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MCPLuceneServer: Instructions file for Claude Code

CLAUDE.md

MCPLuceneServer CLAUDE.md is an instructions file for Claude Code from mirkosertic/MCPLuceneServer. It costs 876 tokens per session, scanned A, original, Apache-2.0.

A project-specific guide for an MCP Lucene Server, a service that lets AI assistants search and index documents using Apache Lucene. It records development rules, important components, and coding conventions.

In plain words
What is it for?
It helps maintain search, crawling, indexing, configuration, and documentation work in this Java project.
Why use it?
It gives the coding assistant the project's constraints, such as updating documentation, testing with real documents, and changing the schema version when the index structure changes.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths.

This is mirkosertic/MCPLuceneServer's own configuration. It tells Claude Code how to work on MCPLuceneServer 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 MCPLuceneServer configures →

not rated 6repo 3d ago A scan 876 tokens original Apache-2.0
View source ↗ mirkosertic/MCPLuceneServer
Reuse

Borrowing it

Nothing to install: this file belongs to mirkosertic/MCPLuceneServer. 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/mirkosertic/MCPLuceneServer/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/mirkosertic/MCPLuceneServer

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.

agentmods badge for MCPLuceneServer CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/mirkosertic/mcpluceneserver/claude-md/github.svg)](https://agentmods.dev/instructions/mirkosertic/mcpluceneserver/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/mirkosertic/mcpluceneserver/claude-md"><img src="https://agentmods.dev/badge/instructions/mirkosertic/mcpluceneserver/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.

agentmods 80×15 button for MCPLuceneServer CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/mirkosertic/mcpluceneserver/claude-md"><img src="https://agentmods.dev/badge/instructions/mirkosertic/mcpluceneserver/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 876 This file is loaded in full into every session.
When invoked 876 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 $0.00876 $0.00876
Opus 5.5 $0.00350 $0.00350
Sonnet 5.5 $0.00175 $0.00175
Haiku 4.5 $0.00088 $0.00088

Measured 2mo ago against content hash 09e2207f1e47, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

MCPLuceneServer 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 · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCP Lucene Server - AI Assistant Guide

For user-facing documentation, see README.md.

Critical Rules

  1. ALWAYS use the implement-review-loop agent for code changes
  2. ALWAYS update README.md when adding, removing, or changing:
    • MCP tools (add tool documentation)
    • Configuration options
    • User-facing behavior
    • Troubleshooting information
  3. NEVER duplicate README content here - this file is for development context only
  4. Test with real documents before considering a feature complete
  5. Always use Context7 MCP when I need library/API documentation, code generation, setup or configuration steps without me having to explicitly ask.
  6. ALWAYS bump SCHEMA_VERSION in DocumentIndexer.java when changing the index schema (adding/removing/renaming fields, changing analyzers, or modifying field indexing options)

Key Components

Component File Responsibility
SearchTools tools/SearchTools.java simpleSearch, extendedSearch, semanticSearch, profileQuery, profileSemanticSearch, suggestTerms, getTopTerms
CrawlerTools tools/CrawlerTools.java startCrawl, getCrawlerStats/Status, pause/resume, directory management
IndexInfoTools tools/IndexInfoTools.java getIndexStats, listIndexedFields, getDocumentDetails
IndexAdminTools tools/IndexAdminTools.java indexAdmin, optimizeIndex, purgeIndex, unlockIndex, getIndexAdminStatus, UiResource
LuceneIndexService index/LuceneIndexService.java Lucene IndexWriter/Searcher, NRT, admin ops, semantic search
DocumentCrawlerService crawler/DocumentCrawlerService.java Directory walking, batch processing, state management
FileContentExtractor crawler/FileContentExtractor.java Apache Tika integration, metadata extraction
DocumentIndexer crawler/DocumentIndexer.java Lucene document creation, field schema
CrawlerConfigurationManager crawler/CrawlerConfigurationManager.java Config file persistence (~/.mcplucene/config.yaml)
DirectoryWatcherService crawler/DirectoryWatcherService.java File system monitoring for real-time updates

Read the full file on GitHub · 77 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. 2mo ago First seen · 77 lines · 876 tokens per session scan A 09e2207f1e47

Subscribe to this mod's changes

MCPLuceneServer CLAUDE.md is an instructions file published in the GitHub repository mirkosertic/MCPLuceneServer (6 stars, last pushed 3d ago), licensed Apache-2.0. It adds 876 tokens to every session, about $0.0035 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.

Backend and APIsDocumentsProductivitydesktopfulltext-searchlucenemcp-servertika
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