> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/continuous-delivery/3.0/resources.md).

# Resources

- [CD Best Practices](https://developer.harness.io/continuous-delivery/3.0/resources/cd-best-practices.md): Best practices for Harness Continuous Delivery deployments — strategy selection, environment management, rollback, governance, and operational safety.
- [Harness Integration Upgrade Policy](https://developer.harness.io/continuous-delivery/3.0/resources/toolchain-policy.md): Understand how Harness tests and upgrades the versions of integrations used by Harness Deployments, and what support customers can expect.