diff --git a/backend/app/main.py b/backend/app/main.py
index 6cad461..e184acb 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -77,6 +77,7 @@ def create_app() -> FastAPI:
     _capabilities = [
         "claims",             # /api/v5/claims
         "structured_tasks",   # task objects with intent_hint/blocked_by/status
+        "task_ids",           # structured task ids + claim.task_id support
         "checkpoint_notes",   # /api/v5/checkpoint/{id}/notes
         "branch_disposition", # PATCH /api/v5/lineage/branches/disposition
         "freshness",          # since_commit_id on state endpoint
diff --git a/backend/tests/integration/test_health.py b/backend/tests/integration/test_health.py
index 4d3885a..fcafb4c 100644
--- a/backend/tests/integration/test_health.py
+++ b/backend/tests/integration/test_health.py
@@ -29,6 +29,7 @@ def test_health_includes_required_capabilities(client):
     required = [
         "claims",
         "structured_tasks",
+        "task_ids",
         "checkpoint_notes",
         "branch_disposition",
         "freshness",