Replaces the earlier "RC + inference, no annotations" position
with a two-layer architecture: inference (intra-fn) + mandatory
LLM-author mode annotations on fn signatures (inter-fn). Adds
structured rationale for rejecting region inference (regions
assume stack-shaped lifetimes; real programs need
non-stack-shaped lifetimes for caches / memo tables) and linear
types as primary mechanism.
Schema additions enumerated for the 18-series:
Type::Borrow / Type::Own (Iter 18a)
Term::Clone (Iter 18c)
Term::ReuseAs (Iter 18d)
TypeDef.drop_iterative (Iter 18e)
Migration plan extended from 18a-d (4 iters) to 18a-f (6 iters).
JOURNAL records the regions excursion, the scope-shape reduction,
and the LLM-author lever as the structural advantage Decision 10
cashes in on.
Brummel
e3ecf4f0cd