What is jetbrains-index-mcp-plugin CLAUDE.md?

Repository instructions for an IntelliJ plugin that provides an MCP server, allowing coding agents to use JetBrains IDE indexes and code-analysis tools. It supports many JetBrains IDEs and is built with Kotlin and Gradle.

Use them when developing the plugin, adding or changing MCP tools, working with IDE indexes, code search, definitions, usages, type or call hierarchies, refactoring, completion, or inspections.

They explain the plugin's architecture, supported IDE versions, technology choices, and intended agent capabilities. This helps contributors make compatible changes and understand how code navigation and refactoring are exposed.

How hechtcarmel/jetbrains-index-mcp-plugin configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to hechtcarmel/jetbrains-index-mcp-plugin. 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/hechtcarmel/jetbrains-index-mcp-plugin/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/hechtcarmel/jetbrains-index-mcp-plugin

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/hechtcarmel/jetbrains-index-mcp-plugin/claude-md/github.svg)](https://agentmods.dev/instructions/hechtcarmel/jetbrains-index-mcp-plugin/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/hechtcarmel/jetbrains-index-mcp-plugin/claude-md"><img src="https://agentmods.dev/badge/instructions/hechtcarmel/jetbrains-index-mcp-plugin/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/hechtcarmel/jetbrains-index-mcp-plugin/claude-md"><img src="https://agentmods.dev/badge/instructions/hechtcarmel/jetbrains-index-mcp-plugin/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 11,275 This file is loaded in full into every session.

When invoked 11,275 The same file — it is already loaded in full.

Security scan A 1 finding. 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	$0.11275	$0.11275
Opus 5	$0.05638	$0.05638
Sonnet 5	$0.02255	$0.02255
Haiku 4.5	$0.01128	$0.01128

Measured today against content hash cf1f8a9b364f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

jetbrains-index-mcp-plugin CLAUDE.md scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

requests with no `Origin` header at all, which would break curl and several clients.

CLAUDE.md · 714 lines

How it starts

The opening of the file, as written. The whole thing — 714 lines — stays where its author put it; the contents beside it link to each section on GitHub.

IDE Index MCP Server - Development Guide

An IntelliJ Platform plugin that exposes an MCP (Model Context Protocol) server, enabling coding agents to leverage the IDE's powerful indexing and refactoring capabilities.

Works with JetBrains IDEs: IntelliJ IDEA, PyCharm, WebStorm, GoLand, PhpStorm, RubyMine, CLion, RustRover, DataGrip, and Android Studio.

Project Overview

Goal

Create an MCP server within an IntelliJ plugin that allows AI coding assistants to:

Perform refactoring operations (rename, extract, move, etc.)
Query type hierarchy and call hierarchy
Access code navigation features (find usages, find definition)
Leverage IDE indexes for fast code search and analysis
Use code completion and inspection APIs

Technology Stack

Language: Kotlin (JVM 21)
Build System: Gradle 9.0 with Kotlin DSL
IDE Platform: IntelliJ Platform 2025.3+ (pluginSinceBuild = 253; builds against IntelliJ IDEA Ultimate (IU) — IC is not published for 2025.3+)
HTTP Server: Ktor CIO 3.2.3 (embedded, configurable port)
Protocol: Model Context Protocol via the official MCP Kotlin SDK (io.modelcontextprotocol:kotlin-sdk-server). Negotiates 2024-11-05 … 2025-11-25.

Key Documentation

IntelliJ Platform SDK

Main Documentation: https://plugins.jetbrains.com/docs/intellij/welcome.html
PSI (Program Structure Interface): https://plugins.jetbrains.com/docs/intellij/psi.html
Indexing and PSI Stubs: https://plugins.jetbrains.com/docs/intellij/indexing-and-psi-stubs.html
Rename Refactoring: https://plugins.jetbrains.com/docs/intellij/rename-refactoring.html
Modifying the PSI: https://plugins.jetbrains.com/docs/intellij/modifying-psi.html
Plugin Configuration: https://plugins.jetbrains.com/docs/intellij/plugin-configuration-file.html
Explore API: https://plugins.jetbrains.com/docs/intellij/explore-api.html

Model Context Protocol (MCP)

Specification: https://spec.modelcontextprotocol.io/specification/2025-03-26/
Tools API: https://modelcontextprotocol.io/specification/2025-03-26/server/tools
Resources API: https://modelcontextprotocol.io/specification/2025-03-26/server/resources
Legacy SSE Transport: https://spec.modelcontextprotocol.io/specification/2024-11-05/basic/transports/
GitHub: https://github.com/modelcontextprotocol/modelcontextprotocol

Read the full file on GitHub · 714 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.

today Changed · +88 tokens per session cf1f8a9b364f
6d ago Changed · +76 tokens per session 4e90a2664ce3
10d ago First seen · 714 lines · 11,111 tokens per session scan A 46930c2d0f77

Subscribe to this mod's changes

jetbrains-index-mcp-plugin CLAUDE.md is an instructions file published in the GitHub repository hechtcarmel/jetbrains-index-mcp-plugin (332 stars, last pushed today), licensed MIT. It adds 11,275 tokens to every session, about $0.0564 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

jetbrains-index-mcp-plugin: Instructions file for Claude Code