New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Skill Creator

by HKUDS in HKUDS/OpenOPC

Create or update skills. An agent skill from HKUDS/OpenOPC.

MITAuto-check passedAgent Workflows

Install Skill Creator

skills CLI
$ npx skills add HKUDS/OpenOPC --skill skill-creator -a claude-code

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

GitHub CLI
$ gh skill install HKUDS/OpenOPC 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/HKUDS/OpenOPC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.opc/skills/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/

Facts

Skill name
skill-creator
GitHub stars
1.8k
Token cost
~980 tokens
SKILL.md length
411 words
Files
4 (incl. scripts)
Skills in repo
7
Repo updated
First seen
Licence
MIT

At a glance

Create or update skills. An agent skill from HKUDS/OpenOPC.

  • Works in 6 steps: Understand the skill with concrete… → Plan reusable contents → Initialize the skill → …
  • Packaging skills with scripts
  • SKILL.md covers About Skills, Core Principles, Naming and Skill Creation Process
  • Runs Python scripts from its folder; calls python3

What it does

Skill Creator is an agent skill from HKUDS/OpenOPC. Create or update skills. Use when designing, structuring, or packaging skills with scripts, references, and assets.

Its SKILL.md is about 980 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including scripts (for example `scripts/init_skill.py`, `scripts/package_skill.py` and `scripts/quick_validate.py`).

It sits in Agent Workflows, covering Skill authoring. The repository describes itself as: OpenOPC: Build Your Personal AI-Native Company — Self-Built, Self-Run, Self-Grown. The licence is MIT.

When your agent uses it

  • Packaging skills with scripts
  • Tasks that involve Skill authoring

Example prompts

  • “/skill-creator”

Requirements

  • Python 3

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Understand the skill with concrete examples
  2. Plan reusable contents
  3. Initialize the skill
  4. Edit the skill
  5. Package (optional)
  6. Iterate

What it can do on your machine

Read from SKILL.md and the folder at commit b14e85d. 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

    Ships 3 files in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python3

    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 980 tokens when it runs. Until then it costs about 32 tokens; SKILL.md has 411 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~32
When it runs · the whole SKILL.md, loaded when a task matches
~980

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); the scripts in this folder are not scanned.

SKILL.md

The full file from HKUDS/OpenOPC at commit b14e85d, republished under its MIT licence (© HKUDS). 411 words, ~980 tokens.

Download SKILL.mdSave it as .claude/skills/skill-creator/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
skill-creator
description
Create or update skills. Use when designing, structuring, or packaging skills with scripts, references, and assets.

Skill Creator

Guidance for creating effective skills.

About Skills

Skills are modular packages that extend agent capabilities with specialized knowledge, workflows, and tools. Each skill is a directory containing a SKILL.md file and optional bundled resources.

What Skills Provide
  1. Specialized workflows - Multi-step procedures for specific domains
  2. Tool integrations - Instructions for working with specific file formats or APIs
  3. Domain expertise - Project-specific knowledge, schemas, business logic
  4. Bundled resources - Scripts, references, and assets for complex and repetitive tasks
Skill Locations in OPC

OPC uses a two-level skill system:

LevelPathScope
System.opc/skills/<skill-name>/Shared across all projects
Project.opc/projects/<project_id>/skills/<skill-name>/Specific to one project

Project skills with the same name override system skills. When creating new skills from project experience, always use the project level.

How Skills Are Created

Skills enter the system through two paths:

  1. Agent-driven (this skill): You identify a pattern, read this guide, and create the skill manually using init_skill.py or file_write.
  2. Auto-promoted: The system automatically distills playbook skills from repeated project reflections (threshold: 2 reflections with recurring patterns). These are saved as <employee>-<role>-<domain>-playbook under the project skills directory.

Both paths produce the same <skill-name>/SKILL.md format. This guide covers the agent-driven path; auto-promoted skills follow the same naming and format conventions.

Core Principles

Concise is Key

The context window is shared. Only add context the agent doesn't already have. Prefer concise examples over verbose explanations.

Anatomy of a Skill
skill-name/
├── SKILL.md (required)
│   ├── YAML frontmatter (name, description required)
│   └── Markdown instructions
└── Bundled Resources (optional)
    ├── scripts/          - Executable code
    ├── references/       - Documentation loaded as needed
    └── assets/           - Files used in output
Show full SKILL.md (177 more words)Show less
Progressive Disclosure
  1. Metadata (name + description) - Always in context (~100 words)
  2. SKILL.md body - When agent reads the skill (<5k words)
  3. Bundled resources - As needed (scripts can be executed without reading into context)

Naming

All skills — whether agent-created or auto-promoted — must follow these conventions:

  • Lowercase letters, digits, and hyphens only (e.g., backend-api-playbook)
  • Under 64 characters
  • Directory name must match the name field in frontmatter

Skill Creation Process

Step 1: Understand the skill with concrete examples

Clarify use cases: what triggers this skill, what does it produce?

Step 2: Plan reusable contents

Identify what scripts, references, and assets would help.

Step 3: Initialize the skill

For project-specific skills, create under .opc/projects/<project_id>/skills/:

bash
python3 {baseDir}/scripts/init_skill.py <skill-name> --path .opc/projects/<project_id>/skills

Options: --resources scripts,references,assets and --examples.

