Add --version flag to CLI (#189)

SimonKaran13 · web-flow · commit eb7e2f80d047 · 2025-08-18T11:16:58.000+02:00
Add support for --version (-V) flag to display the current version.
The version is now available on-demand via CLI flag in addition to
being displayed during server startup.

Updates:
- Add version attribute to CLI struct using clap's built-in version support
- Update README.md to document the new --version flag and usage

Resolves the common CLI expectation of having a version flag.
diff --git a/README.md b/README.md
@@ -52,7 +52,8 @@ Commands:
   help   Print this message or the help of the given subcommand(s)
 
 Options:
-  -h, --help  Print help
+  -h, --help     Print help
+  -V, --version  Print version
 ```
 
 ### Using the stdio protocol
diff --git a/src/cli.rs b/src/cli.rs
@@ -24,6 +24,7 @@ use std::path::PathBuf;
 
 /// Elastic MCP server
 #[derive(Debug, Parser)]
+#[command(version)]
 pub struct Cli {
     /// Container mode: change default http address, rewrite localhost to the host's address
     #[clap(global=true, long, env = "CONTAINER_MODE")]
