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mcp-client-app: Instructions file for Claude Code

CLAUDE.md

mcp-client-app CLAUDE.md is an instructions file for Claude Code from RegiByte/mcp-client-app. It costs 250 tokens per session, scanned A, original, MIT.

A set of project instructions for developing an MCP client app, an application that connects to tools through the Model Context Protocol. It documents commands, code style, project structure, and TypeScript and React practices.

In plain words
What is it for?
Use it when developing this app, running its development or build commands, checking types and lint rules, or deciding where Electron and React code belongs.
Why use it?
It gives contributors a shared reference for building, checking, formatting, and organizing the application consistently.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is RegiByte/mcp-client-app's own configuration. It tells Claude Code how to work on mcp-client-app itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-client-app configures →

not rated 11repo 1y ago A scan 250 tokens original MIT
View source ↗ RegiByte/mcp-client-app
Reuse

Borrowing it

Nothing to install: this file belongs to RegiByte/mcp-client-app. 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/RegiByte/mcp-client-app/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/RegiByte/mcp-client-app

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.

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README.md
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/regibyte/mcp-client-app/claude-md"><img src="https://agentmods.dev/badge/instructions/regibyte/mcp-client-app/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 250 This file is loaded in full into every session.
When invoked 250 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00250 $0.00250
Opus 5.5 $0.00100 $0.00100
Sonnet 5.5 $0.00050 $0.00050
Haiku 4.5 $0.00025 $0.00025

Measured 2mo ago against content hash c6416bfbc757, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-client-app 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 2mo 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 · 25 lines

What it actually says

MCP Client App Development Guidelines

Build & Development Commands

  • pnpm dev: Start the development server
  • pnpm build: Run typecheck and build the app
  • pnpm build:mac: Build for macOS
  • pnpm build:win: Build for Windows
  • pnpm build:linux: Build for Linux

Lint & Format Commands

  • pnpm lint: Run ESLint
  • pnpm format: Format code with Prettier
  • pnpm typecheck: Run TypeScript type checking

Code Style Guidelines

  • TypeScript: Use strict typing with proper interfaces/types
  • React: Use functional components with hooks
  • Imports: Group imports (React, libraries, local) with blank line between groups
  • Naming: PascalCase for components, camelCase for variables/functions
  • Error Handling: Use try/catch for async operations
  • Project Structure:
    • main: Electron main process (IPC handlers, services)
    • preload: Electron preload scripts
    • renderer: React UI components
  • State Management: Use React Context API for shared state
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.

  1. 2mo ago First seen · 25 lines · 250 tokens per session scan A c6416bfbc757

Subscribe to this mod's changes

mcp-client-app CLAUDE.md is an instructions file published in the GitHub repository RegiByte/mcp-client-app (11 stars, last pushed 1y ago), licensed MIT. It adds 250 tokens to every session, about $0.0010 per session on Opus 5.5. 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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