Agent skill · writing content · sundial-org
summarize
Summarize URLs or files with the summarize CLI (web, PDFs, images, audio, YouTube).
Why this skill is useful
Adds specific commands and configurations for summarizing various content types that the AI wouldn't reliably generate on its own.
What it needs
Requires summarize installed locally. Requires anthropic, google, openai, xai account access. About 1k tokens when loaded. Last updated 2026-03-07. 639 stars on the source repository.
What this skill does
Summarize Fast CLI to summarize URLs, local files, and YouTube links. Quick start Model + keys Set the API key for your chosen provider: OpenAI: OPENAIAPIKEY Anthropic: ANTHROPICAPIKEY xAI: XAIAPIKEY Google: GEMINIAPIKEY (aliases: GOOGLEGENERATIVEAIAPIKEY, GOOGLEAPIKEY) Default model is google/gemini-3-flash-preview if none is set. Useful flags --length short medium long xl xxl <chars> --max-output-tokens <count> --extract-only (URLs only) --json (machine readable) --firecrawl auto off always (fallback extraction) --youtube auto (Apify fallback if APIFYAPITOKEN set) Config Optional config file: ~/.summarize/config.json Optional services: FIRECRAWLAPIKEY for blocked sites APIFYAPITOKEN for YouTube fallback
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills sundial-org/summarize