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Optimize AI Prompts with X9-Agent Instructions for Codex

Optimize AI Prompts with X9-Agent Instructions for Codex

Regular price £9.99
Regular price £9.99 Sale price
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Works withClaude CodeCursorCodex
Optimize AI Prompts with X9-Agent Instructions for Codex

Optimize AI Prompts with X9-Agent Instructions for Codex

Regular price £9.99
Regular price £9.99 Sale price
SAVE Sold out

Optimize AI Prompts with X9-Agent Instructions for Codex

This skill specializes in writing and reviewing prompts, task briefs, and agent-instruction files for AI coding agents like Codex. It is designed for developers and teams who utilize Claude Code, Cursor, and Codex for their AI development needs, but is not intended as the primary tool for repository onboarding files, skill authoring, or executing tasks.

What this skill does

  • Facilitates the creation and review of prompts and task briefs within AI environments such as OpenCode, Claude Code, and Codex.
  • Serves as a quality rubric for instructional content related to AI agent workflows.
  • Supportive for structural compatibility with agent skills, although invocation behavior must be assessed within actual runtime contexts.
  • Embodies prompt or brief handed to another AI agent or integrated into new chat systems, ensuring consistency in AI interactions.

Who it is for

  • Software developers working with AI models like Codex.
  • Development teams needing to maintain consistency across AI-generated tasks and instructions.
  • Technical writers and AI engineers tasked with constructing and reviewing AI agent instructions.

Use cases

  • Enhancing the quality and consistency of AI prompt designs and task briefs.
  • Providing a structure for assisting developers with instructional content review and evaluation.
  • Complementing other tools like `x9-context-files-generator` and `x9-skill-creator` for broader AI project development needs.

Technical details

  • Engages with tools such as agent-skills, aiapplication, and x9-agent-instructions.
  • Provides structural compatibility within Claude Code, Cursor, and Codex frameworks.
  • Designed for use in conjunction with specific X9 framework components.

Source & Licence

This package is built on open-source work published by xonika9 (xonika9/agent-skills) and distributed under MIT. The original licence text and copyright notice are included in your download.

Personal and commercial use, modification and redistribution are permitted, provided the original copyright and licence notice are retained.

Your purchase covers curation, licence verification, packaging, documentation and instant delivery. It does not grant exclusive rights to the underlying open-source code, which remains available under its original licence.

Delivery & Support

  • Delivery: instant — a secure download link is emailed to you as soon as payment is confirmed.
  • Format: ZIP archive containing the skill files, documentation and the original licence.
  • Support: support@mcpcart.com — we aim to reply within 2 business days.
  • Updates: updates are included only where stated on this page.

Refunds

This is a digital product delivered immediately after purchase. By completing your order you request immediate delivery and acknowledge that, once the download has been accessed, the statutory right to cancel no longer applies to the extent permitted by law. Refund requests are handled in accordance with our published Refund Policy.

Claude, Codex, Gemini and Cursor are trademarks of their respective owners. MCP Cart is an independent marketplace and is not affiliated with, endorsed by, or sponsored by any of them. Compatibility references describe interoperability only.

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Reviews

Trusted by Developers & Marketers

Here's what buyers say about the skills they use every day.

Ran it on a client's Google Ads account and it flagged wasted spend we'd been missing for months. Paid for itself on day one.

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James T.
PPC Specialist, UK

We finally caught broken conversion tags before launch instead of after. The pre-launch checklist alone is worth the price.

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Sofia M.
Growth Marketer

Dropped it into Claude Code and my LCP went from 4.1s to 1.9s in an afternoon. It explains every fix it suggests, so I actually learned something too.

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Daniel K.
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Our agency uses it as the final review step on every PR now. It catches security issues our linters never did.

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Priya R.
Tech Lead

Made WCAG 2.2 compliance actually manageable. It walked through our whole storefront and produced a fix list our devs could work from directly.

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Laura B.
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As an expat freelancer in France, the DGFIP simulation saved me a very expensive appointment with an accountant. Incredibly thorough.

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Mark D.
Freelance Consultant, Paris

Works with both Cursor and Claude Code exactly as advertised. Setup took less than five minutes with the included README.

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Anna W.
E-commerce Manager

Instant delivery, clean files, clear docs. This is how digital products should be sold. Already bought three more skills.

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Thomas L.
Startup Founder

Support answered my install question within a couple of hours on a Sunday. The skill itself has become part of my daily workflow.

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Yuki S.
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