This looks great! Pulled it down and it solves my problem.

Would love to see this merged.

> How about...
>
> pws
>
> diff --git a/Doc/Zsh/zle.yo b/Doc/Zsh/zle.yo
> index d68365b..b65e3be 100644
> --- a/Doc/Zsh/zle.yo
> +++ b/Doc/Zsh/zle.yo
> @@ -864,6 +864,12 @@ vindex(KEYS)
>  item(tt(KEYS) (scalar))(
>  The keys typed to invoke this widget, as a literal string; read-only.
>  )
> +vindex(KEYS_QUEUED_COUNT)
> +item(tt(KEYS_QUEUED_COUNT) (integer))(
> +The number of bytes pushed back to the input queue and therefore
> +available for reading immediately before any I/O is done; read-only.
> +See also tt(PENDING); the two values are distinct.
> +)
>  vindex(killring)
>  item(tt(killring) (array))(
>  The array of previously killed items, with the most recently killed
first.
> @@ -919,7 +925,8 @@ item(tt(PENDING) (integer))(
>  The number of bytes pending for input, i.e. the number of bytes which
have
>  already been typed and can immediately be read. On systems where the
shell
>  is not able to get this information, this parameter will always have a
> -value of zero.  Read-only.
> +value of zero.  Read-only.  See also tt(KEYS_QUEUED_COUNT); the two
> +values are distinct.
>  )
>  vindex(PREBUFFER)
>  item(tt(PREBUFFER) (scalar))(
> diff --git a/Src/Zle/zle_params.c b/Src/Zle/zle_params.c
> index 1e4c5b8..0a922d2 100644
> --- a/Src/Zle/zle_params.c
> +++ b/Src/Zle/zle_params.c
> @@ -85,6 +85,8 @@ static const struct gsu_integer cursor_gsu =
>  { get_cursor, set_cursor, zleunsetfn };
>  static const struct gsu_integer histno_gsu =
>  { get_histno, set_histno, zleunsetfn };
> +static const struct gsu_integer keys_queued_count_gsu =
> +{ get_keys_queued_count, NULL, zleunsetfn };
>  static const struct gsu_integer mark_gsu =
>  { get_mark, set_mark, zleunsetfn };
>  static const struct gsu_integer numeric_gsu =
> @@ -146,6 +148,8 @@ static struct zleparam {
>      { "HISTNO", PM_INTEGER, GSU(histno_gsu), NULL },
>      { "KEYMAP", PM_SCALAR | PM_READONLY, GSU(keymap_gsu), NULL },
>      { "KEYS", PM_SCALAR | PM_READONLY, GSU(keys_gsu), NULL },
> +    { "KEYS_QUEUED_COUNT", PM_INTEGER | PM_READONLY,
GSU(keys_queued_count_gsu),
> +      NULL},
>      { "killring", PM_ARRAY, GSU(killring_gsu), NULL },
>      { "LASTABORTEDSEARCH", PM_SCALAR | PM_READONLY,
GSU(lastabortedsearch_gsu),
>        NULL },
> @@ -458,6 +462,13 @@ get_keys(UNUSED(Param pm))
>  }
>
>  /**/
> +static zlong
> +get_keys_queued_count(UNUSED(Param pm))
> +{
> +    return kungetct;
> +}
> +
> +/**/
>  static void
>  set_numeric(UNUSED(Param pm), zlong x)
>  {