diff --git a/loopx/status.py b/loopx/status.py
index fb021fdcd8..d0a671d727 100644
--- a/loopx/status.py
+++ b/loopx/status.py
@@ -9,6 +9,12 @@
     StatusCollectionContext,
     collect_status as _collect_status_read_model,
 )
+# Refs #4447: one definition for this vocabulary. The control_plane projection
+# owns it because it feeds the attention-queue read model; this module keeps
+# re-exporting the name for existing callers.
+from .control_plane.status.registry_health_projection import (
+    SOURCE_REGISTRY_SHADOW_FINDINGS,
+)
 from .control_plane.status.runtime_summaries import (
     StatusRuntimeSummaryContext,
     build_status_runtime_summaries as _build_status_runtime_summaries_read_model,
@@ -286,10 +292,6 @@
 CONNECTED_DELIVERY_ADAPTER_STATUSES = {
     "connected-delivery",
 }
-SOURCE_REGISTRY_SHADOW_FINDINGS = {
-    "source_registry_missing",
-    "stale_source_registry",
-}
 PLANNED_CONTROLLER_OPT_IN_RECOMMENDED_ACTION = (
     "先在 LoopX 完成 operator 判断；同意后项目 Agent 只执行 read-only map dry-run"
 )
diff --git a/tests/control_plane/test_source_registry_shadow_findings.py b/tests/control_plane/test_source_registry_shadow_findings.py
new file mode 100644
index 0000000000..53988618ea
--- /dev/null
+++ b/tests/control_plane/test_source_registry_shadow_findings.py
@@ -0,0 +1,42 @@
+"""Refs #4447 (Track A): one definition for the source-registry shadow vocabulary.
+
+`SOURCE_REGISTRY_SHADOW_FINDINGS` used to be defined in two active modules with
+identical values, feeding the same `source_registry_shadow_findings` parameter of
+the attention-queue read model. Classifying that fork as `same_semantics` made it
+merge work: the control_plane projection now owns the only definition and
+`loopx.status` re-exports it, so the two copies can no longer drift apart.
+
+`loopx.status` keeps re-exporting the name because
+`examples/control_plane/attention-queue-readmodel-smoke.py` reads it as
+`status_module.SOURCE_REGISTRY_SHADOW_FINDINGS`.
+"""
+
+from __future__ import annotations
+
+import inspect
+
+from loopx import status
+from loopx.control_plane.status import registry_health_projection
+
+EXPECTED_FINDINGS = {"source_registry_missing", "stale_source_registry"}
+
+
+def test_vocabulary_is_unchanged() -> None:
+    """Merging the fork must not change the admitted values."""
+    assert (
+        set(registry_health_projection.SOURCE_REGISTRY_SHADOW_FINDINGS)
+        == EXPECTED_FINDINGS
+    )
+
+
+def test_status_shares_the_single_definition() -> None:
+    """`loopx.status` re-exports the projection's set instead of owning a copy."""
+    assert (
+        status.SOURCE_REGISTRY_SHADOW_FINDINGS
+        is registry_health_projection.SOURCE_REGISTRY_SHADOW_FINDINGS
+    )
+
+
+def test_status_defines_no_second_copy() -> None:
+    """A literal reintroduced into `loopx.status` would fork the vocabulary again."""
+    assert "stale_source_registry" not in inspect.getsource(status)