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Agent skill

Claude Desktop MCP App

by yangtaihong59 in yangtaihong59/siyuan-plugins-mcp-sisyphus

Configure, repair, and verify MCP servers and MCP Apps in Claude Desktop on macOS.

MITAuto-check passedAgent Workflows

Install Claude Desktop MCP App

skills CLI
$ npx skills add yangtaihong59/siyuan-plugins-mcp-sisyphus --skill claude-desktop-mcp-app -a claude-code

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

GitHub CLI
$ gh skill install yangtaihong59/siyuan-plugins-mcp-sisyphus claude-desktop-mcp-app --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/yangtaihong59/siyuan-plugins-mcp-sisyphus.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/claude-desktop-mcp-app .claude/skills/claude-desktop-mcp-app && 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/

Facts

Skill name
claude-desktop-mcp-app
GitHub stars
116
Token cost
~1.2k tokens
SKILL.md length
591 words
Files
2
Skills in repo
30
Repo updated
First seen
Licence
MIT

At a glance

Configure, repair, and verify MCP servers and MCP Apps in Claude Desktop on macOS.

  • Works in 6 steps: The selected configuration file is the… → The JSON is valid and the server key is… → npx is executable from Claude's… → …
  • Streamable HTTP MCP endpoint to Claude Desktop through mcp-remote
  • SKILL.md covers Gather connection details, Locate the active Claude…, Merge the MCP server entry and Restart and verify the…, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Claude Desktop MCP App is an agent skill from yangtaihong59/siyuan-plugins-mcp-sisyphus. Configure, repair, and verify MCP servers and MCP Apps in Claude Desktop on macOS. Use when adding an HTTP or Streamable HTTP MCP endpoint to Claude Desktop through mcp-remote, locating the active claudedesktopconfig.json, preserving existing MCP configuration, diagnosing a server that is not running, or checking whether an MCP App renders interactively in Claude Code or Cowork.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Agent Workflows, covering MCP servers. It works with Model Context Protocol and macOS. The repository describes itself as: 一个用于连接Agent与Siyuan的工具. The licence is MIT.

When your agent uses it

  • Streamable HTTP MCP endpoint to Claude Desktop through mcp-remote
  • Locating the active claudedesktopconfig.json
  • Preserving existing MCP configuration
  • Diagnosing a server that is not running

Example prompts

  • “/claude-desktop-mcp-app”

Workflow steps

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

  1. The selected configuration file is the active one.
  2. The JSON is valid and the server key is under mcpServers.
  3. npx is executable from Claude's environment.
  4. mcp-remote can reach the endpoint.
  5. The SiYuan plugin and its MCP HTTP service are running on the configured port.
  6. Required authentication headers or tokens are present without being logged.

What it can do on your machine

Read from SKILL.md and the folder at commit d2ad534. 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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash and json).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    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

Claude Desktop MCP App loads about 1.2k tokens when it runs. Until then it costs about 102 tokens; SKILL.md has 591 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~102
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

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 yangtaihong59/siyuan-plugins-mcp-sisyphus at commit d2ad534, republished under its MIT licence (© yangtaihong59). 591 words, ~1,221 tokens.

Download SKILL.mdSave it as .claude/skills/claude-desktop-mcp-app/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
claude-desktop-mcp-app
description
Configure, repair, and verify MCP servers and MCP Apps in Claude Desktop on macOS. Use when adding an HTTP or Streamable HTTP MCP endpoint to Claude Desktop through mcp-remote, locating the active claude_desktop_config.json, preserving existing MCP configuration, diagnosing a server that is not running, or checking whether an MCP App renders interactively in Claude Code or Cowork.

Configure Claude Desktop MCP Apps

Configure the active Claude Desktop installation safely, then verify the transport, tools, and interactive MCP App separately. Treat a connected server and a rendered MCP App as two different success criteria.

Gather connection details

Obtain:

  • MCP endpoint URL, such as http://127.0.0.1:36806/mcp
  • Server name to place under mcpServers
  • Authentication requirements, if any
  • At least one read-only tool call for verification
  • An MCP App resource or tool that returns text/html;profile=mcp-app

Confirm the MCP service is already running before editing Claude. Do not expose tokens in terminal output, screenshots, logs, or the final response.

Locate the active Claude configuration

Prefer Claude Desktop's Settings → Developer → Edit Config action because it targets the configuration used by that installation.

When inspecting from the terminal, search before assuming the directory name:

bash
find "$HOME/Library/Application Support" -maxdepth 2 \
  -name claude_desktop_config.json -print

Common locations include:

  • ~/Library/Application Support/Claude/claude_desktop_config.json
  • ~/Library/Application Support/Claude-3p/claude_desktop_config.json

The Sisyphus setup observed Claude-3p; do not blindly write to the more familiar Claude directory. If multiple files exist, correlate the path with Edit Config, the running app, or its Developer settings.

Merge the MCP server entry

Read and parse the existing JSON first. Preserve unrelated top-level keys and existing mcpServers. Create a recoverable backup before changing a live user configuration. Request permission before writing outside the current workspace.

For a local Streamable HTTP Sisyphus server, merge this entry:

json
{
  "mcpServers": {
    "siyuan-sisyphus": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote@latest",
        "http://127.0.0.1:36806/mcp"
      ]
    }
  }
}

Use the snippet as a merge fragment, not as a replacement for the whole file. Validate the final file as JSON after editing.

Use mcp-remote@latest while testing a newly implemented protocol if necessary. Pin a verified version later when reproducibility matters. If Claude reports that npx cannot be launched, resolve npx in an interactive shell and use its absolute path because GUI applications may inherit a narrower PATH.

Restart and verify the connection

Fully quit Claude Desktop and reopen it; closing a window may leave the process running. Open Settings → Developer and check that the configured server reports running.

