ClaudeBuilt-in
Claude
Built-in
Skill ID
pptxName
PowerPoint
Pre-built Agent Skill available on claude.ai and the Claude API.
Purpose
Create presentations, edit slides, and analyze presentation content.
A sourced list of official Claude built-in skills, Anthropic repo skills, ChatGPT default skills, and OpenAI Codex catalog entries.
A clean, sourced index of every official Claude Agent Skill and ChatGPT/OpenAI Codex skillcurrently published by Anthropic and OpenAI. Each row links straight to the skill's SKILL.md on GitHub, so you can read or copy the source before installing.
Skills are reusable, file-based prompts with frontmatter that describe when Claude or Codex should invoke them. Five categories are tracked here: Claude built-in (PDF, Word, Excel, PowerPoint), Anthropic official repo examples, the ChatGPT default skill, OpenAI Codex system skills (auto-installed with the Codex CLI), and Codex curated skills (installable by name).
Use the filter below to narrow by source or provider, search by skill ID, or browse the full list. Anthropic's and OpenAI's repos are the upstream sources — this page just makes them easier to scan.
Showing 65 skills
Entries are sourced from Anthropic's skills docs and repo, OpenAI Help, and OpenAI's skills repo.
Skill ID
pptxName
Pre-built Agent Skill available on claude.ai and the Claude API.
Purpose
Create presentations, edit slides, and analyze presentation content.
Skill ID
xlsxName
Pre-built Agent Skill available on claude.ai and the Claude API.
Purpose
Create spreadsheets, analyze data, and generate reports with charts.
Skill ID
docxName
Pre-built Agent Skill available on claude.ai and the Claude API.
Purpose
Create documents, edit content, and format text.
Skill ID
pdfName
Pre-built Agent Skill available on claude.ai and the Claude API.
Purpose
Generate formatted PDF documents and reports.
Skill ID
algorithmic-artName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
brand-guidelinesName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
canvas-designName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
claude-apiName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
doc-coauthoringName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
docxName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
frontend-designName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
internal-commsName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
mcp-builderName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
pdfName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
pptxName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Skill ID
skill-creatorName
Repository skills are official examples/reference skills, not all built-in Claude skills.
Purpose
Official Anthropic public repository skill example or reference workflow.
Showing 1-16 of 65 skills
Quick answers about Claude Agent Skills, OpenAI Codex skills, and how this directory is sourced.
Claude Agent Skills are reusable, file-based prompts and tool configurations that extend Claude with specialized knowledge and workflows. Each skill is a SKILL.md file with frontmatter (name, description, when-to-use triggers) and instructions Claude follows when the skill is invoked.
Claude skills are SKILL.md files used by Claude (claude.ai, the API, and Claude Code). ChatGPT/OpenAI Codex skills follow a similar SKILL.md format but live in OpenAI's openai/skills repo and are loaded by the Codex CLI. Both formats describe a triggerable workflow, but they target different runtimes.
Drop the skill folder (containing SKILL.md and any referenced files) into your .claude/skills/ directory at the user or project level. Claude Code picks it up automatically and triggers it when its description matches your request.
Yes. Every skill listed here is published openly by Anthropic or OpenAI in their public GitHub repositories. The links go straight to the SKILL.md source so you can read or copy the skill before installing.
Built-in skills (PDF, Word, Excel, PowerPoint) ship inside Claude itself and require no installation. Anthropic repo skills are reference examples in the anthropics/skills repo. Codex system skills auto-install with the Codex CLI. Codex curated skills are optional and installable by name with the Codex skill installer.
Yes. The skill-creator skill (available in both Anthropic's repo and OpenAI's Codex system skills) walks you through authoring a SKILL.md, including frontmatter conventions and triggering patterns.
I can turn repeatable product, engineering, or content workflows into structured AI capabilities that fit directly into your stack.