797 mods tagged Java that install into Codex, measured the same four ways as everything else here: what each costs in tokens on every session, what a security scan found and why, whether it is the original, and what changed.
Ashfaqbs/software-dev-ai-claude-toolkit
Skill Claude CodeCodex
Spring Boot architecture patterns, REST API design, layered services, data access, caching, async processing, and logging. Use for Java Spring Boot backend work.
Skill Claude CodeCodex
Common design patterns with Java examples (Factory, Builder, Strategy, Observer, Decorator, etc.). Use when user asks "implement pattern", "use factory", "strategy pattern", or when designing extensible components.
Skill Claude CodeCodex
(PH) Use only for an ambiguous product request; visibly activate, ask one plain-language question at a time, and wait for explicit approval.
Skill Claude CodeCodex ✓ vendor
Use when building, modifying, or reviewing Spring Boot 4.x applications (Spring Framework 7, Spring Security 7, Hibernate 7, Jackson 3) in Java or Kotlin — REST controllers, Spring Data JPA repositories, OAuth2 / JWT, WebFlux reactive endpoints, Kafka / event-driven code, Resilience4j, Spring Cloud, or Spring Boot…
Skill Codex
Use the Maven Decoder MCP server to inspect code, APIs, methods, dependencies, versions, and usage examples from Maven artifacts installed in the user's local /.m2 repository. Use when working on Java, Maven, Gradle, Spring, Jakarta, Android, or JVM projects and the user asks about dependency internals, installed…
MCP server Claude CodeCodexCursor +2
One of 3 in .mcp.json
Model Context Protocol (MCP) server for Java decompilation. Runs locally from the @idachev/mcp-javadc npm package.
jmix-framework/jmix-agent-toolkit
Skill Claude CodeCodex
Create or change a persistent Jmix JPA entity and its required surrounding artifacts.
schemacrawler/SchemaCrawler-AI
MCP server Claude CodeCodexCursor +2
MCP server "schemacrawler-ai" as configured in schemacrawler/SchemaCrawler-AI. Runs in Docker (schemacrawler/schemacrawler-ai:17.9.0-1). Needs 11 environment variables to run.
Skill Claude CodeCodex
A Java code-generation guide for MyBatis-Plus and PageHelper, libraries used to access databases and create paginated results. It covers the usual layers of a Java web application, from database entities to REST endpoints.
AyrtonAldayr/agent-skill-java-spring-framework
Skill Claude CodeCodex
Senior Java & Spring Boot 4 / Spring Framework 7 architect skill for 2026-standard development. Use when the user asks to build, scaffold, design, review, or explain Java applications using Spring Boot 4.x, Spring Framework 7.x, Spring Modulith, or any related Spring ecosystem project. Triggers include: creating REST…
Skill Claude CodeCodex
A testing and quality-checking toolkit for running an application, finding bugs, and creating automated tests. It supports API tests and browser-based UI tests in Python or Java.
Skill Claude CodeCodex
A command-line tool for managing database migrations, which are controlled changes that update a database's structure over time.
Skill Claude CodeCodex
MUST BE USED PROACTIVELY. Universal read-only codebase exploration. Combines jrag graph navigation (call chains, routes, service boundaries, impact analysis, FQN resolution) with broad file-system search (grep, glob, file reading). Use for any exploration: locating code, tracing dependencies, finding patterns, 'where…
Skill Claude CodeCodex
A reference guide for LiteFlow, a Java framework for building business rules and process flows. It covers components, rules, data passed between steps, configuration sources, testing, monitoring, and AI-agent orchestration.
ns3154/alibaba-java-coding-guidelines-skill
Skill Claude CodeCodex
A set of rules for reviewing, generating, and refactoring Java code against Alibaba Java Coding Guidelines, a published style and quality guide. It also covers related Spring, MyBatis, Maven, SQL, database, logging, error-handling, and security code.
Skill Claude CodeCodex
Write Java microbenchmarks with JMH (Java Microbenchmark Harness) that produce trustworthy numbers — not numbers distorted by JIT dead-code elimination, constant folding, insufficient warmup, or single-fork JIT contamination. Use this skill whenever the user writes @Benchmark, mentions JMH, microbenchmark, throughput…
Skill Claude CodeCodex
General-purpose coding-agent workflow for Java enterprise backend projects. Use when implementing features, fixing bugs, refactoring, reviewing code/PRs, adding fields/APIs/database schema changes, changing REST/RPC endpoints, repository/mapper persistence, MQ/CDC consumers, transaction boundaries, JUnit/Mockito/Spock…
wzx2002/java-backend-unified-spec-skill
Skill Claude CodeCodex
Unified standard for Java backend project design, implementation, refactoring, and code review. Use whenever an AI coding agent (Claude Code, Codex, Cursor, Aider, etc.) needs to build or modify a Java backend that should follow module-first organization, preferred top-level module naming infrastructure / persistence…
ETHAN0430/java-class-analyzer-mcp
MCP server Claude CodeCodexCursor +2
MCP server "java-class-analyzer-mcp-server" as configured in ETHAN0430/java-class-analyzer-mcp. Runs locally from the @yifei/java-class-analyzer-mcp-server npm package.
Skill Claude CodeCodex
Enterprise-grade Spring Boot 3.5.x/4.x development guide. Use when building Spring Boot APIs, microservices, or enterprise Java applications. Covers Java Records as DTOs, Virtual Threads, ProblemDetail (RFC 7807), RestClient, structured logging, Testcontainers, observability, sealed exception hierarchies, and GraalVM…
zander-zyx/java-development-skill
Skill Claude CodeCodex
Use when working on any Java or JVM project: plain Java, libraries, CLI tools, Maven/Gradle builds, Spring Boot, Jakarta EE, MyBatis/MyBatis-Plus, JPA/Hibernate, Lombok, Java tests, Java code review, API design, exception handling, security review, refactoring, dependencies, Java version upgrades, javax/jakarta…
databricks-solutions/partner-ai-dev-kit
Skill Claude CodeCodex
PWAF-compliant Databricks JDBC Driver (databricks-jdbc v3+): PAT, OAuth M2M, OAuth U2M (custom OAuth app, token-env). Use when building or testing Java SQL warehouse integrations.
MCP server Claude CodeCodexCursor +2
Universal MCP server for analyzing Java classes from Maven dependencies with full JavaDoc support. Runs locally from the java-class-analyzer-mcp npm package.
MCP server Claude CodeCodexCursor +2
Gradle-accurate JVM classpath; fetch Java source, signatures, and class structure for agents. Runs locally from the jvmsrc npm package. Needs 6 environment variables to run.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: