Awake Shader Compiler

Runtime WGSL→SPIR-V for Awake: naga — the same translation library the build pipeline's naga-cli wraps — compiled as a native library and bridged into KMP. The on-device tier of the ASL plan; build-time committed .spv stays the default for everything shipped.

val spirv: ByteArray = NagaShaderCompiler.wgslToSpirv(wgslText)   // all entry points
val error: String? = NagaShaderCompiler.validate(wgslText)        // null when clean

Target	Binding	Native build task
desktop JVM	JNI (Rust jni crate, no C glue)	buildNagaDesktop
Android	same JNI symbols, per-ABI .so	buildNagaAndroid (cargo-ndk)
iOS	cinterop over include/awake_naga.h	buildNagaIosArm64 / ...SimulatorArm64
wasmJs	throws — browsers take WGSL directly	—

The shim is rust-native/ (~150 lines over naga). Native builds are manual/on-demand, same policy as jolt's buildJoltC*; a Rust toolchain (rustup, plus cargo-ndk and the iOS/Android targets) is required to build them and is NOT part of the default check.

Version pinning: rust-native/Cargo.toml pins the naga crate; keep it in step with the naga-cli the shader-pipeline convention shells out to, or runtime compilation accepts/emits differently than the committed-.spv path.

Verification honesty: desktop runs real JNI round-trip tests; Android is compile+.so-build verified (no instrumented run yet); iOS is cinterop-compile and framework-link verified (no device run).