diff --git a/docs/design/oura-import.md b/docs/design/oura-import.md
index 3591f1779..62ae074a9 100644
--- a/docs/design/oura-import.md
+++ b/docs/design/oura-import.md
@@ -220,7 +220,7 @@ Removing `email` and `personal` changes only what future authorization requests
 
 Landed in the skeleton:
 
-- `SENSITIVE_IMPORTERS` is derived from `HEALTH_IMPORTER_REGISTRY` in `health_schema.py` so health importer registration and gate coverage cannot drift.
+- `SENSITIVE_IMPORTERS` is an explicit importer/backend-name gate set: `{"apple_health", "oura"}`. It intentionally does not derive from source-family registries because `oura_api` and `dexcom_clarity` are source families, not approval-artifact importer names.
 - Same approval artifact (`imports/_approvals/health_import_preflight.json`, same `APPROVAL_SCHEMA`/`CHECKLIST_VERSION`): `approved_importers` must include `"oura"`; all five replication-destination decisions and the raw-retention decision apply unchanged to Oura data.
 - Same per-run `--confirm-health-save` requirement; `OuraImporter.process()` enforces the gate itself in save mode (defense in depth alongside the CLI's pre-`process` enforcement), **before** any parse or write, then stops at the phase-O1 seam.
 - Tests prove: missing artifact blocks; artifact without `"oura"` in `approved_importers` blocks (`importer_not_approved`); missing per-run confirmation blocks; a fully approved run still writes nothing (seam); failure payloads leak no fixture paths or values.
diff --git a/solstone/think/importers/health_schema.py b/solstone/think/importers/health_schema.py
index 3b9ced19d..a3920b408 100644
--- a/solstone/think/importers/health_schema.py
+++ b/solstone/think/importers/health_schema.py
@@ -35,6 +35,7 @@ HEALTH_CARD_STREAMS: Final = frozenset(
     stream for stream in HEALTH_CARD_STREAM_BY_FAMILY.values() if stream is not None
 )
 
+
 class HealthCardStreamError(ValueError):
     """Raised when a health source family cannot write a chronicle card stream."""
 
diff --git a/solstone/think/importers/pre_save_gate.py b/solstone/think/importers/pre_save_gate.py
index 9a4e03a57..0da402b36 100644
--- a/solstone/think/importers/pre_save_gate.py
+++ b/solstone/think/importers/pre_save_gate.py
@@ -48,10 +48,9 @@ import json
 from dataclasses import dataclass
 from enum import StrEnum
 from pathlib import Path
-from typing import Any
+from typing import Any, Final
 
 from solstone.think.importers.health_schema import (
-    HEALTH_IMPORTER_REGISTRY,
     SOURCE_APPLE_HEALTH,
     SOURCE_OURA,
 )
@@ -75,7 +74,10 @@ CHECKLIST_DESTINATIONS = (
     "other",
 )
 DESTINATION_DECISIONS = {"approved", "excluded"}
-SENSITIVE_IMPORTERS = frozenset(HEALTH_IMPORTER_REGISTRY)
+# Approval artifacts are keyed by importer/backend names, not source families.
+# Do not derive this from KNOWN_SOURCE_FAMILIES: oura_api and dexcom_clarity
+# are source families with no approval-artifact importer name.
+SENSITIVE_IMPORTERS: Final = frozenset({"apple_health", "oura"})
 
 
 class RawRetentionDecision(StrEnum):
diff --git a/tests/test_cluster.py b/tests/test_cluster.py
index d3c9d5e30..68f1bd18d 100644
--- a/tests/test_cluster.py
+++ b/tests/test_cluster.py
@@ -1427,34 +1427,6 @@ def test_scan_day_marks_markdown_only_health_segment_as_markdown(tmp_path, monke
     ) == {"markdown": "analyzed"}
 
 
-def test_health_registry_keys_match_sensitive_importers():
-    from solstone.think.importers.health_schema import HEALTH_IMPORTER_REGISTRY
-    from solstone.think.importers.pre_save_gate import SENSITIVE_IMPORTERS
-
-    assert set(HEALTH_IMPORTER_REGISTRY) == set(SENSITIVE_IMPORTERS)
-
-
-def test_registry_day_summary_streams_are_health_card_streams(tmp_path, monkeypatch):
-    monkeypatch.setenv("SOLSTONE_JOURNAL", str(tmp_path))
-    mod = importlib.import_module("solstone.think.cluster")
-
-    from solstone.think.importers.health_schema import HEALTH_IMPORTER_REGISTRY
-
-    for entry in HEALTH_IMPORTER_REGISTRY.values():
-        segment = (
-            tmp_path
-            / "chronicle"
-            / "20240101"
-            / entry.day_summary_stream
-            / "090000_300"
-        )
-        segment.mkdir(parents=True)
-        (segment / "day_summary_transcript.md").write_text("health summary\n")
-
-        assert entry.day_summary_stream in mod.HEALTH_CARD_STREAMS
-        assert mod._is_markdown_only_health_segment(entry.day_summary_stream, segment)
-
-
 @pytest.mark.parametrize(
     "stream",
     ["import.kindle", "import.ics", "import.obsidian", "import.document"],
diff --git a/tests/test_importer_presave_gate.py b/tests/test_importer_presave_gate.py
index db2ef8369..fe138b7cd 100644
--- a/tests/test_importer_presave_gate.py
+++ b/tests/test_importer_presave_gate.py
@@ -13,12 +13,17 @@ from pathlib import Path
 import pytest
 
 from solstone.think.importers.file_importer import ImportResult
+from solstone.think.importers.health_schema import (
+    SOURCE_DEXCOM_CLARITY,
+    SOURCE_OURA_API,
+)
 from solstone.think.importers.pre_save_gate import (
     APPROVAL_SCHEMA,
     CHECKLIST_DESTINATIONS,
     CHECKLIST_VERSION,
     OURA_SYNC_APPROVAL_SCHEMA,
     OURA_SYNC_CHECKLIST_VERSION,
+    SENSITIVE_IMPORTERS,
     PreSaveGateError,
     RawRetentionDecision,
     approval_path_for_journal,
@@ -162,6 +167,12 @@ def _run_gate_then_save(
     return process()
 
 
+def test_sensitive_importers_are_importer_names_not_source_families():
+    assert SENSITIVE_IMPORTERS == frozenset({"apple_health", "oura"})
+    assert SOURCE_OURA_API not in SENSITIVE_IMPORTERS
+    assert SOURCE_DEXCOM_CLARITY not in SENSITIVE_IMPORTERS
+
+
 def test_apple_health_save_missing_artifact_blocks_before_setup(
     tmp_path: Path, monkeypatch: pytest.MonkeyPatch
 ):