What is claude-code-marketplace CLAUDE.md?

A project instruction file for a web dashboard that browses, installs, and manages Claude Code plugins. It documents the project commands, architecture, main files, and code-quality checks.

It helps develop the Express.js backend and vanilla JavaScript frontend, including plugin browsing, filesystem scanning, search and filters, file views, and plugin management.

It gives an AI coding assistant the project context needed to change the dashboard safely and consistently. It also records how to run and lint the application.

How NikiforovAll/claude-code-marketplace configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to NikiforovAll/claude-code-marketplace. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/NikiforovAll/claude-code-marketplace/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/NikiforovAll/claude-code-marketplace

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/instructions/nikiforovall/claude-code-marketplace/claude-md/github.svg)](https://agentmods.dev/instructions/nikiforovall/claude-code-marketplace/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/nikiforovall/claude-code-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/nikiforovall/claude-code-marketplace/claude-md/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/instructions/nikiforovall/claude-code-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/nikiforovall/claude-code-marketplace/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 511 This file is loaded in full into every session.

When invoked 511 The same file — it is already loaded in full.

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.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00511	$0.00511
Opus 5	$0.00255	$0.00255
Sonnet 5	$0.00102	$0.00102
Haiku 4.5	$0.00051	$0.00051

Measured 9d ago against content hash 35f2bd89cf74, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

claude-code-marketplace CLAUDE.md 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 9d ago.

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.

CLAUDE.md · 40 lines

How it starts

The opening of the file, as written. The whole thing — 40 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Project

Claude Code Marketplace — a web dashboard for browsing, installing, and managing Claude Code plugins across multiple marketplaces. Vanilla JS SPA frontend + Express.js backend.

Commands

npm start                # Start server at http://localhost:3542
npm run dev              # Start with auto-open browser
npm run lint             # Check with Biome
npm run lint:fix         # Auto-fix linting issues

CLI flags: --port <number>, --project <path>, --open

Architecture

Two main files compose the entire app:

server.js — Express backend. Reads plugin registry from ~/.claude/plugins/, scans filesystem for components, delegates install/uninstall/enable/disable to claude plugin CLI commands. All API routes under /api/.
public/app.js — SPA client. Tree view (left panel) shows marketplaces→plugins hierarchy. Detail panel (right) shows plugin info, components, file browser. State managed via globals (marketplaces, selectedPluginId, searchFilter, scopeFilter).
public/style.css — Dark/light theme via CSS custom properties.
public/index.html — HTML shell with modals.

No build step. No framework. Static files served directly by Express.

Key Concepts

Plugin Scopes: user (~/.claude/plugins/), project (./<project>/.claude/), local (.claude/settings.local.json). Each scope has independent install/enable state.

Components: Skills (skills/), commands (commands/), agents (agents/), then the JSON-file types driven by the JSON_COMPONENTS table in server.js — MCP servers (.mcp.json), hooks (hooks.json), LSP servers (.lsp.json), monitors (monitors.json). Each resolves its path as marketplace entry → .claude-plugin/plugin.json experimental.<key> → default.

Virtual Marketplaces: User and project customizations shown as synthetic marketplace entries from local filesystem.

Caching: In-memory marketplace cache invalidated on plugin operations.

Linting

Biome 2.4.7 — enforced via Husky pre-commit hook on public/app.js and public/style.css. Config: 2-space indent, 120 char width, single quotes.

Read the full file on GitHub · 40 lines

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.

9d ago First seen · 40 lines · 511 tokens per session scan A 35f2bd89cf74

Subscribe to this mod's changes

claude-code-marketplace CLAUDE.md is an instructions file published in the GitHub repository NikiforovAll/claude-code-marketplace (2 stars, last pushed 2d ago), licensed MIT. It adds 511 tokens to every session, about $0.0026 per session on Opus 5. 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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