fix(jupyter): allow unstable flags (#25483)

Closes #25463

cli/args/flags.rs

@@ -2461,7 +2461,7 @@ fn json_reference_subcommand() -> Command {
 }
 
 fn jupyter_subcommand() -> Command {
-  Command::new("jupyter")
+  command("jupyter", "Deno kernel for Jupyter notebooks", UnstableArgsConfig::ResolutionAndRuntime)
     .arg(
       Arg::new("install")
         .long("install")
@@ -2484,7 +2484,6 @@ fn jupyter_subcommand() -> Command {
         .value_parser(value_parser!(String))
         .value_hint(ValueHint::FilePath)
         .conflicts_with("install"))
-    .about("Deno kernel for Jupyter notebooks")
 }
 
 fn uninstall_subcommand() -> Command {
@@ -4584,6 +4583,8 @@ fn json_reference_parse(
 }
 
 fn jupyter_parse(flags: &mut Flags, matches: &mut ArgMatches) {
+  unstable_args_parse(flags, matches, UnstableArgsConfig::ResolutionAndRuntime);
+
   let conn_file = matches.remove_one::<String>("conn");
   let kernel = matches.get_flag("kernel");
   let install = matches.get_flag("install");
@@ -10746,6 +10747,35 @@ mod tests {
       .contains("Note: Permission flags can only be used in a global setting"));
   }
 
+  #[test]
+  fn jupyter_unstable_flags() {
+    let r = flags_from_vec(svec![
+      "deno",
+      "jupyter",
+      "--unstable-ffi",
+      "--unstable-bare-node-builtins",
+      "--unstable-worker-options"
+    ]);
+
+    assert_eq!(
+      r.unwrap(),
+      Flags {
+        subcommand: DenoSubcommand::Jupyter(JupyterFlags {
+          install: false,
+          kernel: false,
+          conn_file: None,
+        }),
+        unstable_config: UnstableConfig {
+          legacy_flag_enabled: false,
+          bare_node_builtins: true,
+          sloppy_imports: false,
+          features: svec!["ffi", "worker-options"],
+        },
+        ..Flags::default()
+      }
+    );
+  }
+
   #[test]
   fn escape_and_split_commas_test() {
     assert_eq!(escape_and_split_commas("foo".to_string()).unwrap(), ["foo"]);