Claude Code mod

java-rules

In Java projects, keeps Claude on constructor injection, try-with-resources, no swallowed exceptions and the declared Java version

1 starsMemory & instructions mods Plugin marketplaceValidates on Claude Code 2.1.316 Source

Install

Inside Claude Code

/plugin marketplace add MatheusChiodi/cockpit
/plugin install java-rules@cockpit

Mods install like plugins. Run /reload-plugins or start a new session to load it.

What it can access

Reach: L1Reads: reads files
Hooks: prompt.compose

From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.

How Claude Code mods work

A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.

Claude Code docs

Details

Repository: MatheusChiodi/cockpit
Folder: mods/java-rules
Marketplace: cockpit
Author: Matheus Chiodi
Type: Memory & instructions mods
License: MIT
Last updated: 18 October 2026
Listed in: awesome-claude-code-mods

FAQ

What is java-rules?

In Java projects, keeps Claude on constructor injection, try-with-resources, no swallowed exceptions and the declared Java version It is a mod for Claude Code, from MatheusChiodi/cockpit on GitHub.

What can the java-rules mod access?

Its widest reach is "reads" (reads files). Like any mod, it runs with your permissions.

How do I install java-rules?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add MatheusChiodi/cockpit and then /plugin install java-rules@cockpit.

Is java-rules popular?

MatheusChiodi/cockpit has 1 GitHub stars and 0 forks, and is included in 1 curated Claude Code list. It was last updated on 18 October 2026.

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