diff --git a/.console/log.md b/.console/log.md
index 2f9f02561..84a2b9755 100644
--- a/.console/log.md
+++ b/.console/log.md
@@ -1,3 +1,12 @@
+## 2026-06-13 — fix(spec-hygiene): active.json projects only active campaigns (campaign GC)
+
+_rebuild_active_projection wrote every campaign — incl. complete/cancelled — to state/campaigns/
+active.json, which OperatorConsole's campaign pane reads. Terminal campaigns are history (their
+record lives in Plane) but accumulated forever in the projection (observed: 11 records, 10 terminal,
+0 truly active — cluttering the pane). Fix: skip non-active campaigns when rebuilding the projection.
++1 test. (A one-time prune of active.json doesn't stick — it's rebuilt each spec-hygiene cycle — so
+the projection filter IS the durable prune.)
+
 ## 2026-06-13 — fix(reviewer): gate merge on the full required-check set (guard D)
 
 #272 + Guard C close "merge on red/incomplete/no-checks CI", but a hole remained: a required check
diff --git a/src/operations_center/entrypoints/spec_hygiene/main.py b/src/operations_center/entrypoints/spec_hygiene/main.py
index 50e2e870a..2f86f5e10 100644
--- a/src/operations_center/entrypoints/spec_hygiene/main.py
+++ b/src/operations_center/entrypoints/spec_hygiene/main.py
@@ -147,6 +147,14 @@ def _rebuild_active_projection(
         else:
             status = "active"
 
+        # active.json is the ACTIVE projection (OperatorConsole's campaign pane
+        # reads it). Terminal campaigns (complete/cancelled) are history — their
+        # record lives in Plane — so they are not projected here. Without this the
+        # projection accumulates every finished campaign indefinitely, cluttering
+        # the status pane (observed: 11 records, 10 terminal, only 0 truly active).
+        if status != "active":
+            continue
+
         # Pull slug + spec_file + created_at from the parent issue when we can.
         parent = next(
             (i for i in issues if str(i.get("name", "")).startswith("[Campaign]")),
diff --git a/tests/maintenance/test_spec_hygiene_task.py b/tests/maintenance/test_spec_hygiene_task.py
index 1082661a7..f2c1556c8 100644
--- a/tests/maintenance/test_spec_hygiene_task.py
+++ b/tests/maintenance/test_spec_hygiene_task.py
@@ -98,3 +98,31 @@ def _boom(settings, client):  # noqa: ARG001
     result = task.run_once(MaintenanceContext(cycle_id="c", now=datetime.now(timezone.utc)))
     assert result.status == "failed"
     assert result.error == "plane down"
+
+
+def test_rebuild_active_projection_excludes_terminal(tmp_path):
+    """active.json projects only active campaigns; terminal ones (complete/cancelled)
+    are history (in Plane) and must not accumulate in the pane projection."""
+    from operations_center.spec_author.state import CampaignStateManager
+
+    mgr = CampaignStateManager(state_path=tmp_path / "active.json")
+
+    def issue(cid: str, state: str) -> dict:
+        return {
+            "name": f"[Campaign] {cid}",
+            "labels": [{"name": "source: spec-campaign"}, {"name": f"campaign-id: {cid}"}],
+            "state": {"name": state},
+        }
+
+    spec_hygiene_main._rebuild_active_projection(
+        mgr,
+        [
+            issue("active1", "in progress"),  # → active
+            issue("cancelled1", "cancelled"),  # → cancelled (excluded)
+            issue("done1", "done"),  # → complete (excluded)
+        ],
+    )
+
+    saved = mgr.load()
+    assert [c.slug for c in saved.campaigns] == ["active1"]
+    assert all(c.status == "active" for c in saved.campaigns)