Records that the codegen change was a one-line extension because
the 18a bump path had centralised the allocator-symbol decision
on fn_name(). Documents the runtime ABI (8-byte refcount header,
ailang_rc_alloc/inc/dec) and the deliberate no-inc/dec posture:
programs leak intentionally under --alloc=rc; 18c lights up the
actual reference counting.
Next-step plan for 18c is split into three sub-iters
(clone schema / linearity check / inference + codegen) since
each wants its own verification cycle.
Brummel
5cd0a3400a