enhance-lifecycle-email — Emails that arrive because something happened

Degree of freedom: MIXED. Sequence content and cadence [HIGH freedom]; trigger-before-timer rule, exit conditions, consent, idempotent sends, and event names [LOW freedom — run exactly].

Apply-now. Behavior-triggered sends are the primary path; timers are the fallback for users who produce no signal. Every email is gated on a product event, exits the moment the user does the thing, and reports its own open/click/conversion. Templates come from design-email; inbox placement from enhance-email-deliverability.

This skill vs neighbors