Agent skill

Summarize

Fetch a URL or convert a local file (PDF/DOCX/HTML/etc.) into Markdown using uvx markitdown, optionally it can summarize

Apache-2.0Auto-check passedDocuments & Office

Install Summarize

skills CLI

$ npx skills add mitsuhiko/agent-stuff --skill summarize -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install mitsuhiko/agent-stuff summarize --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/mitsuhiko/agent-stuff.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/summarize .claude/skills/summarize && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "summarize" agent skill from https://github.com/mitsuhiko/agent-stuff/tree/main/skills/summarize into .claude/skills/summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "summarize", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/mitsuhiko/agent-stuff/tree/main/skills/summarize

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add mitsuhiko/agent-stuff --skill summarize -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install mitsuhiko/agent-stuff summarize --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mitsuhiko/agent-stuff.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/summarize .agents/skills/summarize && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "summarize" agent skill from https://github.com/mitsuhiko/agent-stuff/tree/main/skills/summarize into .agents/skills/summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "summarize", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mitsuhiko/agent-stuff --skill summarize -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install mitsuhiko/agent-stuff summarize --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mitsuhiko/agent-stuff.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/summarize .cursor/skills/summarize && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "summarize" agent skill from https://github.com/mitsuhiko/agent-stuff/tree/main/skills/summarize into .cursor/skills/summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "summarize", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/mitsuhiko/agent-stuff.git --path skills/summarize

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add mitsuhiko/agent-stuff --skill summarize -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install mitsuhiko/agent-stuff summarize --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mitsuhiko/agent-stuff.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/summarize .gemini/skills/summarize && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "summarize" agent skill from https://github.com/mitsuhiko/agent-stuff/tree/main/skills/summarize into .gemini/skills/summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "summarize", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install mitsuhiko/agent-stuff summarize

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add mitsuhiko/agent-stuff --skill summarize -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/mitsuhiko/agent-stuff.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/summarize .github/skills/summarize && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "summarize" agent skill from https://github.com/mitsuhiko/agent-stuff/tree/main/skills/summarize into .github/skills/summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "summarize", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add mitsuhiko/agent-stuff --skill summarize -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install mitsuhiko/agent-stuff summarize --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/mitsuhiko/agent-stuff.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/summarize .opencode/skills/summarize && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "summarize" agent skill from https://github.com/mitsuhiko/agent-stuff/tree/main/skills/summarize into .opencode/skills/summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "summarize", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: summarize
GitHub stars: 3.2k
Token cost: ~524 tokens
SKILL.md length: 231 words
Files: 2
Skills in repo: 16
Repo updated: Sep 27, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Fetch a URL or convert a local file (PDF/DOCX/HTML/etc.) into Markdown using uvx markitdown, optionally it can summarize

Works in 3 steps: convert to Markdown via uvx --from… → write the full Markdown to a temp .md… → run pi --model claude-haiku-4-5…
Tasks that involve Document parsing
SKILL.md covers When to use and Quick usage
Runs JavaScript scripts from its folder; calls uvx and node

What it does

Summarize is an agent skill from mitsuhiko/agent-stuff. Fetch a URL or convert a local file (PDF/DOCX/HTML/etc.) into Markdown using uvx markitdown, optionally it can summarize

Its SKILL.md is about 520 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.

It sits in Documents & Office, covering Document parsing, Word documents and Markdown. It works with MarkItDown and Microsoft Word. The repository describes itself as: These are commands I use with agents, mostly Claude. The licence is Apache-2.0.

When your agent uses it

Tasks that involve Document parsing
Tasks that involve Word documents
Tasks that involve Markdown

Example prompts

“/summarize”

Requirements

Node.js

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

convert to Markdown via uvx --from 'markitdown[pdf]' markitdown
write the full Markdown to a temp .md file and print its path as a "Hint" line
run pi --model claude-haiku-4-5 (no-tools, no-session) to summarize using your extra prompt

What it can do on your machine

Read from SKILL.md and the folder at commit 0865c84. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships script files (JavaScript), which the agent can run.
Shell commands in SKILL.md call:
- uvx
- node
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uvx, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Summarize loads about 524 tokens when it runs. Until then it costs about 33 tokens; SKILL.md has 231 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~33
When it runs · the whole SKILL.md, loaded when a task matches: ~524

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mitsuhiko/agent-stuff at commit 0865c84, republished under its Apache-2.0 licence (© mitsuhiko). 231 words, ~524 tokens.

Download SKILL.mdSave it as .claude/skills/summarize/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: summarize
description: Fetch a URL or convert a local file (PDF/DOCX/HTML/etc.) into Markdown using `uvx markitdown`, optionally it can summarize

Turn “things” (URLs, PDFs, Word docs, PowerPoints, HTML pages, text files, etc.) into Markdown so they can be inspected/quoted/processed like normal text.

markitdown can fetch URLs by itself; this skill mainly wraps it to make saving + summarizing convenient. For PDF inputs, use the markitdown[pdf] extra (or the wrapper below, which now does this automatically).

