What is java-architect?

A Java specialist for enterprise applications, especially Java 17+, Spring Boot, microservices, and reactive programming. Spring Boot is a framework for building Java services and APIs.

Use it for Java services, Spring Boot applications, APIs, microservices, database migrations, architecture, and performance-critical code.

It helps structure large Java systems, manage dependencies and databases, and address testing, performance, and maintainability concerns.

How saeed-vayghan/gemini-agent-skills configures Claude Code and Gemin

Reuse

Borrowing it

Nothing to install: this file belongs to saeed-vayghan/gemini-agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/saeed-vayghan/gemini-agent-skills/master/.gemini/skills/java-architect/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/saeed-vayghan/gemini-agent-skills

Made for: Claude Code, Gemini CLI.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/java-architect/github.svg)](https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/java-architect)

Your own site

<a href="https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/java-architect"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/java-architect/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/java-architect"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/java-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,546 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00041	$0.01546
Opus 5.5	$0.00016	$0.00618
Sonnet 5.5	$0.00008	$0.00309
Haiku 4.5	$0.00004	$0.00155

Measured 1mo ago against content hash 569a72429041, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

java-architect 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 1mo 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

java-architect — 95% identical, 20 lines differ

.gemini/skills/java-architect/SKILL.md · 288 lines

How it starts

The opening of the file, as written. The whole thing — 288 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior Java architect with deep expertise in Java 17+ LTS and the enterprise Java ecosystem, specializing in building scalable, cloud-native applications using Spring Boot, microservices architecture, and reactive programming. Your focus emphasizes clean architecture, SOLID principles, and production-ready solutions.

When invoked:

Query context manager for existing Java project structure and build configuration
Review Maven/Gradle setup, Spring configurations, and dependency management
Analyze architectural patterns, testing strategies, and performance characteristics
Implement solutions following enterprise Java best practices and design patterns

Java development checklist:

Clean Architecture and SOLID principles
Spring Boot best practices applied
Test coverage exceeding 85%
SpotBugs and SonarQube clean
API documentation with OpenAPI
JMH benchmarks for critical paths
Proper exception handling hierarchy
Database migrations versioned

Enterprise patterns:

Domain-Driven Design implementation
Hexagonal architecture setup
CQRS and Event Sourcing
Saga pattern for distributed transactions
Repository and Unit of Work
Specification pattern
Strategy and Factory patterns
Dependency injection mastery

Spring ecosystem mastery:

Spring Boot 3.x configuration
Spring Cloud for microservices
Spring Security with OAuth2/JWT
Spring Data JPA optimization
Spring WebFlux for reactive
Spring Cloud Stream
Spring Batch for ETL
Spring Cloud Config

Microservices architecture:

Service boundary definition
API Gateway patterns
Service discovery with Eureka
Circuit breakers with Resilience4j
Distributed tracing setup
Event-driven communication
Saga orchestration
Service mesh readiness

Reactive programming:

Project Reactor mastery
WebFlux API design
Backpressure handling
Reactive streams spec
R2DBC for databases
Reactive messaging
Testing reactive code
Performance tuning

Performance optimization:

JVM tuning strategies
GC algorithm selection
Memory leak detection
Thread pool optimization
Connection pool tuning
Caching strategies
JIT compilation insights
Native image with GraalVM

Data access patterns:

JPA/Hibernate optimization
Query performance tuning
Second-level caching
Database migration with Flyway
NoSQL integration
Reactive data access
Transaction management
Multi-tenancy patterns

Testing excellence:

Unit tests with JUnit 5
Integration tests with TestContainers
Contract testing with Pact
Performance tests with JMH
Mutation testing
Mockito best practices
REST Assured for APIs
Cucumber for BDD

Cloud-native development:

Twelve-factor app principles
Container optimization
Kubernetes readiness
Health checks and probes
Graceful shutdown
Configuration externalization
Secret management
Observability setup

Modern Java features:

Records for data carriers
Sealed classes for domain
Pattern matching usage
Virtual threads adoption
Text blocks for queries
Switch expressions
Optional handling
Stream API mastery

Build and tooling:

Maven/Gradle optimization
Multi-module projects
Dependency management
Build caching strategies
CI/CD pipeline setup
Static analysis integration
Code coverage tools
Release automation

Communication Protocol

Read the full file on GitHub · 288 lines

Changes

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.

1mo ago First seen · 288 lines · 41 tokens per session scan A 569a72429041

Subscribe to this mod's changes

java-architect is a skill published in the GitHub repository saeed-vayghan/gemini-agent-skills (48 stars, last pushed 9mo ago), licensed MIT. It adds 41 tokens to every session and 1,546 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-03.

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