diff --git a/src/cleveragents/application/services/acms_service.py b/src/cleveragents/application/services/acms_service.py
index d231fe350..d9903d8b4 100644
--- a/src/cleveragents/application/services/acms_service.py
+++ b/src/cleveragents/application/services/acms_service.py
@@ -361,6 +361,21 @@ class FragmentOrderer(Protocol):
     ) -> Sequence[ContextFragment]: ...
 
 
+# ---------------------------------------------------------------------------
+# Spec-aligned Protocol aliases (spec §44794-44856)
+# ---------------------------------------------------------------------------
+# The specification uses "Protocol" suffix for all pipeline component
+# interfaces (e.g. ``FragmentDeduplicatorProtocol``).  These aliases
+# expose the canonical spec names alongside the shorter runtime names so
+# that code referencing either form works correctly.
+
+FragmentDeduplicatorProtocol = FragmentDeduplicator
+DetailDepthResolverProtocol = DetailDepthResolver
+FragmentScorerProtocol = FragmentScorer
+BudgetPackerProtocol = BudgetPacker
+FragmentOrdererProtocol = FragmentOrderer
+
+
 # ---------------------------------------------------------------------------
 # Phase 3 — Context Finalization protocols (spec §42648-42653)
 # ---------------------------------------------------------------------------
diff --git a/vulture_whitelist.py b/vulture_whitelist.py
index cef933f03..f6bd96090 100644
--- a/vulture_whitelist.py
+++ b/vulture_whitelist.py
@@ -992,6 +992,12 @@ ScoredFragment  # noqa: B018, F821
 score_detailed  # noqa: B018, F821
 depth_fallback_steps  # noqa: B018, F821
 min_fragment_tokens  # noqa: B018, F821
+# Spec-aligned Protocol aliases (spec §44794-44856)
+FragmentDeduplicatorProtocol  # noqa: B018, F821
+DetailDepthResolverProtocol  # noqa: B018, F821
+FragmentScorerProtocol  # noqa: B018, F821
+BudgetPackerProtocol  # noqa: B018, F821
+FragmentOrdererProtocol  # noqa: B018, F821
 
 
 # LSP Server Stub — public API (issue #203)