# Core concepts

> How organizations, repos, and the extension registry fit together in Bedrock.

## Pages

- [Core concepts](https://marketing--pr-1329.buildr-bedrock-preview.dev/docs/index.md) — How organizations, repos, and the extension registry fit together in Bedrock.
- [CI checks](https://marketing--pr-1329.buildr-bedrock-preview.dev/docs/ci-checks/index.md) — Deterministic data verification with standard library checks and custom TypeScript checks.
- [Version control](https://marketing--pr-1329.buildr-bedrock-preview.dev/docs/version-control/index.md) — Branches, working state, commits, checkpoints, diffs, three-way merges, and change requests in a Bedrock repo.