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 agentmods add skills/proflead/codex-skills-library/prompt-optimizationnpx skills add proflead/codex-skills-library --skill prompt-optimizationgit clone --depth 1 https://github.com/proflead/codex-skills-libraryWrote 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/proflead/codex-skills-library/prompt-optimization)<a href="https://agentmods.dev/skills/proflead/codex-skills-library/prompt-optimization"><img src="https://agentmods.dev/badge/skills/proflead/codex-skills-library/prompt-optimization.svg" alt="Measured on agentmods" 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 | $0.00051 | $0.00217 |
| Opus 5 | $0.00026 | $0.00109 |
| Sonnet 5 | $0.00010 | $0.00043 |
| Haiku 4.5 | $0.00005 | $0.00022 |
Grade A, and why
prompt-optimization 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 5d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 5d ago First seen · 34 lines · 51 tokens per session scan A e3a3208e3063
prompt-optimization is a skill published in the GitHub repository proflead/codex-skills-library (140 stars, last pushed 1mo ago), with no licence file. It adds 51 tokens to every session and 217 once invoked, about $0.0003 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 2026-08-30.
Other skills, from other repositories
encoding-fix-script-first
Enforce script-only text encoding fixes in any repository. Use when files contain mojibake, broken Cyrillic/UTF-8 text, or UTF-8 BOM issues, and require Codex to run the bundled scripts/fixmojibake.py instead of manual or ad-hoc encoding edits.
better-prompt
当用户明确要求"优化 prompt"、"改进提示词"、"润色指令"或"将简陋 prompt 转换为最佳实践版本"时使用。基于 OpenAI 和 Anthropic 官方最佳实践，对用户提供的简陋 prompt 进行结构化优化，输出符合社区标准的高质量版本。.
prompt-programming
当用户明确要求“把 prompt 改写成伪代码”“将提示词翻译成可编程自然语言”“输出具有程序结构的人类语言指令”或直接提到 prompt-programming 时使用。将用户原始 prompt 翻译为一种简洁、严谨、可组合的 Prompt Program 方言：形式上像假代码，语义上仍是人类自然语言。.
boostprompt
Use quando uma necessidade de negócio ou técnica precisar de discovery estruturado em pt-BR e de um prompt de implementação autocontido.
token-saver
Minimize token consumption & maximize prompt cache hit rate. Use when user asks to save tokens, reduce cost, improve cache hit rate, or be more concise.
find-skills
检索已安装技能并给出使用方法。.