- AGENTS.md: state the import-cost exception to the imports-at-top rule,
listing which stacks stay off which import paths and pointing at the
ratchet test that enforces it.
- New docs page "Imports & startup time" (Advanced): what loads when, the
one-time first-use costs, and a tested prewarm recipe for hosts that want
the deferred work paid at startup.
- Migration guide: the lazy import graph, the incidental namespace bindings
that moved to their defining modules, and defer_build inheritance for user
subclasses of SDK models.
- What's new: one paragraph on imports paying only for what they use.
Max Isbey