- Set FAISS_OPT_LEVEL to "sve" for ARM64 architecture - Disable x86-specific SIMD instructions (AVX2, AVX512, SSE4.1) - Use ARM64-native SVE optimization as per Faiss conda build scripts - Add architecture detection and proper configuration messages Fixes compilation error: "xmmintrin.h: No such file or directory" on ubuntu-24.04-arm runners. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>