A seed agent is not frozen at birth. It carries five facts about itself from session start, it guards every change to its own machinery behind a single OR-gate, and it matures over time — its brain getting leaner and more deterministic as proven patterns migrate into hooks. This deck walks that whole story: the five identity facts, the customization guardrail and the propose-and-confirm flow that gate plugin work, the five customization layers that say where a change belongs, the young-to-mature brain model, the cost ladder a single control climbs, and the operator's own Apprentice → Journeyman → Architect arc running in parallel. Each card is one focused idea, with a clean diagram you can hover and click.
The triangle collapses to two: a non-developer operator becomes the architect of their own seed — without ever writing the machinery.