fix: avoid reextracting superseded raw items

src/contextseek/evolution/engine.py

@@ -238,6 +238,7 @@ def record_hop(
             if it.stage == Stage.raw
             and not it.is_deleted
             and it.is_valid_at()
+            and not it.superseded_by
             and self._eligible_for_extraction(it)
         ]
         extract_succeeded = 0

tests/unit_tests/test_evolution.py

@@ -426,6 +426,26 @@ def test_repeated_evolve_does_not_re_merge(self):
             report2.conversion.get("extracted->knowledge", {}).get("attempted", 0) == 0
         )
 
+    def test_repeated_evolve_does_not_reextract_superseded_raw(self):
+        engine = EvolutionEngine()
+        raw = _make_item(
+            content="a write-once operational note worth extracting into a summary",
+            stage=Stage.raw,
+            access_count=5,
+        )
+
+        new1, _, _ = engine.evolve([raw])
+        extracted1 = [it for it in new1 if it.stage == Stage.extracted]
+        assert len(extracted1) == 1
+        assert raw.superseded_by == extracted1[0].id
+
+        # Simulate the next compact over the persisted source and its child.
+        new2, _, report2 = engine.evolve([raw, *new1])
+        extracted2 = [it for it in new2 if it.stage == Stage.extracted]
+
+        assert extracted2 == []
+        assert report2.conversion.get("raw->extracted", {}).get("attempted", 0) == 0
+
     def test_distill_inherits_lineage_signals(self):
         distiller = SkillDistiller(min_use_count=5, min_relevance_boost=1.0)
         item = _make_item(