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.…