Add gpt 5.4 prompting guide

[itsryu-dq]

Summary

This PR adds a new notebook:

examples/gpt-5/gpt-5-4_prompting_guide.ipynb

The notebook introduces practical prompting patterns for GPT-5.4 workflows, including:

• prompt structure and verbosity control
• scope constraints for coding and document workflows
• tool usage and verification patterns
• structured extraction prompts
• long-context and compaction workflows
• prompt migration considerations from earlier GPT-5 models

The notebook structure follows the style of the existing GPT-5.2 Prompting Guide while focusing on practical prompt design patterns for GPT-5.4.

The PR also includes the necessary registry.yaml entry so the notebook renders on the OpenAI Cookbook website.

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Motivation

Developers building GPT-5-class applications often need practical guidance on how to structure prompts for complex workflows such as:

• multi-step agent execution
• tool-integrated pipelines
• document analysis and structured extraction
• long-context reasoning tasks

This notebook provides a structured set of prompt patterns and examples that developers can reuse when designing GPT-5.4 workflows.

The goal is to extend the existing GPT-5 prompting guidance in the Cookbook with a focused guide for GPT-5.4 while maintaining consistency with the structure and style of the existing GPT-5.2 guide.

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For new content

• I have added a new entry in [registry.yaml](https://github.com/openai/openai-cookbook/blob/main/registry.yaml) (and, optionally, in [authors.yaml](https://github.com/openai/openai-cookbook/blob/main/authors.yaml)) so that my content renders on the cookbook website.

• I have conducted a self-review of my content based on the [contribution guidelines](https://github.com/openai/openai-cookbook/blob/main/CONTRIBUTING.md#rubric):

  • Relevance: The notebook focuses on prompt design patterns for GPT-5-class models and is intended to help developers building applications with OpenAI models.

  • Uniqueness: I reviewed existing Cookbook examples and confirmed that this notebook focuses specifically on GPT-5.4 prompt patterns and workflow considerations.

  • Spelling and Grammar: I reviewed the document for spelling and grammatical accuracy.

  • Clarity: The notebook is structured in clearly separated sections covering prompting patterns, workflows, and examples.

  • Correctness: The code examples follow the current OpenAI Responses API structure and execute successfully.

  • Completeness: The guide includes explanations, examples, and references necessary for developers to understand and apply the patterns.

[itsryu-dq]

This PR is ready for maintainer review.

Summary of final updates:

• Finalized the GPT-5.4 prompting guide notebook with a full editorial pass.
• Repaired and validated the notebook JSON structure.
• Added the required registry.yaml entry.
• Added an authors.yaml entry for ryu-omnithrex.
• Verified the notebook against the repository notebook validation script.
• Confirmed no additional repository files require updates based on the contribution guidelines.

The guide now includes:

• practical prompt patterns for GPT-5.4 workflows
• completion criteria and scope-discipline patterns
• long-context, tool-usage, and structured extraction guidance
• prompt migration and evaluation guidance
• common failure modes, debugging guidance, and production checklist
• worked examples and reusable prompt stacks

From my side, the PR is finalized and ready for review. Happy to make any follow-up changes if maintainers want adjustments for style or alignment.