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How do you version, test and safely roll out prompt changes?

Q: How do you version, test and safely roll out prompt changes?

**TL;DR.** Treat prompts as **code**: version them in git or a registry, review changes, gate merges on an **eval suite**, roll out via **canary**, keep instant rollback. Small wording edits can regress distant behaviours — never hot-edit production prompts. edit v42 PR + review eval gate golden set score <line class='d-edge'

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Understand the problem

Prompts are code: review, eval gates, and staged rollout instead of vibes-driven edits.

prompt-versioningevalsdeploymentllmops

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Read the code

Eval-gated CI for a prompt PR

# .github/workflows/prompt-ci.yml (essence)
npm run eval -- --prompt support-triage@HEAD --dataset golden/triage.jsonl \
  --baseline main --report eval-report.md

# fails the build if any tracked metric drops beyond threshold:
#   accuracy      0.91 -> 0.92   OK
#   faithfulness  0.97 -> 0.89   FAIL (-0.08 > 0.02 tolerance)

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