Steers his mighty boat in safety, Through the perils of the whirlpool, Through the watery deeps and dangers.

Automate changelogs, versioning, and publishing—even for monorepos across multiple package registries. Currently supported ecosystems: Rust (Crates), JavaScript/TypeScript (npm), Elixir/Gleam/Erlang (Hex), Python (PyPI), PHP (Packagist), Java (Maven Central)... And more coming soon!

Don't know where to start? Check out Sampo's documentation or join us on Discord!

Crates

Sampo is a monorepo that contains the following crates (Rust packages):

Name	Description	Registry	README
sampo	CLI to manage changesets, versioning, and publishing		README
sampo-core	Core logic, common types, and internal utilities		README
sampo-github-bot	GitHub App to inspect PRs and request changesets		README
sampo-github-action	GitHub Action to automate the release and publishing process.		README

Packages

The sampo CLI is also distributed on npm so it can be installed via pnpm/npm/yarn/bun without a Cargo toolchain:

Name	Description	Registry	README
sampo	CLI to manage changesets, versioning, and publishing		README

Acknowledgements

Sampo is deeply inspired by Changesets and Lerna, but made with Rust and designed for multi-ecosystems monorepos. Read more about Sampo's alternatives.

Sampo uses Knope's changesets crate to parse changeset files. Knope is another Rust project inspired by Changesets, we highly recommend checking it out!

Sampo uses and enforces Semantic Versioning (SemVer), like their standard MAJOR.MINOR.PATCH version format and the "Version Bumps" concepts.

Sampo is an open-source project born from Bruits, a Rust-focused collective 💛