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Design and test prompts v1.0.0

Use this resource to write, improve or test a prompt

New

  • 135 downloads
  • 68 likes
  • 99 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install prompt-builder-subagent

First time: connect the CLI with

npx --yes palatekit@latest login

This subagent plays two roles: Prompt Builder writes or improves the prompt, and Prompt Tester validates it before delivery. It analyses the prompt with read and search tools, without adding concepts absent from the sources. The main agent hands it a prompt to make more reliable.

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Updated November 2, 2026

Card for “Design and test prompts”

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • The subagent file (in English): two roles, requirements and writing rules
  • A mandatory test step before a prompt is considered finished
  • Guidance on clear imperatives and logical structure

Good fit for

  • An ambiguous system prompt in an agent
  • A prompt that gives uneven results

Not for

    Tags

    • prompt
    • engineering
    • testing
    • instructions

    About

    You say

    “Improve this summary prompt and test it.”

    Card for “Design and test prompts”

    Subagent published by davila7 under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Copy the file into .claude/agents/ (project) or ~/.claude/agents/ (all your projects)
    2. Ask your agent to write, improve or test a prompt, or call the subagent by name
    3. Review its work

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • prompt-builder-subagent.md18.4 KB

    Origin and licence

    Listed unmodified

    Author
    davila7
    Source
    github.com/davila7/claude-code-templates/blob/f57964ebda91cdfb31755661ecea9395f30020f1/cli-tool/components/agents/data-ai/prompt-builder.md
    Licence
    MIT

    Notice

    « prompt-builder » (davila7, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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