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+Advanced
diff --git a/docs/pages/advanced/1-completion.md b/docs/pages/advanced/1-completion.md
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+<h1 align="center">Completion</h1>
+<p align="center">
+    Fully dynamic completion system via the `comp` feature
+</p>
+
+Mingling's completion is **fully dynamic** — no static completion files, suggestions are computed at runtime based on the user's current input.
+
+## Enable `comp`
+
+```toml
+# Cargo.toml
+[dependencies.mingling]
+features = ["comp"]
+ 
+[build-dependencies.mingling]
+features = [
+    "comp",
+    # Enable `builds` for build-time support
+    "builds"
+]
+```
+ 
+## How it works
+
+When the user presses `TAB`, the completion script calls the program's hidden subcommand `__comp`, which dynamically queries the best suggestions based on the provided `ShellContext`.
+
+This hidden subcommand is auto-generated by `gen_program!()` when the `comp` feature is enabled. Its dispatcher is `CMDCompletion` — you need to add it to your program via `with_dispatcher`.
+
+Completion flow:
+
+1. Re-match the user's current input to a `Dispatcher`
+2. Call the corresponding `#[completion]` function
+3. The function returns a `Suggest` (file completion or a list of suggestions)
+4. Notify the shell to display the suggestions
+
+## Define completions
+
+Use `#[completion(EntryType)]` to define completion logic for an Entry:
+
+```rust
+// Features: ["comp"]
+@@@use mingling::prelude::*;
+@@@use mingling::{ShellContext, Suggest, SuggestItem};
+@@@use std::collections::BTreeSet;
+@@@dispatcher!("greet", CMDGreet => EntryGreet);
+ 
+#[completion(EntryGreet)]
+fn complete_greet(ctx: &ShellContext) -> Suggest {
+    if ctx.previous_word == "greet" {
+        let mut items = BTreeSet::new();
+        items.insert(SuggestItem::new_with_desc("Alice".into(), "Likes to receive messages".into()));
+        items.insert(SuggestItem::new("World".into()));
+        Suggest::Suggest(items)
+    } else {
+        Suggest::FileCompletion
+    }
+}
+```
+ 
+The `suggest!` macro is a more concise way to write the same thing:
+
+```rust
+// Features: ["comp"]
+@@@use mingling::macros::suggest;
+@@@fn example() {
+suggest! {
+    "Alice": "Likes to receive messages",
+    "World"
+};
+@@@}
+```
+ 
+`ShellContext` holds the user's current input state (`previous_word`, `current_word`, `all_words`, etc.). `Suggest` has two variants: `Suggest::Suggest(list)` returns a suggestion list, `Suggest::FileCompletion` delegates file completion to the shell.
+
+## Generate completion scripts
+
+Call `build_comp_scripts` in `build.rs` to generate completion scripts (requires `builds` + `comp` features).
+
+See [example-completion](https://mingling-rs.github.io/mingling/docs/example-viewer.html?name=example-completion).
+
+<p align="center" style="font-size: 0.85em; color: gray;">
+    Written by @Weicao-CatilGrass
+</p>
diff --git a/docs/pages/advanced/2-structural-renderer.md b/docs/pages/advanced/2-structural-renderer.md
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+<h1 align="center">Structural Rendering</h1>
+<p align="center">
+    Use the <code>structural_renderer</code> feature to render output as serialized text
+</p>
+
+With `structural_renderer` enabled, your program can switch output to a structured format via `--json`, `--yaml`, etc., making it easy to integrate with other tools.
+
+## Enabling the Feature
+
+```toml
+[dependencies.mingling]
+features = ["structural_renderer"]
+```
+ 
+`structural_renderer` automatically enables `json_serde_fmt`.
+
+For more formats, enable `structural_renderer_full` (includes JSON, YAML, TOML, RON).
+
+> [!NOTE]
+> To customize output types, see [Features](./pages/other/features)
+
+## Basic Usage
+
+After enabling `StructuralRendererSetup`, use `pack_structural!` instead of `pack!` to declare types that support structured output:
+
+```rust
+// Features: ["structural_renderer"]
+// Dependencies:
+// serde = "1"
+@@@use mingling::setup::StructuralRendererSetup;
+@@@dispatcher!("render", CMDRender => EntryRender);
+ 
+// pack_structural! is equivalent to pack! + StructuralData
+pack_structural!(ResultInfo = (String, i32));
+ 
+#[chain]
+fn handle_render(args: EntryRender) -> Next {
+    let name = args.inner.first().cloned().unwrap_or_default();
+    let age = args.inner.get(1).and_then(|s| s.parse().ok()).unwrap_or(0);
+    ResultInfo::new((name, age))
+}
+ 
+#[renderer]
+fn render_info(r: ResultInfo) {
+    r_println!("{:?}", *r);
+}
+```
+ 
+Output:
+
+```text
+~# my-cli render Bob 22
+("Bob", 22)
+ 
+~# my-cli render Bob 22 --json
+{"inner":["Bob",22]}
+```
+ 
+When the user passes `--json`, the framework automatically serializes the render result as JSON — no business logic changes needed.
+
+## 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)]`:
+
+```rust
+// Features: ["structural_renderer"]
+// Dependencies:
+// serde = "1"
+@@@use mingling::prelude::*;
+@@@use mingling::setup::StructuralRendererSetup;
+@@@use mingling::StructuralData;
+@@@use serde::Serialize;
+@@@dispatcher!("render", CMDRender => EntryRender);
+ 
+#[derive(Serialize, StructuralData, Groupped)]
+struct Info {
+    name: String,
+    age: i32,
+}
+ 
+#[chain]
+fn handle_render(args: EntryRender) -> Next {
+    let name = args.inner.first().cloned().unwrap_or_default();
+    let age = args.inner.get(1).and_then(|s| s.parse().ok()).unwrap_or(0);
+    Info { name, age }.to_render()
+}
+ 
+#[renderer]
+fn render_info(info: Info) {
+    r_println!("{} is {} years old", info.name, info.age);
+}
+@@@
+@@@fn main() {
+@@@    let mut program = ThisProgram::new();
+@@@    program.with_setup(StructuralRendererSetup);
+@@@    program.with_dispatcher(CMDRender);
+@@@    program.exec();
+@@@}
+@@@gen_program!();
+```
+ 
+Now `--json` outputs:
+
+```json
+{ "name": "Bob", "age": 22 }
+```
+ 
+## Notes
+
+- Supported formats: JSON, YAML, TOML, RON (depends on enabled features)
+- `StructuralRendererSetup` registers global params like `--json`, `--yaml`, `--toml`, `--ron`
+
+> [!NOTE]
+> Each type still needs an **empty Renderer**, otherwise that type **is not considered renderable**
+
+See [example-structural-renderer](https://mingling-rs.github.io/mingling/docs/example-viewer.html?name=example-structural-renderer).
+
+<p align="center" style="font-size: 0.85em; color: gray;">
+    Written by @Weicao-CatilGrass
+</p>