framework:
    cache:
        app: cache.adapter.filesystem

        pools:
            # Backs App\Session\BffSessionStore. Filesystem is fine for a
            # single instance under low/moderate traffic — safe across
            # concurrent PHP-FPM workers, no extra service to run.
            #
            # If you ever scale to multiple BFF instances/containers,
            # switch adapter to cache.adapter.redis and add:
            #   provider: '%env(REDIS_DSN)%'
            # No code changes needed elsewhere.
            bff.session_cache:
                adapter: cache.adapter.filesystem
                default_lifetime: 3600