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5afd1746a8
The headliner neuro-mechanism: when a salient FAILURE lands (bug/crash/
regression — the "aversive event"), reach BACKWARD in time and promote the
quiet earlier memory that caused it — the one a vector search structurally
cannot surface because it isn't *similar* to the failure, only causally upstream.
Faithful port of Zaki/Cai et al. 2024, Nature 637:145-155 ("Offline ensemble
co-reactivation links memories across days"), causally proven (hippocampal
silencing abolishes the linking). Ported faithfully:
- backward-only asymmetry (fear links retrospectively, never prospectively) —
also exactly correct for software: a root cause is always upstream in time.
- linking flows along the shared-entity overlap (same file/env-var/service),
NOT semantic similarity — that's the whole point (RAG already covers similarity).
- scoped to failure->backward-causal-backfill, not "all salience flows backward"
(mirrors the Cai aversive->neutral paradigm; honest about scope).
Trigger: auto-detect (high prediction-error + failure markers) OR manual override.
Promotion: boosts FSRS stability so the cause stops decaying and surfaces next time.
Receipt (4/4 tests): backfill_surfaces_the_cause_rag_misses proves it promotes a
sim=0.11 env-var note over a sim=0.82 distractor by the shared API_TIMEOUT entity;
backward-only (future memory never promoted); no shared entity => no fabricated
cause; non-salient doesn't fire; manual override works. clippy clean; 522 core
tests pass (no regressions).
Wires into existing primitives: prediction_error gate (salience), dreams/
consolidation (offline window), memory/strength (promotion). MCP tool + live
demo next.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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