CodexGuide is a practical knowledge base and learning guide for using Codex across development, writing, research, automation, and team workflows. It serves beginners, developers, creators, researchers, and teams who want to learn how to use Codex and incorporate it into real tasks. The catalogue entries are Codex skills associated with this guide.
Borrowing it
Nothing to install: this file belongs to freestylefly/CodexGuide. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/freestylefly/CodexGuide/main/.agents/skills/codexguide-development/SKILL.mdgit clone --depth 1 https://github.com/freestylefly/CodexGuideWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/freestylefly/codexguide/codexguide-development)<a href="https://agentmods.dev/skills/freestylefly/codexguide/codexguide-development"><img src="https://agentmods.dev/badge/skills/freestylefly/codexguide/codexguide-development/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/freestylefly/codexguide/codexguide-development"><img src="https://agentmods.dev/badge/skills/freestylefly/codexguide/codexguide-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00042 | $0.00565 |
| Opus 5.5 | $0.00017 | $0.00226 |
| Sonnet 5.5 | $0.00008 | $0.00113 |
| Haiku 4.5 | $0.00004 | $0.00056 |
Grade A, and why
codexguide-development scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
CodexGuide 开发规则
本 Skill 是 CodexGuide 的项目规则集合。每条规则都应保持极简、可迁移、可扩展，并写明触发场景、执行步骤和可检查的完成标准。
规则 1：文档迁移原则
当文档被移动、重命名、重排编号，或放入新的章节分组时，使用本规则。目标是迁移完成后，仓库看起来像内容本来就位于最终位置一样自然。
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确定最终位置。
- 如果用户指定目标位置，按用户指定的位置处理。
- 如果用户未指定，根据当前文档结构判断最合适的章节。 完成标准：最终目录、文件名、所在顺序都已明确。
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真正移动文档。
- 如果所在章节使用编号文件名，同步重命名文件，保持编号连续。
- 按需顺延或回退受影响的相邻文档。
- 周围章节使用编号时，不保留无编号的过渡文件。 完成标准：文件系统顺序与预期阅读顺序一致。
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更新所有相关引用。
- 在仓库中搜索旧路径、旧 slug、标题和旧编号文件名。
- 若 Markdown 链接、README、导航、侧边栏、SEO 元数据、致谢页或索引页指向被移动内容，都要同步更新。 完成标准：仓库搜索不到指向旧文档路径的过期引用。
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修复阅读链路。
- 更新被移动文档和受影响相邻文档底部的
下一步链接。 - 保持索引列表编号与文件名编号一致。 完成标准：从前一篇读到迁移文档，再读到后一篇时，顺序符合新的文档结构。
- 更新被移动文档和受影响相邻文档底部的
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验证迁移结果。
- 先运行最小有效检查：优先搜索旧链接；可行时运行站点构建。
- 如果跳过某项检查，说明原因。 完成标准：验证结果已记录，剩余风险已说明。
扩展方式
后续项目规范按独立编号规则追加。每条规则只放一个清晰约束，避免把不同职责混在同一条规则里。
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 43 lines · 42 tokens per session scan A 3ab7af963426
codexguide-development is a skill published in the GitHub repository freestylefly/CodexGuide (3,966 stars, last pushed yesterday), licensed MIT. It adds 42 tokens to every session and 565 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
codexguide-development compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| codexguide-developmentfreestylefly/CodexGuide | Skill | 4.0k | yesterday | MIT | A | 42 | Claude Code, Codex |
| merge-batchdiegosouzapw/OmniRoute | Skill | 83k | 5d ago | MIT | A | 46 | Claude Code |
| prowler-commitprowler-cloud/prowler | Skill | 15k | yesterday | Apache-2.0 | A | 44 | Claude Code, Codex |
| gh-auth-isolationgithub/gh-aw | Skill | 5.6k | yesterday | MIT | A | 20 | Claude Code, Codex |
| github-skillzeenie-ai/OpenCompany | Skill | 1.1k | yesterday | MIT | A | 51 | Claude Code |
| comet-githubrpamis/comet | Skill | 3.3k | yesterday | MIT | A | 72 | Claude Code, Codex |
| release-helperSahir619/fable-method | Skill | 2.3k | 1mo ago | MIT | A | 43 | Claude Code |