What is eclipse-mcp-server CLAUDE.md?

Project instructions for building and working on the eclipse-mcp-server codebase with Claude Code.

Use them when working on that repository, including its claude.md file, build process, architecture, or main abstractions.

They give contributors shared guidance about project commands, structure, and key parts of the code.

How maxmart/eclipse-mcp-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to maxmart/eclipse-mcp-server. 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/maxmart/eclipse-mcp-server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/maxmart/eclipse-mcp-server

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/maxmart/eclipse-mcp-server/claude-md/github.svg)](https://agentmods.dev/instructions/maxmart/eclipse-mcp-server/claude-md)

Your own site

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

Per session 775 This file is loaded in full into every session.

When invoked 775 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	$0.00775	$0.00775
Opus 5.5	$0.00310	$0.00310
Sonnet 5.5	$0.00155	$0.00155
Haiku 4.5	$0.00077	$0.00077

Measured 2mo ago against content hash a84e69a4a447, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

eclipse-mcp-server 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 · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Eclipse MCP Server — an Eclipse IDE plugin that exposes Eclipse workspace operations (projects, builds, launches) to Claude Code via the Model Context Protocol (MCP). Communication uses JSON-RPC 2.0 over HTTP (port 5188).

Build Commands

Plugin (Eclipse IDE plugin):

cd plugin && build-plugin.bat

Requires the plugin/bin/ directory to already exist with compiled classes (open the project in Eclipse first so it compiles via the Eclipse JDT builder). Produces eclipse.mcp.server_<version>.jar (version read from VERSION file) and copies it to the Eclipse dropins directory. Eclipse must be restarted to load changes.

There are no automated tests, linting, or formatting tools configured.

Architecture

Claude Code → HTTP POST /mcp → McpHttpServer (plugin/, port 5188)
                                       ↓
                              McpProtocolHandler (JSON-RPC dispatch)
                                       ↓
                              ToolRegistry → IMcpTool implementations
                                       ↓
                              Eclipse Platform APIs

Single component: plugin/ — Eclipse OSGi plugin (requires JavaSE-17). Auto-starts via StartupHook (registered as org.eclipse.ui.startup extension). The Activator manages the HTTP server lifecycle.

McpHttpServer uses com.sun.net.httpserver.HttpServer (built into JDK 17+) with a daemon thread pool. A single shared McpProtocolHandler instance handles all requests (it's thread-safe).

Key Abstractions

IMcpTool (plugin/src/eclipse/mcp/tools/IMcpTool.java) — Interface all tools implement: getName(), getDescription(), getInputSchema(), execute(JsonObject).
ToolRegistry — Instantiates and indexes all tools by name. Called by McpProtocolHandler for tools/list and tools/call.
McpProtocolHandler — Handles JSON-RPC 2.0 methods: initialize, tools/list, tools/call, ping. Notifications (no id) are silently ignored.

Read the full file on GitHub · 61 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.

2mo ago First seen · 61 lines · 775 tokens per session scan A a84e69a4a447

Subscribe to this mod's changes

eclipse-mcp-server CLAUDE.md is an instructions file published in the GitHub repository maxmart/eclipse-mcp-server (9 stars, last pushed 1mo ago), licensed MIT. It adds 775 tokens to every session, about $0.0031 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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eclipse-mcp-server: Instructions file for Claude Code