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java-coding-guide-pro SKILL.md skillA

This file is byte-identical to the first copy the registry indexed, one of 3 indexed copies. Same content hash, so the same checks give both the same grade.

java-coding-guide-pro from baixuanzhu/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add baixuanzhu/skills/java-coding-guide-pro@v3.4.1

Pins v3.4.1 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: baixuanzhu/skills
Path: eval/java-coding-guide-pro/darwin-validation-v3.5.0/snapshots/v3.4.1/SKILL.md
Versions recorded: 1
Latest version: v3.4.1, committed Aug 23, 2026
Size: 14,641 bytes
Repository stars: 3
License: MIT

Java 编码规范与避坑助手。在编写、修改、重构或审查任何 Java / Spring Boot 代码时使用本技能—— 无论用户是否提到编码规范或具体工具库（Java coding / code review / refactoring / best practices / code quality）。覆盖：判空与字符串、集合与 Stream、日期时间、文件 IO / HTTP 调用 / JSON 序列化、线程池与并发、Bean 拷贝、加密哈希、异常处理与日志、金额与浮点精确运算、现代 Java 语法（JDK 8~25，按 LTS 版本门控）。次级触发信号：new SimpleDateFormat、Executors.newXxx、new Thread()、double/float 算钱、 new BigDecimal(double)、BeanUtils.copyProperties、catch(Throwable)、手搓 MessageDigest、 log.error("x"+e) 拼接、Optional.get() 不判空、subList 分页、finally 中…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Java 编码指南

面向日常 Java 开发的**编码约定助手**。每条规则含「✗ 禁止 → ✓ 推荐 → 为什么」，覆盖 JDK 8~25+（LTS 锚定：8/11/17/21/25）。

## 三条铁律

1. **栈中立**：库的选择**跟随项目既有依赖**，本指南不强加任何库；Spring 项目优先 Spring 生态自带能力（Jackson / RestTemplate / WebClient / SLF4J）。
2. **一域一默认**：每个场景只给唯一推荐（以项目既有栈为准），不列举「或 A 或 B」制造决策疲劳。
3. **版本门控**：先确认目标 JDK，高版本特性按门控使用——JDK 8 项目严禁 `var`/`record`/`switch 表达式`/文本块/`sealed`/`虚拟线程`。

## 第 0 步：栈探测与适配（激活时先执行）

读 `pom.xml` / `build.gradle` 一次性探测（读不到则一次问全，勿分多轮）：

1. **目标 JDK**：`maven.compiler.release` / `<source>` / `sourceCompatibility`；读不到问用户「目标 JDK 版本是（8 / 11 / 17 / 21 / 25）？」。
2. **已有栈**：Spring 系（自带 Jackson/RestTemplate/WebClient/SLF4J）、Hutool、commons-lang3、Guava、Gson/Fastjson、OkHttp、Lombok、MapStruct。
3. **三条适配规则**：
   - 项目**已有**对应能力的库 → **跟随既有库**，不另引、不混用（一个项目一套字符串/集合工具）；仅当既有库缺该能力时补引，并在代码注释标注混用原因。
   - **高风险能力缺失**且任务确实需要（见「高风险场景」表）→ 触发 C-CHECK 询问是否引入。
   - **低风险能力缺失**（判空/集合/随机数/日期等）→ 直接用 JDK 原生，**零打断、不询问**。

## JDK 版本策略（五档 LTS 语义）

- **JDK 8（下限）**：可用 `Optional`/`Stream`/`java.time`/`CompletableFuture`/Lambda。**禁** `var`/`record`/`switch 表达式`/文本块/`sealed`/`虚拟线程`/`Stream.toList()`。
- **JDK 11**：+ `var`(10)、JDK `HttpClient`(11)。
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add baixuanzhu/skills/java-coding-guide-pro@sha256:51d2ce1be80564e9

The line at the top of this page pins the label v3.4.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_xwwlyzp3v64mmfzz.svg)](https://markdownregistry.com/a/art_xwwlyzp3v64mmfzz)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Aug 23, 2026.

version	committed	commit	size	audit
v3.4.1 latest	2026-08-23	fae36a2	14,641 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (14641 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

baixuanzhu/skills · 3 stars · license MIT · pushed 2026-11-03 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_xwwlyzp3v64mmfzz
GET https://markdownregistry.com/api/v1/resolve?ref=baixuanzhu/skills/java-coding-guide-pro
GET https://markdownregistry.com/api/v1/blob/51d2ce1be80564e951e9eca3927be4f09edafa3c57406e29a3ce0e4940266176

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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