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TDD red phase: write the tests first v1.0.0

Use this resource to write failing tests from an issue's requirements

New

  • 323 downloads
  • 217 likes
  • 218 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install tdd-red-subagent

First time: connect the CLI with

npx --yes palatekit@latest login

This subagent finds the issue from the branch name, pulls acceptance criteria and edge cases from its comments, then writes tests that describe the expected behaviour. It checks that each test fails for the right reason. The main agent hands it the job before the code is written.

Mostly picked by

Updated November 2, 2026

Card for “TDD red phase: write the tests first”

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): test-first principles and test naming conventions
  • A link between the branch name and the issue number
  • Edge cases taken from the issue comments

Good fit for

  • A feature whose criteria live in an issue
  • A bug to lock in a test before the fix

Not for

    Tags

    • tdd
    • tests
    • github
    • issues

    About

    You say

    “Write the red tests for issue 58 on the current branch.”

    Card for “TDD red phase: write the tests first”

    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 failing tests from an issue's requirements, or call the subagent by name
    3. Review its work

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • tdd-red-subagent.md3.5 KB

    Origin and licence

    Listed unmodified

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

    Notice

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

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