A content-extraction guide for turning videos, podcasts, PDFs, images, and audio into text that an AI coding tool can use. It includes OCR, which means reading text from images or scanned documents.

Use it to extract YouTube transcripts, podcast text, PDF contents, text from scanned images, and audio or video transcripts from URLs or local files.

It avoids writing separate extraction scripts for each media type and provides cleaner text for analysis. This is useful when the source is not already available as plain text.

summarize — Skill for Claude Code and Codex by buildoak: A content-extraction guide for turning videos, podcasts, PDFs, images…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/buildoak/fieldwork-skills/summarize

Any agent

npx skills add buildoak/fieldwork-skills --skill summarize

Clone the repo

git clone --depth 1 https://github.com/buildoak/fieldwork-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/buildoak/fieldwork-skills/summarize.svg)](https://agentmods.dev/skills/buildoak/fieldwork-skills/summarize)

Your own site

<a href="https://agentmods.dev/skills/buildoak/fieldwork-skills/summarize"><img src="https://agentmods.dev/badge/skills/buildoak/fieldwork-skills/summarize.svg" alt="Measured on agentmods" height="20"></a>

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,353 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00031	$0.03353
Opus 5	$0.00015	$0.01677
Sonnet 5	$0.00006	$0.00671
Haiku 4.5	$0.00003	$0.00335

Measured 6d ago against content hash f63acffb9ca8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

summarize scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/summarize/SKILL.md · 346 lines

How it starts

The opening of the file, as written. The whole thing — 346 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Summarize

Extract clean text and media transcripts from URLs, files, and streams so your AI workflow can reason over reliable source content without hand-coding brittle scraper logic.

Use this skill when you need deterministic extraction for YouTube, podcast feeds, PDFs, scanned images, or local media files.

Terminology used in this file:

DOM: Document Object Model, the page element structure used by browser-based extractors.
OCR: Optical character recognition (extracting text from images/scans).
ANSI codes: Terminal color/control sequences; --plain removes them for machine parsing.

Setup

brew tap steipete/tap
brew install summarize

Claude Code: copy this skill folder into .claude/skills/summarize/
Codex CLI: append this SKILL.md content to your project's root AGENTS.md

For the full installation walkthrough (prerequisites, optional dependencies, verification, troubleshooting), see references/installation-guide.md.

Staying Updated

This skill ships with an UPDATES.md changelog and UPDATE-GUIDE.md for your AI agent.

After installing, tell your agent: "Check UPDATES.md in the summarize skill for any new features or changes."

When updating, tell your agent: "Read UPDATE-GUIDE.md and apply the latest changes from UPDATES.md."

Follow UPDATE-GUIDE.md so customized local files are diffed before any overwrite.

Quick Start

Run one extraction flow end-to-end:

summarize --version
summarize --extract "https://www.youtube.com/watch?v=VIDEO_ID" --plain
summarize --extract "/path/to/document.pdf" --plain

Use --extract --plain as the default pattern for deterministic, non-ANSI output.

Decision Tree: summarize vs Other Tools

Need content from the web?
  |
  +-- Static web page (article, docs, blog)?
  |     --> WebFetch (built-in, zero deps, faster)
  |     --> Jina r.jina.ai (zero install alternative)
  |     --> summarize ONLY if above tools fail or return garbage
  |
  +-- JS-heavy SPA / dynamic content?
  |     --> Crawl4AI crwl (full browser rendering)
  |     --> summarize will NOT help here (no JS rendering)
  |
  +-- Anti-bot / paywalled / Cloudflare-protected?
  |     --> summarize --firecrawl always (requires FIRECRAWL_API_KEY)
  |     --> browser-based workflow as fallback
  |
  +-- YouTube video?
  |     --> summarize --extract (ONLY option for transcript)
  |     --> Add --youtube web for captions-only (faster)
  |     --> Add --slides for visual slide extraction
  |
  +-- Podcast / RSS feed?
  |     --> summarize --extract (ONLY option)
  |     --> Supports Apple Podcasts, Spotify, RSS feeds, Podbean, etc.
  |
  +-- PDF (URL or local file)?
  |     --> summarize --extract (ONLY CLI option)
  |     --> Requires: uvx/markitdown (brew install uv)
  |
  +-- Image (OCR)?
  |     --> summarize --extract (ONLY CLI option)
  |     --> Requires: tesseract
  |
  +-- Audio / video file?
        --> summarize --extract (ONLY CLI option)
        --> Requires: whisper-cli (local) or OPENAI_API_KEY (cloud)

Read the full file on GitHub · 346 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

6d ago First seen · 346 lines · 31 tokens per session scan A f63acffb9ca8

Subscribe to this mod's changes

summarize is a skill published in the GitHub repository buildoak/fieldwork-skills (15 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 31 tokens to every session and 3,353 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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Generate professional PDF reports and presentations from structured content. Converts evaluations, proposals, and assessments into polished PDFs with tables, score visualizations, and styled sections. Use when: generate PDF, create report, export to PDF, make presentation, create proposal document, export evaluation.

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summarize