pub const DECODE_RING_FIT_LADDER: [usize; 5];Expand description
Depths preflight’s #915 auto-fit may choose from, LARGEST FIRST.
Halving rather than decrementing: each rung halves the ring’s share of
the reserve, so at most four steps separate “the default” from “no ring”,
and every rung is a power of two — the ring’s slot assignment is
(next_slot + 1) % capacity (SsmDecodeRing::record), which is exact at
any capacity but wraps most evenly at these.
8 is atlas_kernels::DECODE_ROLLBACK_RING_SLOTS and covers the
3-repeat fuzzy loop detector with margin; 1 still anchors a single clean
boundary; 0 means the sequence hard-stops instead of re-steering
(RollbackFallback::NoSsmSnapshot — an honest decline, never a partial
rewind).