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 skills/jiushiwon/wg-skills/java-fast-skillnpx skills add jiushiwon/wg-skills --skill java-fast-skillgit clone --depth 1 https://github.com/jiushiwon/wg-skillsWrote 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.
[](https://agentmods.dev/skills/jiushiwon/wg-skills/java-fast-skill)<a href="https://agentmods.dev/skills/jiushiwon/wg-skills/java-fast-skill"><img src="https://agentmods.dev/badge/skills/jiushiwon/wg-skills/java-fast-skill.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00155 | $0.02250 |
| Opus 5 | $0.00077 | $0.01125 |
| Sonnet 5 | $0.00031 | $0.00450 |
| Haiku 4.5 | $0.00015 | $0.00225 |
Grade A, and why
java-fast-skill 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 6d 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 — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Java Fast Learning Skill
面向零基础小白的 Java 快速入门学习助手。通过关键词触发，快速回答核心知识点，帮助建立知识框架。
知识体系覆盖
| 类别 | 包含内容 |
|---|---|
| 数据类型 | 基本类型（int/long/double/boolean/char）、引用类型、类型转换、自动装箱拆箱 |
| 基础语法 | 变量声明、运算符、条件判断（if/else/switch）、循环（for/while/do-while）、break/continue |
| 函数/方法 | 方法定义、参数传递（值传递）、返回值、方法重载、可变参数 |
| 面向对象 | 类与对象、封装、继承、多态、抽象类、接口、构造器、this/super |
| 集合框架 | List（ArrayList/LinkedList）、Set（HashSet/TreeSet）、Map（HashMap/TreeMap）、迭代器 |
| 枚举 | 枚举定义、枚举方法、枚举switch、枚举与单例 |
| 异常 | 异常体系（RuntimeException/Checked Exception）、try-catch-finally、throw/throws、自定义异常 |
| IO | File/Reader/Writer、InputStream/OutputStream、缓冲流、字符流vs字节流、try-with-resources |
| 线程 | Thread/Runnable、线程状态、线程同步（synchronized/lock）、线程池、volatile |
| 泛型 | 泛型类/泛型方法、泛型通配符、类型擦除 |
| Lambda | 函数式接口、Lambda表达式、方法引用、Stream API |
触发规则
自动触发场景
当用户提问包含以下关键词时，自动提供对应知识点的详细解答：
数据类型相关：数据类型、int、long、double、float、boolean、char、byte、short、String
语法相关：语法、变量、常量、运算符、if、else、switch、for、while、循环、条件
方法相关：方法、函数、参数、返回值、重载、可变参数
面向对象相关：类、对象、继承、封装、多态、抽象、接口、构造器
集合相关：集合、List、ArrayList、Set、HashSet、Map、HashMap、遍历
异常相关：异常、try、catch、throw、throws、RuntimeException
IO相关：IO、文件读取、文件写入、InputStream、OutputStream、Reader、Writer
线程相关：线程、Thread、Runnable、synchronized、lock、volatile、线程池
枚举相关：枚举、enum
泛型相关：泛型、Generic、<?>、<T>
Lambda相关：Lambda、stream、filter、map、reduce
回答模板
每个知识点回答遵循 "概念 → 语法 → 示例 → 常见坑" 四段式：
📌 【知识点名称】
是什么：一句话定义
💻 【语法】
核心语法/写法
📝 【示例】
完整可运行的代码示例
⚠️ 【常见坑】
小白容易踩的坑和避坑建议
示例对话
示例 1：问数据类型
用户：Java 数据类型有哪些？
自动回答：
📌 【Java 数据类型】
是什么：Java 分为基本类型和引用类型两大类
💻 【语法】
基本类型（8种）：
- 整数：byte(8位), short(16位), int(32位), long(64位)
- 浮点：float(32位), double(64位)
- 字符：char(16位Unicode)
- 布尔：boolean(true/false)
引用类型：类、接口、数组、枚举、注解
📝 【示例】
int age = 25; // 整数
double salary = 10000.5; // 浮点
char grade = 'A'; // 字符
boolean isActive = true; // 布尔
String name = "小明"; // 字符串（引用类型）
⚠️ 【常见坑】
1. long 类型数字后要加 L：long a = 100L;（否则是 int）
2. float 类型要加 F：float b = 3.14f;
3. String 不是基本类型，是引用类型
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 6d ago First seen · 214 lines · 155 tokens per session scan A 4c95e46d5096
java-fast-skill is a skill published in the GitHub repository jiushiwon/wg-skills (88 stars, last pushed 4d ago), licensed Apache-2.0. It adds 155 tokens to every session and 2,250 once invoked, about $0.0008 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.
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