diff --git a/configs/cpu-fast.yaml b/configs/cpu-fast.yaml
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+# Urgent CPU-only lane: fp32, birefnet segmentation, NO cross-check, NO anime-seg.
+#
+# This is the lightest production path: base ViTMatte + one BiRefNet@1024, ~14-15s
+# per 1.5 MP image on CPU. It needs ONLY these two weights provisioned --
+# BiRefNet_HR-matting (cross-check) and anime-seg are never loaded.
+#
+# Anything omitted here inherits the built-in defaults (identical to default.yaml).
+
+model:
+  device: cpu
+  precision: fp32          # fp32 only: this lane targets non-bf16 CPUs
+
+segmentation:
+  enabled: true
+  backend: birefnet        # the only backend this lane uses
+  device: cpu
+  precision: fp32
+
+cross_check:
+  enabled: false           # no second-opinion HR-matting pass (the big cost/mem sink)