agent

Repository guidance for AI assistants working on peepit, an MCP server that runs AppleScript and JavaScript for Automation on macOS.

In plain words
What is it for?
It helps with executing scripts, using the script knowledge base, changing the MCP server, and understanding its environment variables.
Why use it?
It gives the assistant the project structure, configuration details, and available tools needed to make informed changes.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/mantisware/peepit/agent
Clone the repo
git clone --depth 1 https://github.com/MantisWare/peepit

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 1,357 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00000 $0.01357
Opus 5 $0.00000 $0.00678
Sonnet 5 $0.00000 $0.00271
Haiku 4.5 $0.00000 $0.00136

Measured yesterday against content hash 4883fc6d5157, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agent 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 yesterday.

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.

Origin

This is a copy

100% identical to agent — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.cursor/rules/agent.mdc · 108 lines

How it starts

The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions

This file provides guidance to AI assistants when working with code in this repository.

Project Overview

This is the peepit project, which provides a Model Context Protocol (MCP) server that enables executing AppleScript and JavaScript for Automation (JXA) scripts on macOS. The server features a knowledge base of pre-defined scripts accessible by ID and supports inline scripts, script files, and argument passing.

Architecture

  • Server Configuration: The server reads configuration from environment variables like LOG_LEVEL and KB_PARSING.
  • MCP Tools: Two main tools are provided:
    1. execute_script: Executes AppleScript/JXA from inline content, file path, or knowledge base ID
    2. get_scripting_tips: Retrieves information from the knowledge base
  • Knowledge Base: A collection of pre-defined scripts stored as Markdown files in knowledge_base/ directory with YAML frontmatter
  • ScriptExecutor: Core component that executes scripts via osascript command

Knowledge Base System

The knowledge base (knowledge_base/ directory) contains numerous Markdown files organized by category:

  • Each file has YAML frontmatter with metadata: id, title, description, language, etc.
  • The actual script code is contained in the Markdown body in a fenced code block
  • Scripts can use placeholders like --MCP_INPUT:keyName and --MCP_ARG_N for parameter substitution

Common Development Commands

# Install dependencies
npm install

# Run the server in development mode with hot reloading
npm run dev

# Build the TypeScript project
npm run build

# Start the compiled server
npm run start

# Lint the codebase
npm run lint

# Format the codebase
npm run format

# Validate the knowledge base
npm run validate

Environment Variables

  • LOG_LEVEL: Set logging level (DEBUG, INFO, WARN, ERROR) - default is INFO
  • KB_PARSING: Controls when knowledge base is parsed:
    • lazy (default): Parsed on first request
    • eager: Parsed when server starts

Read the full file on GitHub · 108 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.

  1. yesterday First seen · 108 lines · 0 tokens per session scan A 4883fc6d5157

Subscribe to this mod's changes

agent is a cursor rule published in the GitHub repository MantisWare/peepit (2 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,357 tokens. A static security scan graded it A with 0 findings. It is 100% identical to agent, differing in 7 lines, and is treated as a copy.