Adds an O(1) "seen" bitmap so lazily-embedded older nodes get picked up
incrementally instead of only on a full rebuild (embed-gap #20).
Replaces engram_activate's O(N*D) cosine prescan with a lazy-memoized
cosine cache (eg_cosq_at), proven bit-identical to the old path.
Extracts a clean vindex_harvest_from_store primitive (read-only vector
harvest, careful malloc/ownership/error-path handling) reused by both
index-build and the new vindex_bench.c — a read-only proof harness
comparing brute-force vs HNSW recall/latency on both the real store and
synthetic data.
.nsbx-env intentionally excluded — local sandbox config (ports, paths,
dev-only placeholder key), not checked in.
Will waived diff review -> build it for real. Add engram_boundary_beat() to the
runtime (afferent counter++ + engram_chrono_tick + engram_strengthen(self-anchor)
+ dharma_emit) and two act-stats counters (aff_boundary_ops, dharma_emits).
codegen cg_fn injects ONE engram_boundary_beat(op) at the entry of every
@manager/@accessor fn (fn_has_decorator, so it fires under @route @manager too) —
a decorated op self-reports with ZERO hand-written instrumentation. Rebuilt elc
self-host + the cognition engram in the worktree; ran it as the clone daemon on
:8900. Proof (/api/boundary-proof, @manager, empty body, 5x): aff_boundary_ops
0->5, dharma_emits 0->5, self activation_count 1510->1513, chrono stamp advanced.
Brought in feat/cognitive-architecture engram runtime+server for the build.
strengthen = activation bump (not content/edge write) -> identity protection
intact. Live :8742 untouched; no push, no cutover.
bigmerge