MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Fetch a URL and return a concise markdown summary of its content.
Install Md Fetch Summarize
$ npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install HarnessMD/munder-difflin md-fetch-summarize --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/HarnessMD/munder-difflin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/resources/skills/md-fetch-summarize .claude/skills/md-fetch-summarize && rm -rf skills-srcUse ~/.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/
Install the "md-fetch-summarize" agent skill from https://github.com/HarnessMD/munder-difflin/tree/main/resources/skills/md-fetch-summarize into .claude/skills/md-fetch-summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "md-fetch-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 install https://github.com/HarnessMD/munder-difflin/tree/main/resources/skills/md-fetch-summarizeType 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.
$ npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install HarnessMD/munder-difflin md-fetch-summarize --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HarnessMD/munder-difflin.git skills-src && mkdir -p .agents/skills && cp -r skills-src/resources/skills/md-fetch-summarize .agents/skills/md-fetch-summarize && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "md-fetch-summarize" agent skill from https://github.com/HarnessMD/munder-difflin/tree/main/resources/skills/md-fetch-summarize into .agents/skills/md-fetch-summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "md-fetch-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.
$ npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install HarnessMD/munder-difflin md-fetch-summarize --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HarnessMD/munder-difflin.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/resources/skills/md-fetch-summarize .cursor/skills/md-fetch-summarize && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "md-fetch-summarize" agent skill from https://github.com/HarnessMD/munder-difflin/tree/main/resources/skills/md-fetch-summarize into .cursor/skills/md-fetch-summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "md-fetch-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 https://github.com/HarnessMD/munder-difflin.git --path resources/skills/md-fetch-summarize--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install HarnessMD/munder-difflin md-fetch-summarize --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HarnessMD/munder-difflin.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/resources/skills/md-fetch-summarize .gemini/skills/md-fetch-summarize && rm -rf skills-srcUse ~/.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/
Install the "md-fetch-summarize" agent skill from https://github.com/HarnessMD/munder-difflin/tree/main/resources/skills/md-fetch-summarize into .gemini/skills/md-fetch-summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "md-fetch-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.
$ gh skill install HarnessMD/munder-difflin md-fetch-summarizeInstalls 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).
$ npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/HarnessMD/munder-difflin.git skills-src && mkdir -p .github/skills && cp -r skills-src/resources/skills/md-fetch-summarize .github/skills/md-fetch-summarize && rm -rf skills-srcUse ~/.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/
Install the "md-fetch-summarize" agent skill from https://github.com/HarnessMD/munder-difflin/tree/main/resources/skills/md-fetch-summarize into .github/skills/md-fetch-summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "md-fetch-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.
$ npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install HarnessMD/munder-difflin md-fetch-summarize --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HarnessMD/munder-difflin.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/resources/skills/md-fetch-summarize .opencode/skills/md-fetch-summarize && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "md-fetch-summarize" agent skill from https://github.com/HarnessMD/munder-difflin/tree/main/resources/skills/md-fetch-summarize into .opencode/skills/md-fetch-summarize/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "md-fetch-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
md-fetch-summarize- GitHub stars
- 8.6k
- Token cost
- ~259 tokens
- SKILL.md length
- 88 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- MIT
At a glance
Fetch a URL and return a concise markdown summary of its content.
- Works in 3 steps: Fetch the page with WebFetch (or Bash… → Extract the main content — ignore nav,… → Return a structured summary with
- Asked to fetch and summarize
- Calls curl
- Summarize this URL
What it does
Md Fetch Summarize is an agent skill from HarnessMD/munder-difflin. Fetch a URL and return a concise markdown summary of its content. Read-only: no files are written; the summary is returned as output only. Use when asked to "fetch and summarize", "summarize this URL", "what does this page say", or "get the content of <url". Proactively suggest when the user pastes a URL and asks what it contains. (munder-difflin)
Its SKILL.md is about 260 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows. The repository describes itself as: an open-source alternative to the dots, bots and muses of the world, run an office of claude code/codex like agents on your laptop, sandboxes or anywhere, uses your existing…. The licence is MIT.
When your agent uses it
- Asked to fetch and summarize
- Summarize this URL
- What does this page say
- Get the content of <url
Example prompts
- “fetch and summarize”
- “summarize this URL”
- “what does this page say”
- “/md-fetch-summarize”
Requirements
- Pre-approved tools (allowed-tools): WebFetch, Bash
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Fetch the page with WebFetch (or Bash with curl -sL | head -200 as a fallback).
