About
The `summarize` skill extracts and summarizes content from URLs, local files, and YouTube videos via CLI. It can generate summaries or full transcripts, particularly useful for articles, videos, and podcasts. Developers need the `summarize` binary installed to use this skill within Claude.
Quick Install
Claude Code
Recommendednpx skills add swarmclawai/swarmclaw -a claude-code/plugin add https://github.com/swarmclawai/swarmclawgit clone https://github.com/swarmclawai/swarmclaw.git ~/.claude/skills/summarizeCopy and paste this command in Claude Code to install this skill
Documentation
Summarize
Fast CLI to summarize URLs, local files, and YouTube links.
Quick Start
summarize "https://example.com" --model google/gemini-3-flash-preview
summarize "/path/to/file.pdf" --model google/gemini-3-flash-preview
summarize "https://youtu.be/dQw4w9WgXcQ" --youtube auto
YouTube: Summary vs Transcript
Best-effort transcript extraction (URLs only):
summarize "https://youtu.be/dQw4w9WgXcQ" --youtube auto --extract-only
If the user asked for a transcript but it's very long, return a tight summary first, then ask which section or time range to expand.
Model + Keys
Set the API key for your chosen provider:
- OpenAI:
OPENAI_API_KEY - Anthropic:
ANTHROPIC_API_KEY - xAI:
XAI_API_KEY - Google:
GEMINI_API_KEY(aliases:GOOGLE_GENERATIVE_AI_API_KEY,GOOGLE_API_KEY)
Default model is google/gemini-3-flash-preview if none is set.
Useful Flags
--length short|medium|long|xl|xxl|<chars>— control summary length--max-output-tokens <count>— hard token limit--extract-only— extract raw text without summarizing (URLs only)--json— machine-readable output--firecrawl auto|off|always— fallback extraction for blocked sites--youtube auto— Apify fallback ifAPIFY_API_TOKENis set
Config
Optional config file: ~/.summarize/config.json
{ "model": "openai/gpt-5.2" }
Optional services:
FIRECRAWL_API_KEYfor blocked sitesAPIFY_API_TOKENfor YouTube fallback
GitHub Repository
Frequently asked questions
What is the summarize skill?
summarize is a Claude Skill by swarmclawai. Skills package instructions and resources that Claude loads on demand, so Claude can perform summarize-related tasks without extra prompting.
How do I install summarize?
Use the install commands on this page: add summarize to Claude Code as a plugin, or clone its repository into your skills directory, then restart Claude so it picks up the skill.
What category does summarize belong to?
summarize is in the Design category, tagged general.
Is summarize free to use?
Yes. summarize is listed on AIMCP and free to install. It runs inside Claude, so no separate service account is required to use the skill itself.
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