The co-activation accrual already works (hebb is an EWMA over co-firing); what
was missing is the promotion layer from design §9 that turns accrual into
durable structure. This adds it on top, entirely behind ENGRAM_CONSOLIDATION so
the OFF path is byte-identical to trunk.
CONNECTION threshold ("connection IS consolidation"): when a strongly-firing
InternalStateEvent is created (salience >= ENGRAM_CONSOL_CONN_MIN, default 0.6),
wire hebbian-associate edges from it to the top-K working-memory nodes active at
that instant (ENGRAM_CONSOL_WM_TOPK, default 5), provenance-tagged
"consolidated-from-ISE" and dedup-guarded. A sub-threshold ISE forms nothing (a
shower thought) and drifts out at the existing 48h prune.
PERMANENCE threshold (rare): engram_consolidate_permanence(node) marks a node
whose rehearsed ACT-R base-level clears ENGRAM_CONSOL_PERM_MIN durable via a
reversible metadata marker; engram_prune_telemetry then exempts it (gated, so no
trunk node is ever affected). Idempotent, no double-promote.
Thresholds are env-tunable for A/B without a rebuild.
MEASURED on a copy (throwaway HOME):
- Headline accrual curve (flag OFF, pure trunk) over N co-activations of a wired
pair — hebb_max: N=1 -> 1e-4 (=ETA), N=100 -> 0.010, N=1625 -> 0.150
(LINK_MIN, where an unwired pair consolidates), N=3000 -> 0.259; tracks the
analytic EWMA 1-0.9999^N within measurement noise (co-activation P~1).
- Strong ISE wired 2 edges to exactly the wm_top nodes (hebb-a, hebb-b); weak
ISE formed 0; edges carry the reversible provenance marker.
- Promoted node survived the 48h prune (2->1 nodes); ephemeral ISE swept.
- Flag OFF: ISE creation added 0 edges, permanence returned 0 (no-op).
ASan+UBSan clean.
will.anderson
5f6ce5ca1f