diff --git a/docs/dev/architecture.md b/docs/dev/architecture.md
index 847bbfb23..f20358e37 100644
--- a/docs/dev/architecture.md
+++ b/docs/dev/architecture.md
@@ -167,7 +167,7 @@ Phase skipping (from token profile) gates steps 2-3: if a phase is skipped, the
 | `memory-store.ts` | Persistent memory store for cross-session knowledge; query-aware ranking |
 | `memory-embeddings.ts` | Vector storage + cosine ranking + agent_end backfill driver |
 | `memory-embeddings-llm-gateway.ts` | OpenAI-shaped /v1/embeddings + /v1/rerank adapter for the inference-fabric llm-gateway (env-driven; opt-in via `SF_LLM_GATEWAY_KEY`) |
-| `memory-relations.ts` | Knowledge-graph edges between memories (typed relations). Storage + import/export wired; no ranker consumer yet — the ranking pipeline currently uses cosine + static score, not graph traversal. |
+| `memory-relations.ts` | Knowledge-graph edges between memories (typed relations: `related_to`, `depends_on`, `contradicts`, `elaborates`, `supersedes`). Memory-extraction batches auto-link co-extracted memories with `related_to` (confidence 0.5). `getRelevantMemoriesRanked` walks the cosine top-N's edges and applies a one-pass score boost (intra-pool, damping=0.4) so cohort memories surface together. |
 | `memory-source-store.ts` | Raw source rows preserved separately from extracted memories (idempotent re-extraction) |
 | `queue-order.ts` | Milestone queue ordering |
 | `context-masker.ts` | Context masking for model routing optimization |