Prompt Engineering Is Solved—Prompt Management Isn’t

Changing prompt templates in production systems can lead to failures that standard testing and review processes often miss. This occurs because a prompt's input variables can change without any tooling to check the actual code locations that rely on them, breaking the implicit contract. To address this, a static analysis tool called `promptctl` was developed to treat prompt changes like schema migrations, validating them before deployment. The tool uses a three-pass system to detect variable changes, validate contracts, and analyze the impact across a codebase without needing any LLM calls or external dependencies.