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 BlueSkyXN/Codex-is-all-you-need --skill core-codex-agents-md-buildergit clone --depth 1 https://github.com/BlueSkyXN/Codex-is-all-you-needWrote 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/blueskyxn/codex-is-all-you-need/core-codex-agents-md-builder)<a href="https://agentmods.dev/skills/blueskyxn/codex-is-all-you-need/core-codex-agents-md-builder"><img src="https://agentmods.dev/badge/skills/blueskyxn/codex-is-all-you-need/core-codex-agents-md-builder/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/blueskyxn/codex-is-all-you-need/core-codex-agents-md-builder"><img src="https://agentmods.dev/badge/skills/blueskyxn/codex-is-all-you-need/core-codex-agents-md-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00050 | $0.02162 |
| Opus 5 | $0.00025 | $0.01081 |
| Sonnet 5 | $0.00010 | $0.00432 |
| Haiku 4.5 | $0.00005 | $0.00216 |
Grade B, and why
core-codex-agents-md-builder scanned grade B with 1 finding 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 11d 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
- **Validation 命令优先选默认沙箱可运行**（无网络、非交互、非 sudo、不依赖外部服务）。需要网络/Docker/数据库/凭据/sudo 的命令**必须显式标注**。 The source is not reproduced here
Licensed GPL-3.0
The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
4 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.
- 11d ago First seen · 150 lines · 50 tokens per session scan B 883ffc6ec88d
core-codex-agents-md-builder is a skill published in the GitHub repository BlueSkyXN/Codex-is-all-you-need (21 stars, last pushed 26d ago), licensed GPL-3.0. It adds 50 tokens to every session and 2,162 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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