Attribute Macro app 

#[app]

Attach protocol-neutral application metadata to an impl block.

#[app] is consumed by all protocol macros on the same impl block (#[server], #[cli], #[http], #[program], etc.). It does not generate code itself — it passes metadata downstream via an internal #[__app_meta] helper attribute that the consuming macro removes.

Fields

Field	Default	Effect
name	inferred from struct name (kebab-case)	App name used in config file path, CLI header, spec titles
description	none	Human-readable description for CLI --help, OpenAPI info, etc.
version	env!("CARGO_PKG_VERSION")	Version string; powers --version; false disables version entirely
homepage	none	URL used in OpenAPI info.contact.url, OpenRPC info, etc.

Example

#[app(
    name = "myapp",
    description = "Does the thing",
    version = "2.1.0",
    homepage = "https://myapp.example.com",
)]
#[server]
impl MyApi {
    fn list_items(&self) -> Vec<Item> { ... }
}

All preset macros also accept these fields inline as a shorthand:

#[server(name = "myapp", description = "Does the thing")]
impl MyApi { ... }