Gpt 5 4 Prompting is an agent skill from juanandresgs/claude-ctrl. Internal guidance for composing Codex and GPT-5.4 prompts for coding, review, diagnosis, and research tasks inside the Codex Claude Code plugin
Its SKILL.md is about 910 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `references/codex-prompt-antipatterns.md`, `references/codex-prompt-recipes.md` and `references/prompt-blocks.md`).
It sits in Agent Workflows, covering Hooks and plugins. It works with OpenAI. The repository describes itself as: DEPRECATED / UNMAINTAINED — historical reference only. Do not install or rely on this project.