- Extract the main content — ignore nav, footer, ads, and boilerplate.
- Return a structured summary with
What it can do on your machine
Read from SKILL.md and the folder at commit 2c64612. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
WebFetchBash
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
curl
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use curl, 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
Md Fetch Summarize loads about 259 tokens when it runs. Until then it costs about 92 tokens; SKILL.md has 88 words of instructions outside code blocks.
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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: WebFetch, Bash
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 HarnessMD/munder-difflin at commit 2c64612, republished under its MIT licence (© HarnessMD). 88 words, ~259 tokens.
Download SKILL.mdSave it as
.claude/skills/md-fetch-summarize/SKILL.md (or your agent's skills folder).- name
- md-fetch-summarize
- description
- Fetch a URL and return a concise markdown summary of its content. Read-only: no files are written; the summary is returned as output only. Use when asked to "fetch and summarize", "summarize this URL", "what does this page say", or "get the content of <url>". Proactively suggest when the user pastes a URL and asks what it contains. (munder-difflin)
- allowed-tools
- WebFetch, Bash
- version
- 1.0.0
Fetch & Summarize
Given a URL, fetch its content and return a concise markdown summary.
Steps:
- Fetch the page with
WebFetch(orBashwithcurl -sL <url> | head -200as a fallback). - Extract the main content — ignore nav, footer, ads, and boilerplate.
- Return a structured summary with:
- Title (the page's
<title>or heading) - One-paragraph overview of what the page is about
- Key points as a bullet list (max 5)
- Source — the URL fetched
- Title (the page's
Do not save or write the fetched content anywhere. Return the summary directly.
© HarnessMD, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in resources/skills/md-fetch-summarize of HarnessMD/munder-difflin.
Open the folder on GitHubat commit 2c64612
Compare with similar skills
Md Fetch 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Md Fetch Summarize this skillHarnessMD/munder-difflin | 8.6k | — | ~259 | Automated safety check: Notes | MIT | |
| MCP Server Builderanthropics/skills | 180k | 63 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 35 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 297k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Skill CreatorAzure/azqr | 795 | 89 repos | ~8.2k | Automated safety check: Pass | Apache-2.0 |
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Related
Categories
Questions about Md Fetch Summarize
What does Md Fetch Summarize do?
Fetch a URL and return a concise markdown summary of its content. Md Fetch Summarize is an agent skill from HarnessMD/munder-difflin. Fetch a URL and return a concise markdown summary of its content.
When should I use Md Fetch Summarize?
Md Fetch Summarize fits situations like: asked to fetch and summarize; summarize this URL; what does this page say; get the content of <url.
How do I install Md Fetch Summarize in Claude Code?
Run `npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a claude-code`. Or copy the skill folder (resources/skills/md-fetch-summarize in HarnessMD/munder-difflin) into .claude/skills/md-fetch-summarize in your project. Claude Code loads it when a task matches its description.
How do I install Md Fetch Summarize in Codex?
Run `npx skills add HarnessMD/munder-difflin --skill md-fetch-summarize -a codex`. Or copy the skill folder (resources/skills/md-fetch-summarize in HarnessMD/munder-difflin) into .agents/skills/md-fetch-summarize in your project. Codex loads it when a task matches its description.
Can I use Md Fetch 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 HarnessMD/munder-difflin --skill md-fetch-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/md-fetch-summarize, .gemini/skills/md-fetch-summarize, .github/skills/md-fetch-summarize and .opencode/skills/md-fetch-summarize in your project.
What does Md Fetch Summarize need to run?
Going by SKILL.md and its folder, Md Fetch Summarize needs the command-line tools its instructions call (curl). Its frontmatter pre-approves these tools: WebFetch, Bash.
Does Md Fetch Summarize access the network?
SKILL.md contains no URLs. Its commands use curl, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Md Fetch Summarize safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Md Fetch Summarize use?
Md Fetch Summarize is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Md Fetch Summarize use?
About 259 tokens (SKILL.md is roughly 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 Md Fetch Summarize?
Skills that share tags, products or a category with Md Fetch Summarize: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 297k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Md Fetch Summarize?
HarnessMD (a GitHub organization) maintains it in HarnessMD/munder-difflin, which has 8,603 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 9, 2026.
Source: HarnessMD/munder-difflin on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.