# What to Score: Prompt, Output, System — Prompt Quality Scoring

Source: https://www.skillbyai.com/en/prompt-quality-scoring/i-what

> Three levels of quality.

## Each level answers a different question

You can score the **prompt text** itself (is it clear, complete and unambiguous? cheap static checks); the **outputs** it produces on test inputs (are they correct, well-formatted, faithful, safe?); and the **system** in use (do users succeed, how often do they edit or complain, what does it cost?). Output scoring is the core, because users experience outputs, but static checks catch obvious problems early and system metrics confirm real-world value.

## Levels of scoring

From cheapest to most realistic.

```text
level        examples of scores                              cost      when
prompt text  lint checklist, vague words, conflicts           ~free     every edit
outputs      format checks, rubric scores, judge ratings       moderate  every edit + release
system       task success, edits, thumbs, escalations, cost    high      after launch, A/B tests
```

## Use all three, at different speeds

Lint on every keystroke, score outputs on every commit, watch system metrics weekly.

**Quiz:** Which level of scoring reflects what users actually experience most directly?

- [x] Scoring the outputs (and system metrics in use)
- [ ] Counting words in the prompt
- [ ] The prompt file name
- [ ] The number of prompt versions

*Answer:* Scoring the outputs (and system metrics in use). Users see outputs, not prompts.