A 512×512 ONNX re-export of ZhengPeng7/BiRefNetlite that actually runs in a browser — solving the OOM wall that blocks every 1024×1024 variant from loading in onnxruntime-web. Drop it in with @huggingface/transformers to get high-quality alpha mattes entirely client-side, with no server round-trip. Used in production by Repper for per-motif matte refinement during foreground extraction. The 1024×1024 ONNX variants — including onnx-community/BiRefNetlite-ONNX — fail in every browser backend we tested: Root cause: BiRefNetlite's decoder produces very large intermediate tensors at 1024×1024 (multi-scale feature maps with 1024-way concatenations). The onnxruntime-web WASM heap is hardcoded at…