The time-travel recall row moves from envelope-note to contracted: vector
search at a pinned past generation serves the vectors AS THEY STOOD —
a later re-embed never leaks into an earlier pin (byte-exact), tombstones
mask, the deferred-embed pin serves the stub on the vector leg until the
landing generation (text/metadata legs unaffected — triple intelligence by
design), and beyond-head pins refuse typed. Brainy-alone leg = the
documented ephemeral at-generation materialization; the at-scale leg rides
the accelerated provider's as-of index. Registry row added (shared ID
pending the master table).
