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Prompt Missing Input Schema

GPTClaudeDeepSeek··▲ 1,200 copies·updated 2026-07-14

prompt-missing-input-schema.prompt

---
title: prompt.missing_input_schema
---

## What it checks

Crux emits this finding when a prompt definition is visible in the Project Index but has no inspectable input schema.

## Why it matters

Prompt input schemas are the TypeScript contract for prompt calls, composed contexts, replay, eval cases, and devtools inspection.

## How to fix

Declare the prompt input with Zod or another schema shape Crux can project into JSON Schema.

## When to suppress

Suppress only when the prompt is intentionally static or validated by another typed boundary:

when to use it

Community prompt sourced from the open-source GitHub repo use-crux/crux (Apache-2.0). A "Prompt Missing Input 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.