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Prompt Missing Output Schema

GPTClaudeGemini··▲ 1,209 copies·updated 2026-07-14

prompt-missing-output-schema.prompt

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title: prompt.missing_output_schema
---

## What it checks

Crux emits this finding in strict lint mode when a prompt has no inspectable output schema.

## Why it matters

Prompt output schemas make generated objects inspectable and comparable, and let evals assert structured behavior instead of only text.

## How to fix

Add an `output` schema when the prompt is expected to produce structured data or feed downstream code.

## When to suppress

Suppress for natural-language prompts whose output is intentionally free-form text:

when to use it

Community prompt sourced from the open-source GitHub repo use-crux/crux (Apache-2.0). A "Prompt Missing Output Schema" style prompt — adapt the placeholders and specifics to your task. Imported as-is and not independently retested here, so check the output before relying on it.