# Decantr V2 Package Release

Decantr V2 is the first clean-slate release line for the Essence v4 contract.

This release publishes the stable public Decantr npm surface as `2.0.0`:

- `@decantr/essence-spec`
- `@decantr/registry`
- `@decantr/css`
- `@decantr/core`
- `@decantr/telemetry`
- `@decantr/verifier`
- `@decantr/mcp-server`
- `@decantr/cli`

The product boundary is intentionally breaking:

- active workflows read and write Essence `4.0.0`
- Essence v2, v3.0, and v3.1 are migration inputs only
- old projects should run `decantr migrate --to v4`
- first-mile realization remains adapter-based and stack agnostic
- brownfield adoption remains observe-first

`@decantr/vite-plugin` remains experimental and outside the default V2 publish wave.