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## Catalyst Core Updates

Updates the Catalyst Core course to reflect current Catalyst CLI (v2.x) behavior, fixing setup and lab instructions that no longer matched the tool.

* **Lab setup** now uses `degit` instead of `pnpm dlx create-next-app` to provision lab starter code.
* **Reconnecting a project** to a storefront channel now uses `pnpm catalyst channel link`, replacing the removed `init` command.
* **Documents `CATALYST_ACCESS_TOKEN`**, the CLI-only credential that replaced the `.catalyst` file, including that it should be excluded from deployment environment variables.
* **Adds a brief introduction to the Catalyst CLI** as a tool distinct from the initial installer, with a link to the full CLI reference.
* **Removes outdated references** to a `core/` project subdirectory, since the CLI no longer scaffolds a monorepo clone.

For more information, see the [Catalyst CLI reference](/developer/docs/storefront/catalyst/reference/cli).