Agent skill

Skill Creator

Create, edit, and evaluate agent skills iteratively. An agent skill from HezaoHezao/poirot.

Install Skill Creator

skills CLI

$ npx skills add HezaoHezao/poirot --skill skill-creator -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install HezaoHezao/poirot skill-creator --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/HezaoHezao/poirot.git skills-src && mkdir -p .claude/skills && cp -r skills-src/poirot/backend/agents/skill/builtin_skills/core/skill-creator .claude/skills/skill-creator && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "skill-creator" agent skill from https://github.com/HezaoHezao/poirot/tree/master/poirot/backend/agents/skill/builtin_skills/core/skill-creator into .claude/skills/skill-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-creator", 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

$skill-installer install https://github.com/HezaoHezao/poirot/tree/master/poirot/backend/agents/skill/builtin_skills/core/skill-creator

Type 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.

skills CLI

$ npx skills add HezaoHezao/poirot --skill skill-creator -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install HezaoHezao/poirot skill-creator --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HezaoHezao/poirot.git skills-src && mkdir -p .agents/skills && cp -r skills-src/poirot/backend/agents/skill/builtin_skills/core/skill-creator .agents/skills/skill-creator && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "skill-creator" agent skill from https://github.com/HezaoHezao/poirot/tree/master/poirot/backend/agents/skill/builtin_skills/core/skill-creator into .agents/skills/skill-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-creator", 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.

skills CLI

$ npx skills add HezaoHezao/poirot --skill skill-creator -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install HezaoHezao/poirot skill-creator --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HezaoHezao/poirot.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/poirot/backend/agents/skill/builtin_skills/core/skill-creator .cursor/skills/skill-creator && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "skill-creator" agent skill from https://github.com/HezaoHezao/poirot/tree/master/poirot/backend/agents/skill/builtin_skills/core/skill-creator into .cursor/skills/skill-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-creator", 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

$ gemini skills install https://github.com/HezaoHezao/poirot.git --path poirot/backend/agents/skill/builtin_skills/core/skill-creator

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add HezaoHezao/poirot --skill skill-creator -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install HezaoHezao/poirot skill-creator --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HezaoHezao/poirot.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/poirot/backend/agents/skill/builtin_skills/core/skill-creator .gemini/skills/skill-creator && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "skill-creator" agent skill from https://github.com/HezaoHezao/poirot/tree/master/poirot/backend/agents/skill/builtin_skills/core/skill-creator into .gemini/skills/skill-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-creator", 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.

GitHub CLI

$ gh skill install HezaoHezao/poirot skill-creator

Installs 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).

skills CLI

$ npx skills add HezaoHezao/poirot --skill skill-creator -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/HezaoHezao/poirot.git skills-src && mkdir -p .github/skills && cp -r skills-src/poirot/backend/agents/skill/builtin_skills/core/skill-creator .github/skills/skill-creator && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "skill-creator" agent skill from https://github.com/HezaoHezao/poirot/tree/master/poirot/backend/agents/skill/builtin_skills/core/skill-creator into .github/skills/skill-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-creator", 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.

skills CLI

$ npx skills add HezaoHezao/poirot --skill skill-creator -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install HezaoHezao/poirot skill-creator --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HezaoHezao/poirot.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/poirot/backend/agents/skill/builtin_skills/core/skill-creator .opencode/skills/skill-creator && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "skill-creator" agent skill from https://github.com/HezaoHezao/poirot/tree/master/poirot/backend/agents/skill/builtin_skills/core/skill-creator into .opencode/skills/skill-creator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-creator", 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: skill-creator
GitHub stars: 249
Token cost: ~838 tokens
SKILL.md length: 351 words
Files: 1
Skills in repo: 23
Repo updated: Jul 28, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Create, edit, and evaluate agent skills iteratively. An agent skill from HezaoHezao/poirot.

Works in 4 steps: description ≤ 60 characters, one… → Tools referenced in prose must be native… → **Scripts go in scripts/, references in… → …
Tasks that involve Skill authoring
SKILL.md covers Poirot skill format, Authoring standards, Iteration loop and Pitfalls
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Skill Creator is an agent skill from HezaoHezao/poirot. Create, edit, and evaluate agent skills iteratively.

Its SKILL.md is about 840 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering Skill authoring and Agent evaluation and testing. The repository describes itself as: Poirot is a deep research agent kernel built for those who care about how agents are architected. The licence is MIT.

When your agent uses it

Tasks that involve Skill authoring
Tasks that involve Agent evaluation and testing

Example prompts

“/skill-creator”

Requirements

Pre-approved tools (allowed-tools): write_file, str_replace, read_file, list_dir

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

description ≤ 60 characters, one sentence, ends with a period. State
Tools referenced in prose must be native Poirot tools (listed above) or
**Scripts go in scripts/, references in references/, templates in
Keep the body focused: ~100 lines for a simple skill, ~200 for complex.

