diff --git a/stacks/comfyui/compose.yaml b/stacks/comfyui/compose.yaml
index e67e93a..f7a04ed 100644
--- a/stacks/comfyui/compose.yaml
+++ b/stacks/comfyui/compose.yaml
@@ -36,6 +36,17 @@ services:
       - BASE_DIRECTORY=/basedir
       - SECURITY_LEVEL=${COMFYUI_SECURITY_LEVEL:-normal}
       - USE_UV=true
+      # Extra ComfyUI launch flags (image appends these to main.py, then adds
+      # --base-directory + --enable-manager itself):
+      #  --disable-cuda-malloc — use PyTorch's native allocator instead of the
+      #    default cudaMallocAsync, which phantom-OOMs ("allocation would exceed
+      #    allowed memory", 0 B allocated) when the A6000 is shared with the
+      #    pinned TTS services (chatterbox-fast / csm-expressiva, ~22 GB).
+      #  --fp8_e4m3fn-text-enc — load the FLUX.2 Qwen3-8B text encoder as fp8
+      #    (~8.7 GB) instead of upcasting the fp8 file to fp16 (~16 GB). Matches
+      #    the box's Ampere-fp8 posture; the encoder runs once per gen so the
+      #    upcast-on-compute cost is negligible.
+      - COMFY_CMDLINE_EXTRA=--disable-cuda-malloc --fp8_e4m3fn-text-enc
     volumes:
       - ${COMFYUI_BASEDIR}:/basedir
       - ${COMFYUI_RUNDIR}:/comfy/mnt