Add completion hints to maintained commands

integrations/ckprompt/examples/composed/README.md

@@ -40,6 +40,13 @@ shortens the PromptKit group. `--fmt` is scoped to named prompt inspection and
 `--hlep` is available globally. The `smoke` shortcut retains the canonical
 `promptkit test KIND` operand, including the special `all` aggregate.
 
+The example installs `Completion("composed-example")`. Build it as
+`go build -o composed-example .`, then load a shell script as described in the
+[CLI reference](../../../../docs/cli.md#shell-completion). Try completion after
+`composed-example pk show prompt briefing --fmt=` or after the filename prefix
+in `composed-example config show --config=fixtures/`. The already-entered `pk`
+alias selects the PromptKit command context without loading an engine.
+
 The composition calls `ckconfig.Command(suite)` and `ckprompt.Command(definitions)`
 directly in a `[]commandkit.Declaration` with root-installed routing rules.
 Group children remain canonical `Command` values. For command-only slices,