[zhangzhenghao]

Summary

• Add synchronous Node-API CPU bindings under node/, with TypeScript declarations and CommonJS loading.
• Expose model metadata, tokenization, text/audio embeddings, frame/CLaMP3 features, decoding/resampling, and explicit close; copy typed-array outputs and validate inputs.
• Build self-contained static ggml/ICU/miniaudio dependencies with cmake-js; include pinned native sources and licenses in independently installable npm source tarballs.
• Add deterministic CLAP/MERT integration fixtures, numerical text comparison and a subprocess regression for token-array getter reentrancy.
• Add Linux x64/ARM64, macOS and Windows CI for source builds, types, packaging and standalone installed-package tests.

Verification

• Independent review passed after fixing reentrant close/use-after-free and Apple MODULE linking.
• Linux x64 Node runtime tests: 8/8 passed, including actual CLAP waveform/text and MERT frame/feature inference and NumPy numerical reference.
• TypeScript checks passed.
• Source tarball build/install and installed-package fixture generation/runtime tests passed (8/8).
• Existing native CTest: 26/26 passed.
• git diff --check passed.

Notes

• Requires Node.js 22+, CMake 3.20+ and a C++17 toolchain; builds from source (no prebuilt binaries).
• CPU-only synchronous API blocks its JavaScript thread; use a separate model per worker thread.
• macOS, Windows and ARM verification is delegated to this PR's CI; published-weight accuracy/performance is not benchmarked here.