claude-codex-settings is a collection of configurations and reusable extensions for Claude Code, OpenAI Codex, Cursor, and related coding tools. Developers use its skills, commands, hooks, agents, plugins, and MCP servers to shape coding-agent workflows and connect alternative model APIs. The catalogue entries are components of this collection that can be installed into supported coding tools.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add fcakyon/claude-codex-settings --skill schemagit clone --depth 1 https://github.com/fcakyon/claude-codex-settingsWrote 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/fcakyon/claude-codex-settings/schema)<a href="https://agentmods.dev/skills/fcakyon/claude-codex-settings/schema"><img src="https://agentmods.dev/badge/skills/fcakyon/claude-codex-settings/schema.svg" alt="Measured on agentmods" 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 | $0.00043 | $0.01005 |
| Opus 5 | $0.00022 | $0.00502 |
| Sonnet 5 | $0.00009 | $0.00201 |
| Haiku 4.5 | $0.00004 | $0.00101 |
Grade A, and why
schema 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 4d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- schema — 95% identical, 6 lines differ
How it starts
The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Schema markup
Structured data tells a search engine what a page is rather than making it rank. Done right it earns a richer result and makes the page easier for an engine to summarize. Done wrong it earns a manual action.
Four rules govern everything below:
- Mark up only what the page visibly shows. Schema describing content a reader can't see is a spam signal, and it's the single most common reason markup gets penalized rather than ignored.
- Use JSON-LD, in a
<script type="application/ld+json">in the head or at the end of the body. Google recommends it, and it's the only format you can add without touching the page's markup. - Only claim types and properties the engine actually supports for a rich result. Valid schema.org markup with no supported result does nothing for search, which is fine, but don't promise a rich result it can't produce.
- Validate before it ships, then watch Search Console. Markup that validates can still be wrong about the page.
Choosing the type
| Type | Use on | Required |
|---|---|---|
| Organization | Homepage, about page | name, url |
| WebSite | Homepage, to declare a site search | name, url |
| Article, BlogPosting | Posts and news | headline, image, datePublished, author |
| Product | Product pages | name, image, offers |
| SoftwareApplication | App and SaaS pages | name, offers |
| FAQPage | A page with real questions and answers | mainEntity |
| HowTo | Step-by-step instructions | name, step |
| BreadcrumbList | Any page with breadcrumbs | itemListElement |
| LocalBusiness | A location page | name, address |
| Event | Events and webinars | name, startDate, location |
references/schema-examples.md has a complete, valid block for each of these plus a combined @graph and a Next.js pattern. references/required-properties.json is the same table in the form the bundled validator reads, so adding a type means editing both.
When a page needs several types, prefer one @graph array over several separate script tags: entities can then reference each other by @id instead of repeating themselves.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 57 lines · 43 tokens per session scan A 811b00013baf
schema is a skill published in the GitHub repository fcakyon/claude-codex-settings (1,133 stars, last pushed yesterday), licensed Apache-2.0. It adds 43 tokens to every session and 1,005 once invoked, about $0.0002 per session on Opus 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 2026-09-03.
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