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Prompt Regression Tests

Catch quality drops when prompts or models change.

Intermediate14h1–2 people17/20 fit
TL;DR

Build Prompt Regression Tests for teams shipping llm features in ~14h with 1–2 people. Stack: Node.js + LLM + GitHub Actions.

Why it wins: Essential for AI-era engineering.

Build flow

01 · Problem
A small prompt change silently breaks LLM features.
02 · Solution
Define test cases with expected properties, run them against prompt versions and models and show diffs and scores in CI.
03 · Build
  1. 1Define test format
  2. 2Run prompts
  3. 3Score outputs
  4. 4Report
04 · Demo
Change a prompt and see two tests fail.

MVP checklist

  • Test cases
  • Property checks
  • Version diff
  • CI report

Tech stack

TechRole
Node.jsBackend runtime
LLMLanguage model
GitHub ActionsRepo + PR data

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