Codex Fable5
baskduf/FableCodex
Apply a Claude Fable 5 inspired operating style inside Codex.
A skill your agent uses when generating research/factcheck/image/video/slide prompts that need base templates (IFCN·StructuredResearch 등) — 단일 통합 AI 프롬프트 엔지니어링 레퍼런스의 라우팅 인덱스.
Install Prompt Engineering Guide
$ npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install treylom/prompt-engineering-skills prompt-engineering-guide --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/treylom/prompt-engineering-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/prompt-engineering-guide .claude/skills/prompt-engineering-guide && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "prompt-engineering-guide" agent skill from https://github.com/treylom/prompt-engineering-skills/tree/master/skills/prompt-engineering-guide into .claude/skills/prompt-engineering-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineering-guide", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/treylom/prompt-engineering-skills/tree/master/skills/prompt-engineering-guideType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install treylom/prompt-engineering-skills prompt-engineering-guide --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/treylom/prompt-engineering-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/prompt-engineering-guide .agents/skills/prompt-engineering-guide && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "prompt-engineering-guide" agent skill from https://github.com/treylom/prompt-engineering-skills/tree/master/skills/prompt-engineering-guide into .agents/skills/prompt-engineering-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineering-guide", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install treylom/prompt-engineering-skills prompt-engineering-guide --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/treylom/prompt-engineering-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/prompt-engineering-guide .cursor/skills/prompt-engineering-guide && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "prompt-engineering-guide" agent skill from https://github.com/treylom/prompt-engineering-skills/tree/master/skills/prompt-engineering-guide into .cursor/skills/prompt-engineering-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineering-guide", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/treylom/prompt-engineering-skills.git --path skills/prompt-engineering-guide--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install treylom/prompt-engineering-skills prompt-engineering-guide --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/treylom/prompt-engineering-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/prompt-engineering-guide .gemini/skills/prompt-engineering-guide && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "prompt-engineering-guide" agent skill from https://github.com/treylom/prompt-engineering-skills/tree/master/skills/prompt-engineering-guide into .gemini/skills/prompt-engineering-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineering-guide", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install treylom/prompt-engineering-skills prompt-engineering-guideInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/treylom/prompt-engineering-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/prompt-engineering-guide .github/skills/prompt-engineering-guide && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "prompt-engineering-guide" agent skill from https://github.com/treylom/prompt-engineering-skills/tree/master/skills/prompt-engineering-guide into .github/skills/prompt-engineering-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineering-guide", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install treylom/prompt-engineering-skills prompt-engineering-guide --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/treylom/prompt-engineering-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/prompt-engineering-guide .opencode/skills/prompt-engineering-guide && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "prompt-engineering-guide" agent skill from https://github.com/treylom/prompt-engineering-skills/tree/master/skills/prompt-engineering-guide into .opencode/skills/prompt-engineering-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prompt-engineering-guide", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
prompt-engineering-guide- GitHub stars
- 185
- Token cost
- ~485 tokens
- SKILL.md length
- 159 words
- Files
- 2 (incl. references)
- Skills in repo
- 10
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses when generating research/factcheck/image/video/slide prompts that need base templates (IFCN·StructuredResearch 등) — 단일 통합 AI 프롬프트 엔지니어링 레퍼런스의 라우팅 인덱스.
- Tasks that involve Prompt engineering
- SKILL.md covers 로드 방법 (/prompt 템플릿 로드 게이트), 섹션 맵 (grep 앵커 — 줄번호는 as-of… and 관련 스킬
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve Slides and decks
What it does
Prompt Engineering Guide is an agent skill from treylom/prompt-engineering-skills. Use when generating research/factcheck/image/video/slide prompts that need base templates (IFCN·StructuredResearch 등) — 단일 통합 AI 프롬프트 엔지니어링 레퍼런스의 라우팅 인덱스. 본문 전체는 references/full.md(대형 파일 — grep으로 위치 확인 후 부분 Read).
Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/full.md`).
It sits in AI & LLM Engineering, covering Prompt engineering and Slides and decks. It works with OpenAI. The repository describes itself as: Comprehensive AI prompt engineering skills for Claude Code, ChatGPT (GPTs & Codex CLI plugin), and Gemini Gems. Model-specific patterns for Claude Opus 5.5 / Fable 5.1 (Opus 5 /…
When your agent uses it
- Tasks that involve Prompt engineering
- Tasks that involve Slides and decks
Example prompts
- “/prompt-engineering-guide”
What it can do on your machine
Read from SKILL.md and the folder at commit 4dacb68. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Prompt Engineering Guide loads about 485 tokens when it runs, and up to ~66k if it reads all its reference files. Until then it costs about 60 tokens; SKILL.md has 159 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 159 words (~485 tokens).
