# Helix Docs > Concepts and API-reference source for Helix. ## Docs - [API reference](https://docs.helix.ax/api-reference/overview.md): Status of the public Helix API reference. - [Changelog](https://docs.helix.ax/changelog.md): Public documentation changes. - [Decision over label](https://docs.helix.ax/concepts/decision-over-label.md): Why Helix treats the operational call as the product. - [Evidence and abstention](https://docs.helix.ax/concepts/evidence-and-abstention.md): How Helix keeps uncertainty explicit instead of hiding it behind a score. - [Overview](https://docs.helix.ax/index.md): Concepts and API-reference source for Helix. ## OpenAPI Specs - [openapi](https://docs.helix.ax/api-reference/openapi.json)