Agent skill

summarize

Summarize or extract text/transcripts from URLs, podcasts, and local files (great fallback for “transcribe this YouTube/video”).

View SKILL.md on GitHub Repository

Stars 39,160

Forks 6,840

Install this agent skill to your Project

npx add-skill https://github.com/HKUDS/nanobot/tree/main/nanobot/skills/summarize

Metadata

Additional technical details for this skill

nanobot: { "emoji": "\ud83e\uddfe", "install": [ { "id": "brew", "bins": [ "summarize" ], "kind": "brew", "label": "Install summarize (brew)", "formula": "steipete/tap/summarize" } ], "requires": { "bins": [ "summarize" ] } }

SKILL.md

Summarize

Fast CLI to summarize URLs, local files, and YouTube links.

When to use (trigger phrases)

Use this skill immediately when the user asks any of:

“use summarize.sh”
“what’s this link/video about?”
“summarize this URL/article”
“transcribe this YouTube/video” (best-effort transcript extraction; no yt-dlp needed)

Quick start

bash

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 (URLs only):

bash

summarize "https://youtu.be/dQw4w9WgXcQ" --youtube auto --extract-only

If the user asked for a transcript but it’s huge, return a tight summary first, then ask which section/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.