Why it matters

Bad prompt management causes regression. Understanding practices enables reliable iteration.

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The architecture

Templates: parameterized prompts with placeholders.

Versioning: prompts in Git; PRs for changes.

Testing: prompt eval on change.

Prompt managementTemplatesparameterizedVersioningGit + PR reviewTesting + evalon every changePrompt changes reviewed and tested like code — infrastructure, not text
Prompt lifecycle.
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How it works end to end

Template engine: Java string templates or Handlebars.

A/B testing: run multiple prompt versions in production.

Rollback: quick revert on regression.

Documentation: intent + expected behavior per prompt.