What it can do on your machine

Read from SKILL.md and the folder at commit 86bf279. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
- write_file
- str_replace
- read_file
- list_dir
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are yaml).
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

Skill Creator loads about 838 tokens when it runs. Until then it costs about 17 tokens; SKILL.md has 351 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~17
When it runs · the whole SKILL.md, loaded when a task matches: ~838

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

The full file from HezaoHezao/poirot at commit 86bf279, republished under its MIT licence (© HezaoHezao). 351 words, ~838 tokens.

Download SKILL.mdSave it as .claude/skills/skill-creator/SKILL.md (or your agent's skills folder).

name: skill-creator
description: Create, edit, and evaluate agent skills iteratively.
allowed-tools: write_file, str_replace, read_file, list_dir
enabled: true
related-skills: find-skills
license: MIT
author: Adapted from deer-flow (Bytedance, MIT)

Skill Creator

A skill for creating new skills and iteratively improving them.

At a high level, the process of creating a skill goes like this:

Decide what you want the skill to do and roughly how it should do it
Write a draft of the skill (a SKILL.md with YAML frontmatter + Markdown body)
Create a few test prompts and run them with the skill injected
Help the user evaluate the results both qualitatively and quantitatively
Rewrite the skill based on feedback from the user's evaluation
Repeat until you're satisfied
Expand the test set and try again at larger scale

Your job when using this skill is to figure out where the user is in this process and then jump in and help them progress through these stages.

Poirot skill format

A Poirot skill lives in a directory containing SKILL.md:

skills/<category>/<skill-name>/SKILL.md      # user skills
poirot/backend/agents/skill/builtin_skills/<category>/<skill-name>/SKILL.md   # builtin

Frontmatter fields:

yaml

---
name: <skill-name>            # unique, lowercase-hyphenated
description: <≤60 char one sentence ending with a period>
allowed-tools:                # Poirot tools this skill may invoke
  - web_search
  - browse_page
  - bash
  - read_file
  - write_file
  - list_dir
  - str_replace
  - present_files
  - read_snapshot
enabled: true
related-skills: [<other-skill-name>]   # optional cross-references
license: MIT                  # recommended for contributed skills
author: <human contributor or source attribution>
---

Body: # <Skill> title, 2-3 sentence intro, ## When to Use, ## How to Run, ## Procedure, ## Pitfalls, ## Verification.

Authoring standards

description ≤ 60 characters, one sentence, ends with a period. State the capability, not the implementation. No marketing words.
Tools referenced in prose must be native Poirot tools (listed above) or MCP servers the skill explicitly expects. Do NOT name shell utilities the agent already has wrapped — grep → bash, cat/head/tail → read_file, sed/awk → str_replace, find/ls → list_dir.
Scripts go in scripts/, references in references/, templates in templates/ inside the skill directory. Don't expect the model to inline-write non-trivial logic every call — ship a helper script.
Keep the body focused: ~100 lines for a simple skill, ~200 for complex.

Show full SKILL.md (94 more words)Show less

Iteration loop

Draft SKILL.md
Install via /skill install <path> (or place under skills/)
Reload: /skill list should show it active
Run test prompts; observe whether the skill's guidance is followed
Revise frontmatter description for better triggering, body for clarity
Repeat

Pitfalls

Description too long → dilutes model attention when many skills loaded
Naming shell utilities instead of Poirot tools → model hallucinates calls to non-existent tools
No ## When to Use section → model triggers skill on wrong tasks
Frontmatter with unknown fields → parser may ignore silently; stick to the schema above

Files

Just SKILL.md in poirot/backend/agents/skill/builtin_skills/core/skill-creator of HezaoHezao/poirot.

Open the folder on GitHubat commit 86bf279

Compare with similar skills

Skill Creator 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 Creator compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Skill Creator this skillHezaoHezao/poirot	249	—	~838	Automated safety check: Pass	MIT	2 mo ago
Darwin Skill Optimizeralchaincyf/darwin-skill	6.2k	1 repos	~4.7k	Automated safety check: Pass	MIT	21 days ago
Skill Release Gaterohitg00/ai-engineering-from-scratch	66k	—	~1k	Automated safety check: Pass	MIT	today
Open-Science Skill Creatoraipoch/open-science	5.5k	—	~1.7k	Automated safety check: Pass	Apache-2.0	today
Skill JudgeshareAI-lab/Kode-CLI	5.2k	4 repos	~7.5k	Automated safety check: Pass	Apache-2.0	today
Skill Quality ReviewerGalaxy-Dawn/claude-scholar	5.7k	1 repos	~3k	Automated safety check: Pass	MIT	16 days ago

