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.
npx agentmods add instructions/kousen/java_upgrade/claude-mdgit clone --depth 1 https://github.com/kousen/java_upgradeWhat 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 | $0.01000 | $0.01000 |
| Opus 5 | $0.00500 | $0.00500 |
| Sonnet 5 | $0.00200 | $0.00200 |
| Haiku 4.5 | $0.00100 | $0.00100 |
Grade A, and why
java_upgrade 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Project Context for Claude Code
Overview
This is a comprehensive Java training project focused on functional programming features in modern Java (Java 8+). The project provides hands-on exercises for students to learn functional programming concepts through practical examples.
Project Structure
java_upgrade/
├── src/main/java/ # Demo code and working examples
├── src/test/java/ # Exercise files with TODOs for students
├── labs.md # Comprehensive lab instructions
├── README.md # Course overview and documentation
├── CLAUDE.md # This file - project context for Claude Code
└── Java_Upgrade_Slides.pdf # Course presentation slides
Key Features
- 20 comprehensive exercises covering functional Java concepts
- Main branch contains exercises with TODO comments
- Solutions branch contains complete implementations
- Each exercise builds on previous concepts
- Modern Java idioms throughout (records, var, Stream.toList(), etc.)
Recently Added Exercises
- FileFilter Lambda Evolution (Exercise 7)
- Lazy Evaluation with Suppliers (Exercise 8)
- Book Sorting with Comparators (Exercise 12)
- BigDecimal Reduce Operations (Exercise 14)
- Parallel Streams (Exercise 14)
Java Features Covered
-
Lambda Expressions & Functional Interfaces
- Consumer, Supplier, Function, Predicate
- Method references and constructor references
- Functional interface composition
- Lazy evaluation patterns
-
Stream API
- Basic operations (map, filter, reduce)
- FlatMap for nested structures
- Collectors and advanced aggregations
- Parallel stream processing
- Performance considerations
-
Modern Java Features
- Optional patterns and chaining
- CompletableFuture async programming
- Records as data carriers
- Interface default/static methods
- Virtual threads (Java 21+)
Important Files and Patterns
Exercise Files to Remember
src/test/java/lambdas/FileFilterExercises.java- Lambda evolution patternssrc/test/java/lambdas/LazyEvaluationExercises.java- Supplier and lazy evaluationsrc/test/java/sorting/BookSortingExercises.java- Modern Comparator usagesrc/test/java/streams/BigDecimalReduceExercises.java- Reduce operationssrc/test/java/streams/ParallelStreamExercises.java- Parallel processing
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.
- 2d ago First seen · 128 lines · 1,000 tokens per session scan A db4717f4bfa1
java_upgrade CLAUDE.md is an instructions file published in the GitHub repository kousen/java_upgrade (164 stars, last pushed 8d ago), licensed MIT. It adds 1,000 tokens to every session, about $0.0050 per session on Opus 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 2026-08-30.
Other instructions, from other repositories
WxJava AGENTS.md
AGENTS.md instructions for binarywang/WxJava, covering wxjava agent 指南, 适用范围与指令优先级, 项目概览, 开发流程 and 代码风格与兼容性.
WxJava copilot-instructions.md
Copilot instructions for binarywang/WxJava, covering copilot instruction, wxjava - 微信 java sdk 开发说明, 高效开发指南, 前置条件与环境准备 and 引导、构建与校验.
pulsar java-coding.instructions.md
Coding conventions for Apache Pulsar Java source and test code.
liteflow CLAUDE.md
Instructions for dromara/liteflow, covering claude.md, 概述, 命令, 构建 and 构建整个项目（模块集由 jdk 版本自动选择 —— 见下方说明）.
imgui-java AGENTS.md
Instructions for SpaiR/imgui-java, covering agents.md, what this repo is, project layout, build & test and upgrading dear imgui or an extension.
sky CLAUDE.md
Instructions for anzellai/sky, covering claude.md, claude code — operational rules, 0. goal fidelity in autonomous loops — inviolable, 0.1 remote-push discipline — minimize ci noise and 1. memory safety — scripts/mem-guard.sh must run during dev.