Clairvoyance

Name: Clairvoyance
Author: codybrom

by codybromversion 1.3.1i★ –iRuns in the cloud

Registry namefyi.clairvoyance/mcp

Install

Overview

Description from the maker (original English)

Software design skills for AI coding agents, inspired by A Philosophy of Software Design.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Developer tools

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://clairvoyance.fyi/mcp

Run this in your terminal

claude mcp add --transport http clairvoyance https://clairvoyance.fyi/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "clairvoyance": {
      "url": "https://clairvoyance.fyi/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "clairvoyance": {
      "type": "http",
      "url": "https://clairvoyance.fyi/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://clairvoyance.fyi/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain clairvoyance.fyi (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Developer toolsi

More stars than 0% of the other 4906 servers in this category
Published to the registry more recently than 58% of the other 4906 servers in this category
Basic checks equal to or better than 100% of the other 4906 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Clairvoyance safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.3.1) reached the registry 30 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: GitHub, Desktop Commander, Cloudflare MCP

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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by github

GitHub’s official server lets AI read and manage code, issues and pull requests in your account. Use GitHub’s hosted version or run it locally with Docker.

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Desktop Commander

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Cloudflare MCP

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Runs in the cloud★ 4,446Apache-2.0Updated 14 months ago

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Clairvoyance

AI agents can write working code, but they don't stop to consider effective design unless asked. Clairvoyance is a set of skills inspired by John Ousterhout's *A Philosophy of Software Design*. Each skill gives your agent extrasensory perspective around software design, with concrete tests to see ahead of obstacles during implementation and review.

How It Works

Skills activate automatically and push your agent to ask questions like:

*Does this interface hide real complexity, or just pass things through?*
*Can this method be understood without reading another one in a different file?*
*Is error handling pushing work onto callers that the module could handle itself?*

You can also invoke them directly. Use /clairvoyance:red-flags to trigger a design smell scan, /clairvoyance:deep-modules to check interface depth and /clairvoyance:design-it-twice to compare alternatives before committing. (On platforms that install the skills without the plugin namespace, such as skills.sh, drop the clairvoyance: prefix.)

Installation

Give your agent Clairvoyance: Claude Code, skills.sh, Codex, Cursor, OpenCode, Antigravity, Factory Droid, GitHub Copilot CLI, Kimi Code, Pi.

Note: Installation differs by platform. If you use more than one, install Clairvoyance separately for each.

Claude Code

/plugin marketplace add codybrom/clairvoyance

/plugin install clairvoyance@clairvoyance-plugins

skills.sh

npx skills add codybrom/clairvoyance --skill '*'

Codex

Requires Codex CLI ≥ 0.142.0 (codex --version). The Codex App and CLI share the same config, so this also makes Clairvoyance visible in the App's Plugins panel.

codex plugin marketplace add codybrom/clairvoyance

codex plugin add clairvoyance@clairvoyance

Older Codex versions only get the 16 skills, via a manual symlink — see .codex/INSTALL.md for that fallback and full troubleshooting.

Cursor

Cursor doesn't yet have a one-line "install from a GitHub URL" flow for unlisted plugins, so clone (or symlink) the repo into Cursor's local plugins folder and restart:

git clone https://github.com/codybrom/clairvoyance.git ~/.cursor/plugins/local/clairvoyance

Then check the Customize panel in the sidebar to confirm Clairvoyance and its 16 skills are listed.

OpenCode

Add Clairvoyance to the plugin array in your opencode.json (global or project-level):

"plugin": ["clairvoyance@git+https://github.com/codybrom/clairvoyance.git"] }

Restart OpenCode — no symlinks or manual skill paths needed. See .opencode/INSTALL.md for version pinning, troubleshooting, and migrating off the old symlink-based install.

Antigravity

agy plugin install https://github.com/codybrom/clairvoyance

Factory Droid

Droid translates Claude Code plugin format automatically — no Clairvoyance-specific files needed.

droid plugin marketplace add https://github.com/codybrom/clairvoyance

droid plugin install clairvoyance@clairvoyance-plugins

GitHub Copilot CLI

copilot plugin marketplace add codybrom/clairvoyance

copilot plugin install clairvoyance@clairvoyance-plugins

Kimi Code

In Kimi Code's plugin manager (/plugins), choose Custom, or run directly:

/plugins install https://github.com/codybrom/clairvoyance

Kimi Code will show a third-party trust prompt since this isn't an officially curated source — confirm to proceed.

Pi

pi install git:github.com/codybrom/clairvoyance

Pi auto-discovers the skills/ directory with no extra config.

llms.txt

Machine-readable skill index for LLM agents:

clairvoyance.fyi/llms.txt — table of contents with descriptions
clairvoyance.fyi/llms-full.txt — full content of all skills

MCP server

If your agent can't install plugins or skills but can connect to MCP servers, use Clairvoyance's read-only MCP server at https://clairvoyance.fyi/mcp (Streamable HTTP, no sign-in). Each skill is a tool with the same name and description it has in the plugin, and clients that support MCP prompts also offer each skill as a slash command. A request names only the skill, so the server never receives your code, file paths or prompts.