Similar skills

Darwin Skill Optimizer
alchaincyf/darwin-skill
Scores SKILL.md files on a nine-dimension rubric, then improves them in a keep-or-revert loop with independent judge agents, test prompts, git history and human checkpoints.
6.2k GitHub starsUsed in 1 repo~4.7k tokens
Agent WorkflowsAuto-check passed
Skill Release Gate
rohitg00/ai-engineering-from-scratch
Evaluates an Agent Skill bundle before release for structure, trigger quality, artifact improvement, script correctness, safety, installed-tree integrity and host portability.
66k GitHub stars~1k tokensUpdated today
Agent WorkflowsAuto-check passed
Open-Science Skill Creator
aipoch/open-science
Creates, revises, evaluates and publishes skills in the Open-Science app through its native host.skills composer, with optional test prompts and benchmarks.
5.5k GitHub stars~1.7k tokensUpdated today
Agent WorkflowsAuto-check passed
Skill Judge
shareAI-lab/Kode-CLI
Evaluates the design quality of an agent skill against official specifications and patterns from existing examples, scoring it and suggesting improvements.
5.2k GitHub starsUsed in 4 repos~7.5k tokens
Agent WorkflowsAuto-check passed
Skill Quality Reviewer
Galaxy-Dawn/claude-scholar
Scores a skill across description, content organization, writing style and structure, then produces letter grades and a prioritized improvement plan.
5.7k GitHub starsUsed in 1 repo~3k tokens
Agent WorkflowsAuto-check passed
OpenCode Skill Creator
antongulin/opencode-skill-creator
Walks you through drafting, testing, evaluating and tuning a skill for OpenCode, from an intake interview to description optimization.
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Questions about Skill Creator

What does Skill Creator do?

Create, edit, and evaluate agent skills iteratively. An agent skill from HezaoHezao/poirot. Skill Creator is an agent skill from HezaoHezao/poirot. Create, edit, and evaluate agent skills iteratively.

When should I use Skill Creator?

Skill Creator fits situations like: tasks that involve Skill authoring; tasks that involve Agent evaluation and testing.

How do I install Skill Creator in Claude Code?

Run `npx skills add HezaoHezao/poirot --skill skill-creator -a claude-code`. Or copy the skill folder (poirot/backend/agents/skill/builtin_skills/core/skill-creator in HezaoHezao/poirot) into .claude/skills/skill-creator in your project. Claude Code loads it when a task matches its description.

How do I install Skill Creator in Codex?

Run `npx skills add HezaoHezao/poirot --skill skill-creator -a codex`. Or copy the skill folder (poirot/backend/agents/skill/builtin_skills/core/skill-creator in HezaoHezao/poirot) into .agents/skills/skill-creator in your project. Codex loads it when a task matches its description.

Can I use Skill Creator 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 HezaoHezao/poirot --skill skill-creator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/skill-creator, .gemini/skills/skill-creator, .github/skills/skill-creator and .opencode/skills/skill-creator in your project.

What does Skill Creator need to run?

SKILL.md names no scripts, command-line tools or credentials: Skill Creator is instructions for the agent only. Its frontmatter pre-approves these tools: write_file, str_replace, read_file, list_dir.

Does Skill Creator 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 Skill Creator 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 Skill Creator use?

Skill Creator is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Skill Creator use?

About 838 tokens (SKILL.md is roughly 3.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Skill Creator?

Skills that share tags, products or a category with Skill Creator: Darwin Skill Optimizer (alchaincyf/darwin-skill, 6.2k stars), Skill Release Gate (rohitg00/ai-engineering-from-scratch, 66k stars), Open-Science Skill Creator (aipoch/open-science, 5.5k stars) and Skill Judge (shareAI-lab/Kode-CLI, 5.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Skill Creator?

HezaoHezao (a GitHub user) maintains it in HezaoHezao/poirot, which has 249 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on July 28, 2026.

Source: HezaoHezao/poirot on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Skill Creator

Install Skill Creator

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Skill Creator

Poirot skill format

Authoring standards

Iteration loop

Pitfalls

Files

Compare with similar skills

Similar skills

Darwin Skill Optimizer

Skill Release Gate

Open-Science Skill Creator

Skill Judge

Skill Quality Reviewer

OpenCode Skill Creator

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Code Documentation

Questions about Skill Creator

Install Skill Creator

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Skill Creator

Poirot skill format

Authoring standards

Iteration loop

Pitfalls

Files

Compare with similar skills

Similar skills

More from HezaoHezao/poirot

Related

Questions about Skill Creator