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Claude Code hook provides failing tests to AI before coding starts

By PulseAugur Editorial · [1 sources] ·

A developer has created a custom hook for Claude Code that automatically runs failing tests before the AI begins its coding session. This hook, named `red_tests.py`, leverages pytest to identify and report only the tests that fail, providing this information to Claude Code as context before any user prompts are entered. The system is designed to inform Claude Code about the specific issues, allowing it to address them more effectively without needing manual input. AI

IMPACT Enhances AI coding assistants by providing immediate context of failing tests, potentially speeding up debugging and development cycles.

RANK_REASON Developer-created tool integration for an AI coding assistant.

Read on dev.to — Claude Code tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Claude Code hook provides failing tests to AI before coding starts

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Signal score
26 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Developer-created tool integration for an AI coding assistant.
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Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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product, other
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High
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Breaking (< 6h)
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Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — Claude Code tag TIER_1 English(EN) · Gabriel Anhaia ·

    A SessionStart Hook That Hands Claude Code the Failing Tests Before Its First Turn

    <ul> <li> <strong>Book:</strong> <a href="https://www.amazon.com/dp/B0GYJZ2XJD" rel="noopener noreferrer">AI Agents Pocket Guide</a> </li> <li> <strong>The series:</strong> <em>Pocket Guides for Developers</em> — 8 short books on agents, RAG, prompts, observability, events, datab…

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