VS Code: code --add-mcp '{"name":"clairvoyance","type":"http","url":"https://clairvoyance.fyi/mcp"}'
Cursor: add "clairvoyance": { "url": "https://clairvoyance.fyi/mcp" } under "mcpServers" in ~/.cursor/mcp.json
Claude Code: claude mcp add --transport http clairvoyance https://clairvoyance.fyi/mcp
Codex: codex mcp add clairvoyance --url https://clairvoyance.fyi/mcp
Anything else: add https://clairvoyance.fyi/mcp as a remote (HTTP) MCP server.

It's listed in the official MCP Registry as fyi.clairvoyance/mcp. One-click buttons for VS Code and Cursor are on clairvoyance.fyi/install. Where your agent supports plugins or skills, install those instead: the plugin also enforces each skill's tool limits and runs the design-it-twice subagent itself.

What's Inside

Structure & Modules

Skill	Covers
`deep-modules`	Module depth, shallow modules, classitis, pass-through methods, interface vs implementation
`module-boundaries`	Merge vs split, conjoined methods, method splitting, dependency minimization
`information-hiding`	Information leakage, temporal decomposition, partial hiding, false encapsulation
`pull-complexity-down`	Caller burden, configuration parameters, the core asymmetry

Abstraction & Generality

Skill	Covers
`abstraction-quality`	Genuine vs false abstractions, layer boundaries, decorators
`general-vs-special`	Interface generality, special-general mixture, edge-case elimination
`error-design`	Define errors out of existence, exception masking, aggregation, just crash

Clarity & Communication

Skill	Covers
`naming-obviousness`	Isolation test, scope-length principle, consistency, avoid extra words
`comments-docs`	Comment types, comments-first workflow, cross-module documentation

Process & Evolution

Skill	Covers
`strategic-mindset`	Strategic vs tactical, investment rule, tactical tornado
`design-it-twice`	Generate alternatives, compare on criteria, synthesize
`code-evolution`	"Designed this way" standard, repetition, technical debt
`complexity-recognition`	Change amplification, cognitive load, unknown unknowns

Diagnostic

Skill	Covers
`red-flags`	Design smell scan covering structure, boundaries, documentation, naming, and process
`design-review`	Structured review funnel from complexity triage through structural, interface, and surface checks
`diagnose`	Routes a vague symptom or complaint to the most relevant skill via a decision tree

Attribution

These skills are adapted in part from the teachings of John Ousterhout, professor of computer science at Stanford University, and his book *A Philosophy of Software Design*. This project is not affiliated with, endorsed by, or sponsored by John Ousterhout, Stanford University, or the publishers of *A Philosophy of Software Design*.

If you find these skills useful, you should really buy and read the book. The skills in this repo are by no means a substitute for reading it. It is the definitive treatment of these ideas and an enjoyable read for any dev. Available from Amazon (no affiliate link). Also available in German (O'Reilly, 2021) and Chinese (Posts and Telecommunications Press, 2024).

The skills and code in this project are independently authored original works by the project's contributors. Brief quotations from the book are sometimes used with full attribution for purposes of commentary, criticism, and education. All trademarks and copyrights are the property of their respective owners.

Contributing

Contributions are welcome beyond the inspiration material, but should reinforce the core philosophy of thinking strategically about software design.

To contribute:

Fork the repository
Create a branch
Follow the writing-skills skill from Superpowers for creating and testing skills
Add your skill in skills/ /SKILL.md with optional references/ files
Commit your changes and submit a PR

Updating

Claude Code: /plugin update clairvoyance
skills.sh: npx skills update codybrom/clairvoyance
Codex: codex plugin marketplace upgrade clairvoyance && codex plugin add clairvoyance@clairvoyance
Cursor: cd ~/.cursor/plugins/local/clairvoyance && git pull, then restart
OpenCode: doesn't auto-refresh on restart unless you pinned a tag — see .opencode/INSTALL.md
Antigravity: re-run agy plugin install https://github.com/codybrom/clairvoyance
Factory Droid: droid plugin marketplace update clairvoyance-plugins && droid plugin update clairvoyance@clairvoyance-plugins
GitHub Copilot CLI: copilot plugin update clairvoyance
Kimi Code: re-run the install command from the Custom tab
Pi: pi update --extensions (re-run install with a new ref if you pinned one)
MCP server: always serves the latest skills, so there's nothing to update.
llms.txt: Always up to date at clairvoyance.fyi/llms-full.txt.

See CHANGELOG.md or the GitHub releases for what changed in each version.

Clairvoyance

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

GitHub

Desktop Commander

Cloudflare MCP

README from the maker

How It Works

Installation

Claude Code

skills.sh

Codex

Cursor

OpenCode

Antigravity

Factory Droid

GitHub Copilot CLI

Kimi Code

Pi

llms.txt

MCP server

What's Inside

Structure & Modules

Abstraction & Generality

Clarity & Communication

Process & Evolution

Diagnostic

Attribution

Contributing

Updating

License