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+# Some Situations Where You'd Be Like "Shit!"
+
+This document collects the discomforts currently experienced while using Mingling.
+
+Of course, you can also contribute to this document.
+
+---
+
+## Why is there no fallback completion logic?
+
+(completion) (fallback)
+
+Currently, Mingling's Completion only supports providing completion logic for specific subcommands, with no way to provide global completion.
+
+For example:
+
+```
+mycmd <tab>
+completion:
+--help    -h  --- Display helps
+--version -V  --- Display versions
+```
+
+Currently, there is no workaround.
+
+Ideal solution:
+
+```rust
+#[completion(EntryGlobal)]
+fn complete(ctx: &ShellContext) -> Suggest {
+    // ...
+}
+```
+
+---
+
+## Why can't I register descriptions for commands?
+
+(completion) (dispatcher)
+
+Currently, Mingling's Completion cannot register a description for each subcommand.
+
+For example:
+
+```
+mycmd <tab>
+completion:
+add rm list <--- You cannot register descriptions for commands
+```
+
+Expected behavior:
+
+```
+mycmd <tab>
+completion:
+add  --- Add something
+rm   --- Remove something
+list --- List something
+```
+
+Ideal solution:
+
+```rust
+// It should be able to freely integrate with crates that provide i18n functionality,
+// so the following approach cannot be used as a data source for descriptions.
+dispatcher! {
+    /// Add Something <--- How to i18n?
+    "add", CMDAdd => EntryAdd
+}
+
+// Ideally, it should satisfy the following two conditions:
+// 1. No need to use `with_dispatcher`, because `with_dispatcher` is disabled in `dispatch_tree` mode
+// 2. Must be able to accept String or &str at runtime
+
+// Current idea
+#[inline(always)]
+#[dispatcher_desc(EntryAdd)]
+fn desc_add() -> String {
+    // If using rust_i18n
+    t!("cmd.add.desc")
+}
+
+// Collected and generated by `gen_program!()`
+// Generate something like get_dispatcher_desc(id: &ThisProgram) -> String
+// Match the corresponding function using enum values inside ThisProgram
+gen_program!()
+```