Guard

Name: Guard
Author: codapult

by codapultversion 0.14.1i★ 4iRuns on your computer

Registry nameio.github.codapult/guard

Install

Overview

Description from the maker (original English)

Local-first architecture guardrails and project context for JS/TS AI coding agents.

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 checksi2 of 2 passedChecked from public information; code not scanned yet
UsageiEarly↓ 882/wk · ★ 4

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 on your computer
Transport: stdio
Category: Developer tools

Install

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

Before you install

Basic checks: 2 of 2 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "guard": {
      "command": "npx",
      "args": [
        "-y",
        "@codapult/guard"
      ]
    }
  }
}

Run this in your terminal

claude mcp add guard -- npx -y @codapult/guard

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "guard": {
      "command": "npx",
      "args": [
        "-y",
        "@codapult/guard"
      ]
    }
  }
}

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": {
    "guard": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@codapult/guard"
      ]
    }
  }
}

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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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.

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 10, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account codapult, which owns the repo
✓ Pass
Still maintained
Code last changed today
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 82% of the other 5728 servers in this category
Published to the registry more recently than 96% of the other 5728 servers in this category
Basic checks equal to or better than 100% of the other 5728 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 Guard safe?

It passed 2 of 2 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 on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed today, and the latest version (0.14.1) reached the registry today.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: REA, Netdata, Front-End Checklist

Alternatives

Servers in the same category from other makers, sorted by stars.

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

REA

Reverse engineer anything from your terminal or agent with one CLI and MCP server.

by morlutoWidely used↓ 388.7K/wk★ 448.2KUpdated 16 days ago

Runs on your computer

Install

Netdata

Real-time infrastructure monitoring with metrics, logs, alerts, and ML-based anomaly detection.

by netdataWidely used★ 81.3KUpdated 6 days ago

Runs in the cloud

Install

Front-End Checklist

Review frontend code and live pages against 386 quality-gated web development rules.

by thedaviddiasWidely used★ 74.7KUpdated 37 days ago

Runs in the cloud

Install

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.

@codapult/guard

Architecture guardrails for AI-assisted development

Codapult Guard helps teams preserve the architecture that makes their project work as it changes. It maps a JavaScript or TypeScript codebase, lets the team approve project-specific boundaries, and checks future changes locally and in CI. AI agents can use the same project context and verification results as developers.

Catch project-specific regressions

A type checker can confirm that code is valid TypeScript. It cannot know that this project requires client components to stay away from persistence modules. Once the team approves that boundary, Guard can detect a violating import in changed files and show which rule was triggered.

Project boundary:  Client → Server Action → Service → Repository → Database

Possible regression: Client ─────────────────────────────────────→ Database

Guard discovers the architecture in the repository; it does not prescribe one universal structure or activate proposed rules without approval.

Get started

Requirements: Node.js >=20.19 and a JavaScript or TypeScript project.

# pnpm

pnpm add -D @codapult/guard pnpm exec codapult-guard init

npm

npm install --save-dev @codapult/guard npx codapult-guard init

Review the generated project model, proposed rules, contracts, and baseline under .codapult/guard/ before relying on the results. Then run Guard's architecture checks:

pnpm exec codapult-guard verify --no-project-checks --tools off

verify can run your configured project checks and detected adapters. The flags above limit this run to Guard's built-in checks. With npm, run npx codapult-guard verify --no-project-checks --tools off. See the complete guide for initialization and daily workflows.

Use Guard with an AI agent

Install a managed instruction block for your agent so it knows when to load Guard context and run verification:

pnpm exec codapult-guard install-agent codex

Supported hosts and MCP setup are in the AI-agent integration guide and host integration guides.

The MCP server uses host-managed local stdio, with no network listener or application-level authentication. The host and operating system control process access and workspace permissions; see the security model.

Choose a GitHub setup

Choose a preset from the existing workflow templates and follow only the hosting steps for that level of protection. Most projects can start with standard PR checks.

Preset	Use it when	Guide
PR checks	You want Guard findings and a required check on ordinary pull requests.	GitHub PR checks
Trusted PR verification	The Guard check must come from a protected workflow source, including for fork PRs.	Trusted PR setup
Merge queue	Your repository merges through a GitHub merge queue.	Merge queue setup

If you are unsure, use PR checks first. It is useful CI feedback, but its workflow lives in the project being checked and can be changed by a pull request. Choose trusted verification when the check itself must be protected from that change.

What Guard does

Learns project-specific structure, dependencies, boundaries, and existing findings.
Checks approved architecture rules and contracts without imposing a universal architecture.
Shows change impact and prepares bounded, redacted context for AI review.
Runs configured project checks and adapters when enabled; it does not replace them.
Produces deterministic CLI, JSON, and SARIF results for local use and CI.

Guard is local-first and does not call an LLM. The AI host owns model access, edits, and its repair loop. Guard complements TypeScript, ESLint or Biome, tests, SAST, and dependency scanners; it does not replace them.

Documentation

GitHub setup presets — choose and configure the CI level you need.
Complete Guard guide — commands, policy, results, security, and advanced workflows.
AI-agent integration — managed instructions and MCP workflow.
Host integrations — Codex, Cursor, Claude Code, Copilot, Gemini CLI, and generic MCP clients.
Policy mutation controls — approval and protected policy behavior.
Extensions — adapters, output formats, and integration boundaries.

For contributors

Maintainer checks and project fixture coverage are documented in the fixture guide and release guide.

More from Codapult

Starting a SaaS from scratch? Codapult is a production-ready Next.js SaaS foundation built for AI-assisted development, with modular architecture, built-in AI, MCP context, and source code under your control.

License

MIT. See LICENSE.

Guard

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Which apps can use it

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

REA

Netdata

Front-End Checklist

README from the maker

@codapult/guard

Architecture guardrails for AI-assisted development

Catch project-specific regressions

Get started

npm

Use Guard with an AI agent

Choose a GitHub setup

What Guard does

Documentation

For contributors

More from Codapult

License