How do you guarantee consistency across prompt versions in production?

Consistency is guaranteed using immutable prompt versioning, registry-based deployment, and strict rollback mechanisms.

Prompt inconsistency arises when different services use different prompt versions or untracked modifications. Production systems solve this using a prompt registry where each prompt is immutable once deployed. Services reference prompts by version ID, ensuring reproducibility. Rollbacks are performed by switching version pointers instead of editing prompts directly.