Merge commit '36c66dd290d3ce6eb1ccd310d0c658d4a32bb8eb' as 'repos/effect'

repos/effect/.changeset/add-command-hidden.md

@@ -0,0 +1,19 @@
+---
+"effect": patch
+---
+
+Add `Command.withHidden` to hide subcommands from `--help` output, shell completions, and "did you mean?" suggestions, while keeping them fully invocable by exact name.
+
+Useful for experimental or internal subcommands that should be accepted but not advertised on the public CLI surface.
+
+```ts
+import { Command } from "effect/unstable/cli"
+
+const experimental = Command.make("experimental").pipe(
+  Command.withHidden
+)
+
+const root = Command.make("mycli").pipe(
+  Command.withSubcommands([experimental])
+)
+```