If it does not run, inspect Claude's MCP logs and check, in order:

  1. The selected configuration file is the active one.
  2. The JSON is valid and the server key is under mcpServers.
  3. npx is executable from Claude's environment.
  4. mcp-remote can reach the endpoint.
  5. The SiYuan plugin and its MCP HTTP service are running on the configured port.
  6. Required authentication headers or tokens are present without being logged.

Do not treat running as proof that an MCP App can render.

Show full SKILL.md (192 more words)Show less

Verify tools and the MCP App separately

First invoke a harmless, read-only MCP tool. This establishes that discovery and tool calls work independently of the UI extension.

Then ask Claude to open a known MCP App, such as the Sisyphus flashcard app. Check both host modes when relevant:

  • Claude Code may successfully call the MCP tool but present only text or a plain table.
  • Claude Cowork can render the MCP App as an interactive iframe when the returned resource and MIME type are supported.

For Sisyphus, useful application resources include:

  • Flashcard: ui://siyuan-sisyphus/flashcard
  • Timeline: ui://siyuan-sisyphus/timeline
  • Mascot shop: ui://siyuan-sisyphus/shop

A successful end-to-end result requires all of the following:

  1. Developer settings show the MCP server as running.
  2. A read-only Sisyphus tool call returns valid data.
  3. Cowork displays the chosen app as interactive UI rather than only serialized text.
  4. No test action mutates notes, reviews cards, or buys an item unless the user explicitly requested it.

Report the result

State the active configuration path, server status, tool-call result, host mode used for the App test, and whether interactive rendering succeeded. Redact credentials and avoid reproducing unrelated contents from the user's Claude configuration.

© yangtaihong59, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in .agents/skills/claude-desktop-mcp-app of yangtaihong59/siyuan-plugins-mcp-sisyphus.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit d2ad534

Compare with similar skills

Claude Desktop MCP App 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.

Claude Desktop MCP App compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Claude Desktop MCP App this skillyangtaihong59/siyuan-plugins-mcp-sisyphus116—~1.2kAutomated safety check: PassMIT
Binggo MCPluovicter-collab/bilibinggo388—~1.2kAutomated safety check: PassProprietary
Cortex Mem MCPsopaco/cortex-mem313—~2.8kAutomated safety check: PassMIT
Mps Project ManagementJetBrains/MPS1.7k—~2.2kAutomated safety check: PassApache-2.0
Premiere Pro MCPhetpatel-11/Adobe_Premiere_Pro_MCP669—~1.3kAutomated safety check: PassMIT
Gearcoleco Romhackingdrhelius/Gearcoleco142—~3.9kAutomated safety check: PassGPL-3.0

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Works with

Categories

Questions about Claude Desktop MCP App

What does Claude Desktop MCP App do?

Configure, repair, and verify MCP servers and MCP Apps in Claude Desktop on macOS. Claude Desktop MCP App is an agent skill from yangtaihong59/siyuan-plugins-mcp-sisyphus. Configure, repair, and verify MCP servers and MCP Apps in Claude Desktop on macOS.

When should I use Claude Desktop MCP App?

Claude Desktop MCP App fits situations like: streamable HTTP MCP endpoint to Claude Desktop through mcp-remote; locating the active claudedesktopconfig.json; preserving existing MCP configuration; diagnosing a server that is not running.

How do I install Claude Desktop MCP App in Claude Code?

Run `npx skills add yangtaihong59/siyuan-plugins-mcp-sisyphus --skill claude-desktop-mcp-app -a claude-code`. Or copy the skill folder (.agents/skills/claude-desktop-mcp-app in yangtaihong59/siyuan-plugins-mcp-sisyphus) into .claude/skills/claude-desktop-mcp-app in your project. Claude Code loads it when a task matches its description.

How do I install Claude Desktop MCP App in Codex?

Run `npx skills add yangtaihong59/siyuan-plugins-mcp-sisyphus --skill claude-desktop-mcp-app -a codex`. Or copy the skill folder (.agents/skills/claude-desktop-mcp-app in yangtaihong59/siyuan-plugins-mcp-sisyphus) into .agents/skills/claude-desktop-mcp-app in your project. Codex loads it when a task matches its description.

Can I use Claude Desktop MCP App 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 yangtaihong59/siyuan-plugins-mcp-sisyphus --skill claude-desktop-mcp-app -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/claude-desktop-mcp-app, .gemini/skills/claude-desktop-mcp-app, .github/skills/claude-desktop-mcp-app and .opencode/skills/claude-desktop-mcp-app in your project.

What does Claude Desktop MCP App need to run?

SKILL.md names no scripts, command-line tools or credentials: Claude Desktop MCP App is instructions for the agent only.

Does Claude Desktop MCP App access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Claude Desktop MCP App 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 Claude Desktop MCP App use?

Claude Desktop MCP App 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 Claude Desktop MCP App use?

About 1.2k tokens (SKILL.md is roughly 4.9k 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 Claude Desktop MCP App?

Skills that share tags, products or a category with Claude Desktop MCP App: Binggo MCP (luovicter-collab/bilibinggo, 388 stars), Cortex Mem MCP (sopaco/cortex-mem, 313 stars), Mps Project Management (JetBrains/MPS, 1.7k stars) and Premiere Pro MCP (hetpatel-11/Adobe_Premiere_Pro_MCP, 669 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Claude Desktop MCP App?

yangtaihong59 (a GitHub user) maintains it in yangtaihong59/siyuan-plugins-mcp-sisyphus, which has 116 GitHub stars. The repository holds 30 skills in this directory. The repository was last updated on October 8, 2026.

Source: yangtaihong59/siyuan-plugins-mcp-sisyphus on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.