PHASE 3 — relational tier (Mem0g-light)

app/core/memory_extraction.py

@@ -366,7 +366,7 @@ async def _apply_candidate(
     if candidate.target_tier == "relational":
         # Always upsert relations — decide_action skipped (no neighbour search).
         if candidate.subject and candidate.predicate and candidate.object:
-            await _upsert_relation_stub(
+            await _upsert_relation(
                 middleware, db, user_id, candidate, trace_id
             )
         return
@@ -396,35 +396,29 @@ def _content_to_key(content: str) -> str:
     return slug or "memory"
 
 
-async def _upsert_relation_stub(
+async def _upsert_relation(
     middleware: Any,
     db: AsyncSession,
     user_id: str,
     candidate: MemoryCandidate,
     trace_id: str | None,
 ) -> None:
-    """Stub: upsert_relation will be fully wired in Phase 3.
-
-    Called here so Phase 2 extraction pipeline already routes relation candidates
-    correctly. Phase 3 replaces this with MemoryMiddleware.upsert_relation().
-    """
-    if hasattr(middleware, "upsert_relation"):
-        await middleware.upsert_relation(
-            user_id=user_id,
-            subject=candidate.subject,
-            subject_type="unknown",
-            predicate=candidate.predicate,
-            object_=candidate.object,
-            object_type="unknown",
-            confidence=candidate.confidence,
-        )
-    else:
-        logger.info(
-            "memory_extraction: relation stub (Phase 3 not yet wired) subject=%s predicate=%s object=%s",
-            candidate.subject,
-            candidate.predicate,
-            candidate.object,
-        )
+    """Upsert a relation row via MemoryMiddleware.upsert_relation (Phase 3)."""
+    await middleware.upsert_relation(
+        user_id=user_id,
+        subject=candidate.subject or "unknown",
+        subject_type="unknown",
+        predicate=candidate.predicate or "related_to",
+        object_=candidate.object or "unknown",
+        object_type="unknown",
+        confidence=candidate.confidence,
+    )
+    logger.info(
+        "memory_extraction: upserted relation subject=%s predicate=%s object=%s",
+        candidate.subject,
+        candidate.predicate,
+        candidate.object,
+    )
 
 
 async def _store_proactive_stub(