Package portable Linux runtime and verify Google CPU search

docs/SEMANTIC.md

@@ -44,6 +44,15 @@ external OpenMP runtime. Production CMake supports cpu, auto, metal, vulkan,
 and cuda; CPU builds force GPU flags off. Runtime/provider parity and packaging
 on other operating systems remain independent release checks.
 
+Linux x86-64 normal builds also use shared CPU dispatch: 14 CPU modules,
+four core libraries and a dynamically loaded Vulkan module. Core SONAME files
+are copied beside the worker with origin-relative lookup; the builder verifies
+ELF dependencies and the stager verifies the explicit hashed inventory.
+Vulkan's system loader is a dependency of the optional GPU module rather than
+the worker or CPU/core libraries. Native optimized and baseline-only CPU
+code-query smoke checks pass. System ABI coverage, reference parity, GPU
+operation and desktop packaging are separate release gates.
+
 The normal build/staging default is `auto`, shipping GPU support together with
 CPU fallback: Metal on macOS, Vulkan on Windows/Linux. Runtime detection chooses
 the usable device; users do not need hardware-specific builds. Release builders