Run Later

Run Later defers one-shot work to a future time while keeping it visible in the Desk.

Two mechanisms

Path	Storage	Desk visibility
enqueue_for_later()	Redis hash keys	No DocType row until poller fires
BTU Run Later DocType	SQL	Full DocType lifecycle

Both are processed by poll_for_ready_work() — not by Frappe's built-in scheduler or raw RQ delay.

Why not RQ enqueue_at?

RQ delayed jobs are invisible in the Desk, lack BTU logging/email guarantees, and bypass Task Log conventions. BTU Run Later trades a few minutes of latency (poller interval) for observability.

See Desk → BTU Run Later and the Set up Run Later poller recipe.

Maintainer rationale: ADR-0004.