Seven articles ago I shipped a serialization layer that recovered 1M+ messages losslessly. Today the package is on npm and the compression numbers are real. Here's where I landed. What shipped gni-compression is a domain-adaptive lossless compression package for LLM conversation data. It's a Rust native binary (via napi-rs) with a thin JS wrapper. Two functions: const { compress, decompress } = require('gni-compression') const compressed = await compress(Buffer.from(longContext)) const restored = await decompress(compressed) // lossless, verified No warmup. No session state. The domain knowledge is baked into a pre-trained dictionary (gcdict.bin) bundled with the package — trained on real LLM conversation corpora.…