When to use

Use this skill when you need to:

pull down a web page as a document-like Markdown representation
convert binary docs (PDF/DOCX/PPTX) into Markdown for analysis
quickly produce a short summary of a long document before deeper work

Quick usage

Convert a URL or file to Markdown

Run from this skill folder (the agent should cd here first):

bash

uvx --from 'markitdown[pdf]' markitdown <url-or-path>

To write Markdown to a temp file (prints the path) use the wrapper:

bash

node to-markdown.mjs <url-or-path> --tmp

Tip: when summarizing, the script will always write the full converted Markdown to a temp .md file and will always print a final "Hint" line with the path (so you can open/inspect the full content).

Write Markdown to a specific file:

bash

uvx --from 'markitdown[pdf]' markitdown <url-or-path> > /tmp/doc.md

Convert + summarize with haiku-4-5 (pass context!)

Summaries are only useful when you provide what you want extracted and the audience/purpose.

bash

node to-markdown.mjs <url-or-path> --summary --prompt "Summarize focusing on X, for audience Y. Extract Z."

Or:

bash

node to-markdown.mjs <url-or-path> --summary --prompt "Focus on security implications and action items."

This will:

convert to Markdown via uvx --from 'markitdown[pdf]' markitdown
write the full Markdown to a temp .md file and print its path as a "Hint" line
run pi --model claude-haiku-4-5 (no-tools, no-session) to summarize using your extra prompt

Files

SKILL.md and 1 other file in skills/summarize of mitsuhiko/agent-stuff.

SKILL.md
to-markdown.mjs

Open the folder on GitHubat commit 0865c84

Compare with similar skills

Summarize next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Summarize compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Summarize this skillmitsuhiko/agent-stuff	3.2k	—	~524	Automated safety check: Pass	Apache-2.0	10 days ago
MarkitdownImCa0/just-laws	781	14 repos	~3.2k	Automated safety check: Notes	MIT	today
Doc To Markdowndaymade/claude-code-skills	1.4k	—	~2.5k	Automated safety check: Pass	MIT	today
Markdown ConverterTeam-Commonly/commonly	1.4k	—	~557	Automated safety check: Pass	Apache-2.0	today
Huashu Markdown Publishing Pipelinealchaincyf/huashu-md-html	908	—	~4.8k	Automated safety check: Pass	MIT	1 mo ago
Markitdownjimmc414/Kosmos	594	2 repos	~1.7k	Automated safety check: Pass	None	4 days ago

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Markitdown
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Works with

Questions about Summarize

What does Summarize do?

Fetch a URL or convert a local file (PDF/DOCX/HTML/etc.) into Markdown using uvx markitdown, optionally it can summarize. Summarize is an agent skill from mitsuhiko/agent-stuff.

When should I use Summarize?

Summarize fits situations like: tasks that involve Document parsing; tasks that involve Word documents; tasks that involve Markdown.

How do I install Summarize in Claude Code?

Run `npx skills add mitsuhiko/agent-stuff --skill summarize -a claude-code`. Or copy the skill folder (skills/summarize in mitsuhiko/agent-stuff) into .claude/skills/summarize in your project. Claude Code loads it when a task matches its description.

How do I install Summarize in Codex?

Run `npx skills add mitsuhiko/agent-stuff --skill summarize -a codex`. Or copy the skill folder (skills/summarize in mitsuhiko/agent-stuff) into .agents/skills/summarize in your project. Codex loads it when a task matches its description.

Can I use Summarize in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mitsuhiko/agent-stuff --skill summarize -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/summarize, .gemini/skills/summarize, .github/skills/summarize and .opencode/skills/summarize in your project.

What does Summarize need to run?

Going by SKILL.md and its folder, Summarize needs JavaScript for the scripts in its folder and the command-line tools its instructions call (uvx and node). Our summary lists: Node.js.

Does Summarize access the network?

SKILL.md contains no URLs. Its commands use uvx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Summarize safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Summarize use?

Summarize is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Summarize use?

About 524 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Summarize?

Skills that share tags, products or a category with Summarize: Markitdown (ImCa0/just-laws, 781 stars), Doc To Markdown (daymade/claude-code-skills, 1.4k stars), Markdown Converter (Team-Commonly/commonly, 1.4k stars) and Huashu Markdown Publishing Pipeline (alchaincyf/huashu-md-html, 908 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Summarize?

mitsuhiko (a GitHub user) maintains it in mitsuhiko/agent-stuff, which has 3,177 GitHub stars. The repository holds 16 skills in this directory. The repository was last updated on September 27, 2026.

Source: mitsuhiko/agent-stuff on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Summarize

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

When to use

Quick usage

Convert a URL or file to Markdown

Convert + summarize with haiku-4-5 (pass context!)

Files

Compare with similar skills

Similar skills

More from mitsuhiko/agent-stuff

Related

Questions about Summarize