Step 4: Edit the skill

Write SKILL.md with:

  • Frontmatter: name (hyphen-case, matches directory) and description (what it does + when to use it — this is the primary trigger for skill discovery)
  • Body: Instructions, examples, references to bundled resources
Step 5: Package (optional)
bash
python3 {baseDir}/scripts/package_skill.py <path/to/skill-folder>

Validates the skill then creates a distributable .skill zip file.

Step 6: Iterate

Test, notice struggles, improve SKILL.md and resources.

© HKUDS, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (scripts) in .opc/skills/skill-creator of HKUDS/OpenOPC.

  • SKILL.md
  • scripts/init_skill.py
  • scripts/package_skill.py
  • scripts/quick_validate.py

Open the folder on GitHubat commit b14e85d

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
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Skill Creator this skillHKUDS/OpenOPC1.8k—~980Automated safety check: PassMIT
Skill CreatorAzure/azqr79689 repos~8.2kAutomated safety check: PassApache-2.0
Claude Code Skill Developer Guidediet103/claude-code-infrastructure-showcase10k11 repos~3.5kAutomated safety check: PassMIT
Darwin Skill Optimizeralchaincyf/darwin-skill6.2k1 repos~4.7kAutomated safety check: PassMIT
Claude Code Command Developmentanthropics/claude-plugins-official38k10 repos~4.8kAutomated safety check: PassApache-2.0
Claude Code Plugin Structureanthropics/claude-plugins-official38k10 repos~3.4kAutomated safety check: PassApache-2.0

Similar skills

  • Skill Creator

    Azure/azqr

    Official

    Create new skills, modify and improve existing skills, and measure skill performance.

    796 GitHub starsUsed in 89 repos~8.2k tokens
    Agent WorkflowsAuto-check passed

  • Claude Code Skill Developer Guide

    diet103/claude-code-infrastructure-showcase

    A guide to creating and managing Claude Code skills with auto-activation: skill-rules.json triggers, hooks, enforcement levels, YAML frontmatter and progressive disclosure.

    10k GitHub starsUsed in 11 repos~3.5k tokens
    Agent WorkflowsAuto-check passed

  • 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

  • Claude Code Command Development

    anthropics/claude-plugins-official

    Official

    Explains how to write Claude Code slash commands: Markdown files with YAML frontmatter, arguments, file references, bash context and interactive prompts.

    38k GitHub starsUsed in 10 repos~4.8k tokens
    Agent WorkflowsAuto-check passed

  • Claude Code Plugin Structure

    anthropics/claude-plugins-official

    Official

    Explains the directory layout, plugin.json manifest and component organization of a Claude Code plugin, including auto-discovery and portable paths.

    38k GitHub starsUsed in 10 repos~3.4k 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

More from HKUDS/OpenOPC

  • Clawhub

    HKUDS/OpenOPC

    Search and install agent skills from ClawHub, the public skill registry.

    1.8k GitHub stars~467 tokensUpdated 29 days ago
    Auto-check passed

  • Skill Evolution

    HKUDS/OpenOPC

    Evolve new skills from project experience. An agent skill from HKUDS/OpenOPC.

    1.8k GitHub stars~641 tokensUpdated 29 days ago
    Auto-check passed

  • Collaboration Playbook

    HKUDS/OpenOPC

    Standing rules for how any role in an OpenOPC company coordinates with its peers — work-item discipline, messaging, meetings, and blocking collaboration.

    1.8k GitHub stars~1.6k tokensUpdated 29 days ago
    Auto-check passed

  • Opc Collab

    HKUDS/OpenOPC

    Collaborate with other agents in OpenOPC company mode via the opc-collab CLI — send messages, request user input, delegate work, read the manager board, respond in meetings, propose task adjustments.

    1.8k GitHub stars~3.8k tokensUpdated 29 days ago
    Auto-check passed

  • Cron

    HKUDS/OpenOPC

    Schedule reminders, recurring tasks, and one-time jobs using system crontab.

    1.8k GitHub stars~323 tokensUpdated 29 days ago
    Auto-check passed

  • Memory

    HKUDS/OpenOPC

    Manage durable global/project memory in .opc/memory/global.md and .opc/memory/projects/<currentprojectid.md.

    1.8k GitHub stars~304 tokensUpdated 29 days ago
    Auto-check passed

Categories

Questions about Skill Creator

What does Skill Creator do?

Create or update skills. An agent skill from HKUDS/OpenOPC. Skill Creator is an agent skill from HKUDS/OpenOPC. Create or update skills.

When should I use Skill Creator?

Skill Creator fits situations like: packaging skills with scripts; tasks that involve Skill authoring.

How do I install Skill Creator in Claude Code?

Run `npx skills add HKUDS/OpenOPC --skill skill-creator -a claude-code`. Or copy the skill folder (.opc/skills/skill-creator in HKUDS/OpenOPC) 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 HKUDS/OpenOPC --skill skill-creator -a codex`. Or copy the skill folder (.opc/skills/skill-creator in HKUDS/OpenOPC) 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 HKUDS/OpenOPC --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?

Going by SKILL.md and its folder, Skill Creator needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3.

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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Skill Creator use?

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

How many tokens does Skill Creator use?

About 980 tokens (SKILL.md is roughly 3.9k 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: Skill Creator (Azure/azqr, 796 stars), Claude Code Skill Developer Guide (diet103/claude-code-infrastructure-showcase, 10k stars), Darwin Skill Optimizer (alchaincyf/darwin-skill, 6.2k stars) and Claude Code Command Development (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Skill Creator?

HKUDS (a GitHub organization) maintains it in HKUDS/OpenOPC, which has 1,824 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on September 11, 2026.

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