Query prepared plan

Good morning,

May I know the "commands" to
. show current session's prepared plans
. see the definition of a prepared plan

E.g., psql> PREPARE fooplan (int, text, bool, numeric) AS INSERT INTO
foo VALUES($1, $2, $3, $4);

(1) Similar to "\dt", I want to see "fooplan"
(2) Similar to "\d tableName", how to see the plan def?

Thanks a lot!