grouped<G> {
     fn member_id() -> G;
 }
 ```
  
-When you use `pack!(ResultName = String)`, the macro automatically implements `Groupped` for `ResultName`, and `member_id()` returns the corresponding enum variant. The dispatcher looks at `member_id` and finds the matching Chain or Renderer.
+When you use `pack!(ResultName = String)`, the macro automatically implements `Grouped` for `ResultName`, and `member_id()` returns the corresponding enum variant. The dispatcher looks at `member_id` and finds the matching Chain or Renderer.
 
 `to_chain()` and `to_render()` are essentially convenience methods on `AnyOutput` that construct `ChainProcess::Ok(any, Chain)` and `ChainProcess::Ok(any, Renderer)` respectively.
 
diff --git a/docs/pages/other/features.md b/docs/pages/other/features.md
index 325bb75..7994d4c 100644
--- a/docs/pages/other/features.md
+++ b/docs/pages/other/features.md
@@ -171,7 +171,7 @@ fn handle_hello(args: EntryHello) {}
 ### `group!`
 
 Registers an external type as a member of the program group without modifying its definition.
-The type's simple name is used as the enum variant, just like `pack!` or `#[derive(Groupped)]`.
+The type's simple name is used as the enum variant, just like `pack!` or `#[derive(Grouped)]`.
 
 ```rust
 // Features: ["extra_macros"]
@@ -274,12 +274,24 @@ See [example](https://mingling-rs.github.io/mingling/docs/example-viewer.html?na
 
 **Description:**
 
-Enables the parser module, providing text parsing and analysis capabilities.
+Enables the argument parser module, providing argument parsing functionality.
 
-When enabled, you can use `Picker` for zero-cost argument extraction, supporting methods like `pick()` and `pick_or()`.
+When enabled, you can use `Picker` for simple argument extraction, supporting methods like `pick()` and `pick_or()`.
 
 See [example](https://mingling-rs.github.io/mingling/docs/example-viewer.html?name=example-argument-parse)
 
+## Feature `picker`
+
+**Description:**
+
+Introduces the `arg-picker` dependency, providing more advanced argument parsing capabilities for Mingling.
+
+It can coexist with the `parser` and `clap` features, but it is recommended not to enable it alongside the `parser` feature, as their APIs are very similar.
+
+`picker` is an argument parser independent of Mingling and does not rely on the built-in argument extraction API of `mingling_core`.
+
+See [example](https://mingling-rs.github.io/mingling/docs/example-viewer.html?name=example-argument-picker)
+
 ## Feature `repl`
 
 **Description:**
diff --git a/docs/pages/other/naming_rule.md b/docs/pages/other/naming_rule.md
index 2ede61f..089a711 100644
--- a/docs/pages/other/naming_rule.md
+++ b/docs/pages/other/naming_rule.md
@@ -96,7 +96,7 @@ Result + Content
 | `ResultGreetSomeone` | Greeting result   |
 | `ResultFruitList`    | Fruit list result |
 
-Result structs are expected to be consumed by the Renderer, and their internal structure should be designed for rendering aesthetics. Generally use `#[derive(Groupped)]` instead of `pack!()` wrapping for more flexible field control.
+Result structs are expected to be consumed by the Renderer, and their internal structure should be designed for rendering aesthetics. Generally use `#[derive(Grouped)]` instead of `pack!()` wrapping for more flexible field control.
 
 ### Error