This document provides a status update on the implementation of ARB_gl_spirv support on Mesa. Key points include: - The NIR linker required for ARB_gl_spirv is taking longer than expected to implement due to differences from the existing GLSL linker and requirements to support Vulkan-style linking without names. - Extensive testing is being done using the Piglit test suite, which has been updated to generate SPIR-V versions of OpenGL tests. Over 30,000 tests are now supported. - The current Mesa master has initial support for uniforms, atomic counters, transform feedback, and other features. A series of patches adding UBO/SSBO support was recently submitted