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 improvement-skill-evalgit 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/improvement-skill-eval)<a href="https://agentmods.dev/skills/blueskyxn/codex-is-all-you-need/improvement-skill-eval"><img src="https://agentmods.dev/badge/skills/blueskyxn/codex-is-all-you-need/improvement-skill-eval/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/improvement-skill-eval"><img src="https://agentmods.dev/badge/skills/blueskyxn/codex-is-all-you-need/improvement-skill-eval.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 | $0.00081 | $0.00466 |
| Opus 5.5 | $0.00032 | $0.00186 |
| Sonnet 5.5 | $0.00016 | $0.00093 |
| Haiku 4.5 | $0.00008 | $0.00047 |
Grade A, and why
improvement-skill-eval 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 today.
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.
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
2 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.
- today First seen · 51 lines · 81 tokens per session scan A 76acff3741ec
improvement-skill-eval is a skill published in the GitHub repository BlueSkyXN/Codex-is-all-you-need (22 stars, last pushed today), licensed GPL-3.0. It adds 81 tokens to every session and 466 once invoked, about $0.0003 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 2026-11-13.
improvement-skill-eval compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| improvement-skill-evalBlueSkyXN/Codex-is-all-you-need | Skill | 22 | today | GPL-3.0 | A | 81 | Claude Code, Codex |
| cf-clicloudflare/skills | Skill | 3.4k | 2d ago | Apache-2.0 | A | 78 | Claude Code |
| workers-best-practicescloudflare/skills | Skill | 3.4k | 2d ago | Apache-2.0 | A | 25 | Claude Code |
| cloudflare-app-bootstrapcloudflare/skills | Skill | 3.4k | 2d ago | Apache-2.0 | A | 69 | Claude Code |
| find-journalistselvisun/newsjack | Skill | 1.7k | yesterday | MIT | A | 52 | Claude Code |
| story-origin-checkelvisun/newsjack | Skill | 1.7k | yesterday | MIT | A | 40 | Claude Code |
| relevance-coarse-filterelvisun/newsjack | Skill | 1.7k | yesterday | MIT | A | 57 | Claude Code |