A general development assistant that examines a project’s technology choices and sends work to specialist helpers for tasks such as design, coding, debugging, review, and research.

It helps clarify requirements, plan and implement changes, investigate problems, review code, and handle interface work while following the project’s design rules.

It gives developers one starting point for projects built with different programming languages and frameworks.

dev — Plugin for Claude Code by MadAppGang/magus

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/MadAppGang/magus

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/madappgang/magus/dev/github.svg)](https://agentmods.dev/plugins/madappgang/magus/dev)

Your own site

<a href="https://agentmods.dev/plugins/madappgang/magus/dev"><img src="https://agentmods.dev/badge/plugins/madappgang/magus/dev/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/madappgang/magus/dev"><img src="https://agentmods.dev/badge/plugins/madappgang/magus/dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 19 skills, 15 commands, 12 agents cost 2,416 tokens a session between them.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

dev scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/dev/.claude-plugin/plugin.json · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "dev",
  "version": "9.2.1",
  "description": "Universal development assistant. Detects the project stack and routes work to specialist agents for architecture, implementation, debugging, review and research, enforcing design-system guardrails on every UI change.",
  "author": {
    "name": "Jack Rudenko",
    "email": "[email protected]",
    "company": "MadAppGang"
  },
  "license": "MIT",
  "keywords": [
    "development",
    "universal",
    "language-agnostic",
    "auto-detection",
    "multi-stack",
    "learning",
    "preferences",
    "interview",
    "specification",
    "requirements",
    "5-whys",
    "LLMREI",
    "elicitation",
    "react",
    "typescript",
    "tailwindcss",
    "css-modules",
    "lightning-css",
    "postcss",
    "golang",
    "bun",
    "python",
    "rust",
    "orchestration",
    "optional-designer",
    "gemini",
    "multimodal",
    "vision"
  ],
  "category": "development",
  "dependencies": [
    {
      "name": "claudish",
      "version": "^2.0"
    },
    {
      "name": "mnemex",
      "version": "^1.0"
    }
  ],
  "skills": [
    "./skills/context-detection",
    "./skills/core/universal-patterns",
    "./skills/architecture",
    "./skills/core/testing-strategies",
    "./skills/core/aggregate-reviews",
    "./skills/testing/ui-playwright",
    "./skills/core/team-gate",
    "./skills/frontend/design-system-guardrails",
    "./skills/frontend/browser-debugging",
    "./skills/frontend/frontend-implement",
    "./skills/backend/db-branching",
    "./skills/documentation-standards",
    "./skills/discipline/verification-before-completion",
    "./skills/discipline/test-driven-development",
    "./skills/discipline/systematic-debugging",
    "./skills/discipline/worktree-lifecycle",
    "./skills/plugin-sdk-patterns",
    "./skills/code-roast",
    "./skills/planning/brainstorming"
  ],
  "compatibility": {
    "claudeCode": ">=0.1.0"
  },
  "requires": {
    "schema": 1,
    "bin": [
      {
        "na

Read the full file on GitHub · 120 lines

Contents

What it installs

The manifest is a name and a version. 19 skills, 15 commands, 12 agents travel with it, and installing the plugin installs all of them — 2,416 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

today Changed 85cacd0f78e7
3d ago Changed 508641f9fbad
10d ago Changed · +43 lines 35b9eba8a5f1
16d ago Changed 8db9cbc0867f
20d ago Changed · -2 lines 57afb157c3c4
22d ago Changed · -4 lines 5e197549098f
23d ago Changed 0909c8365651
25d ago Changed 1e5ffc910c1d
28d ago Changed 78080f393264
1mo ago First seen · 83 lines scan A 23182611a558

Subscribe to this mod's changes

dev is a plugin published in the GitHub repository MadAppGang/magus (13 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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