Protect manual cluster members from auto eviction

desloppify/engine/_plan/auto_cluster.py

@@ -163,13 +163,16 @@ def _evictable_auto_cluster_issue_ids(plan: PlanModel) -> set[str]:
     active_ids: set[str] = set()
     inactive_ids: set[str] = set()
     for cluster in plan.get("clusters", {}).values():
-        if not isinstance(cluster, dict) or not cluster.get("auto"):
+        if not isinstance(cluster, dict):
             continue
         ids = {
             issue_id
             for issue_id in cluster.get("issue_ids", [])
             if isinstance(issue_id, str) and issue_id and not is_synthetic_id(issue_id)
         }
+        if not cluster.get("auto"):
+            active_ids |= ids
+            continue
         if cluster_is_active(cluster):
             active_ids |= ids
         else:

desloppify/tests/plan/test_queue_metadata.py

@@ -229,6 +229,30 @@ def test_cross_cluster_move_not_evicted() -> None:
     assert evicted == {"old_only"}
 
 
+def test_manual_cluster_member_not_evicted_from_inactive_auto_cluster() -> None:
+    from desloppify.engine._plan.auto_cluster import (
+        _evictable_auto_cluster_issue_ids,
+    )
+
+    plan = {
+        "clusters": {
+            "auto/exports": {
+                "auto": True,
+                "issue_ids": ["u1", "u2"],
+                "execution_status": EXECUTION_STATUS_REVIEW,
+                "execution_policy": EXECUTION_POLICY_PLANNED_ONLY,
+            },
+            "manual/my-task": {
+                "auto": False,
+                "issue_ids": ["u1"],
+                "execution_status": EXECUTION_STATUS_ACTIVE,
+            },
+        },
+    }
+    evicted = _evictable_auto_cluster_issue_ids(plan)
+    assert evicted == {"u2"}
+
+
 # ── explain_queue ──────────────────────────────────────────────────