The Intel NPU "Compiler-in-Driver" (CiD) is the MLIR/VPUX compiler that the OpenVINO NPU plugin uses (via the Intel NPU userspace driver libzeintelnpu.so, package intel-level-zero-npu) to lower OpenVINO IR to NPU blobs. As of OpenVINO 2026.2 it is two shared libraries: libopenvinointelnpucompilerloader.so (the thin VCL loader the OpenVINO NPU plugin dlopens) and libopenvinointelnpucompiler.so (the MLIR/VPUX compiler the loader dlopens by base name). Built from source as an OpenVINO extra module against a vendored OpenVINO 2026.2.0 source tree (BUILDSHARED_LIBS=OFF), with the OpenVINO runtime, IR frontend and Intel's LLVM/MLIR fork all statically fused into the compiler libraries (no run dependency on a shared libopenvino). Neither library ships in the conda-forge openvino packages. Co-install with openvino + intel-level-zero-npu (+ NPU firmware system-wide) to run OpenVINO inference on Intel NPU.