The key test in Gaps.md §6 asks what was true last week. It could not be
answered: search_atoms joined v_atoms_current, so a superseded memory is
unreachable no matter what since/until says — those two fields bound when a
memory was true, not which moment the store answers from.
SearchFilters.as_of moves that moment. Without it the words leg repeats the
view's currency predicate verbatim; with it a memory answers when
valid_from <= as_of < valid_to, its event time has arrived, and it is inside
its retention. archived_at is ignored on purpose: archival is a storage tier,
not a claim about the world, so an archived memory still answers for the time
before it was archived. The dense leg reads the same window through
vector_index._allowed, so the two legs cannot disagree about what existed.
scripts/key_test.sh runs the seven §6 scenarios end to end against one live
store — HTTP, the Go MCP binary over stdio, and the CLI mounting cartridges.
Six pass. The seventh, "a cartridge saves compute", is reported NOT MEASURED
rather than passed: it claims time-to-first-token and a cache-hit rate, no
generator has ever run here, and there is no compile or cache route to observe
even the second half.
Gates: pytest -q 406 passed; ruff clean; filesize OK; pyright 0 on the seven
touched files; mypy cold cache Success on the same seven; key test exit 0.