- name
- prompt-engineering-guide
- disable-model-invocation
- true
- version
- 3.4.0
- updated
- 2026-09-27
Files
SKILL.md and 1 other file (references) in skills/prompt-engineering-guide of treylom/prompt-engineering-skills.
- SKILL.md
- references/full.md
Open the folder on GitHubat commit 4dacb68
Compare with similar skills
Prompt Engineering Guide next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Prompt Engineering Guide this skilltreylom/prompt-engineering-skills | 185 | — | ~485 | Automated safety check: Pass | Custom licence | |
| Codex Fable5baskduf/FableCodex | 437 | — | ~1.6k | Automated safety check: Pass | AGPL-3.0 | |
| System Prompt Writing Guidecashew-labs/libretto | 904 | — | ~570 | Automated safety check: Pass | MIT | |
| Persona Designkangarooking/system-prompt-skills | 205 | 1 repos | ~956 | Automated safety check: Pass | MIT | |
| AI Wrapper Productdavila7/claude-code-templates | 32k | 5 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Cline Pin TimestampOnlyTerp/prompt-cache-skills | 114 | — | ~751 | Automated safety check: Pass | Custom licence |
Similar skills
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Cline Pin Timestamp
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Prompt Library
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📝 Prompt Library workflow skill. An agent skill from diegosouzapw/awesome-omni-skills.
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A skill your agent uses when composing prompts targeting GPT-6 Sol (GPT 디폴트), GPT-6 Astra, GPT-6 Luna, GPT-5.6 Sol (직전 디폴트), legacy GPT-5.5/5.4/5.2 — lean outcome-first 7블록 규칙 + LEGACY 섹션(구 XML 스택)을…
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Related
Works with
Categories
Questions about Prompt Engineering Guide
What does Prompt Engineering Guide do?
A skill your agent uses when generating research/factcheck/image/video/slide prompts that need base templates (IFCN·StructuredResearch 등) — 단일 통합 AI 프롬프트 엔지니어링 레퍼런스의 라우팅 인덱스. Prompt Engineering Guide is an agent skill from treylom/prompt-engineering-skills. Use when generating research/factcheck/image/video/slide prompts that need base templates (IFCN·StructuredResearch 등) — 단일 통합 AI 프롬프트 엔지니어링 레퍼런스의 라우팅 인덱스.
When should I use Prompt Engineering Guide?
Prompt Engineering Guide fits situations like: tasks that involve Prompt engineering; tasks that involve Slides and decks.
How do I install Prompt Engineering Guide in Claude Code?
Run `npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a claude-code`. Or copy the skill folder (skills/prompt-engineering-guide in treylom/prompt-engineering-skills) into .claude/skills/prompt-engineering-guide in your project. Claude Code loads it when a task matches its description.
How do I install Prompt Engineering Guide in Codex?
Run `npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a codex`. Or copy the skill folder (skills/prompt-engineering-guide in treylom/prompt-engineering-skills) into .agents/skills/prompt-engineering-guide in your project. Codex loads it when a task matches its description.
Can I use Prompt Engineering Guide in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add treylom/prompt-engineering-skills --skill prompt-engineering-guide -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/prompt-engineering-guide, .gemini/skills/prompt-engineering-guide, .github/skills/prompt-engineering-guide and .opencode/skills/prompt-engineering-guide in your project.
What does Prompt Engineering Guide need to run?
SKILL.md names no scripts, command-line tools or credentials: Prompt Engineering Guide is instructions for the agent only.
Does Prompt Engineering Guide access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Prompt Engineering Guide safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Prompt Engineering Guide use?
Prompt Engineering Guide has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Prompt Engineering Guide use?
About 485 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 65k tokens, read only when the agent opens those files.
What are the alternatives to Prompt Engineering Guide?
Skills that share tags, products or a category with Prompt Engineering Guide: Codex Fable5 (baskduf/FableCodex, 437 stars), System Prompt Writing Guide (cashew-labs/libretto, 904 stars), Persona Design (kangarooking/system-prompt-skills, 205 stars) and AI Wrapper Product (davila7/claude-code-templates, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Prompt Engineering Guide?
treylom (a GitHub user) maintains it in treylom/prompt-engineering-skills, which has 185 GitHub stars. The repository holds 10 skills in this directory. The repository was last updated on September 26, 2026.
Source: treylom/prompt-engineering-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.