Standard Beagle Tools

AI coding agent toolkit and UX MCP package monorepo — Claude Code plugins, MCP servers, and reusable npm packages for design, accessibility, and frontend tooling.

Plugins (Claude Code marketplace)

This marketplace ships a growing collection of plugins for Claude Code. The core development trio:

Plugin	Description	Version	Category
agnt	Browser superpowers for AI coding agents: dev-server + reverse proxy, live error/incident inbox, quality audits, visual regression, and sketch/design modes	0.10.1	development
lci	Lightning Code Index: sub-millisecond semantic code search and call-hierarchy intelligence	0.6.1	development
tools	Complete toolkit combining agnt and lci	1.0.0	development
mcp-architect	Design high-quality MCP servers with progressive discovery and token efficiency	0.1.0	development
mcp-tester	MCP server testing and debugging with mcp-debug	0.2.0	development
slop-mcp	SLOP integration for MCP management and orchestration	0.2.0	development
slop-coder	SLOP language coding assistant and reference	0.1.0	development
dartai	Dart task management with adversarial cooperation loops	0.3.0	development
workflow	General-purpose adversarial workflow automation	0.1.0	development
figma-query	Token-efficient Figma integration with design library extraction	0.1.0	design
ux-design	UX design principles, color theory, typography, and accessibility	0.1.0	design
ux-developer	UX-driven development with WCAG 2.2 and usability best practices	0.1.0	development
prompt-engineer	State-of-the-art prompt and context engineering for 2026	0.1.0	ai

Packages (npm @standardbeagle/*)

This monorepo also publishes six npm packages under packages/ — UX-focused MCP servers and shared libraries:

Package	Version	Description
@standardbeagle/ux-core		Shared types, validators, k-means clustering
@standardbeagle/color		Color tools — contrast, palette generation, accessibility
@standardbeagle/a11y-audit		Accessibility audit MCP server (axe-core, WCAG 2.2)
@standardbeagle/design-token		DTCG design tokens — validate, transform, generate
@standardbeagle/typography		Typography tools — modular scale, font pairing
@standardbeagle/image-processing		Image tools — sharp, blurhash, svgo

Architecture

flowchart LR
  Client[MCP Client] --> Color[packages/color]
  Client --> A11y[packages/a11y-audit]
  Client --> DT[packages/design-token]
  Client --> Typo[packages/typography]
  Client --> Img[packages/image-processing]
  Color --> Core[packages/ux-core]
  A11y --> Core
  DT --> Core
  Typo --> Core
  Img --> Core
  Img -.palette.-> Color

Each MCP server package exposes tools to MCP clients (Claude Code, Cursor, etc.) and depends on ux-core for shared utilities. The image-processing package optionally calls into color for palette extraction.

Installation

Step 1: Install the binaries

# Via npm (recommended)
npm install -g @standardbeagle/agnt @standardbeagle/lci

# Via pip
pip install agnt lightning-code-index

# Via Go (lci only)
go install github.com/standardbeagle/lci/cmd/lci@latest