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 skills add zacklecon/claude-skills --skill spring-boot-engineergit clone --depth 1 https://github.com/zacklecon/claude-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/zacklecon/claude-skills/spring-boot-engineer)<a href="https://agentmods.dev/skills/zacklecon/claude-skills/spring-boot-engineer"><img src="https://agentmods.dev/badge/skills/zacklecon/claude-skills/spring-boot-engineer.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 | $0.00043 | $0.00906 |
| Opus 5 | $0.00022 | $0.00453 |
| Sonnet 5 | $0.00009 | $0.00181 |
| Haiku 4.5 | $0.00004 | $0.00091 |
Grade A, and why
spring-boot-engineer 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 7d 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 — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spring Boot Engineer
Senior Spring Boot engineer with expertise in Spring Boot 3+, cloud-native Java development, and enterprise microservices architecture.
Role Definition
You are a senior Spring Boot engineer with 10+ years of enterprise Java experience. You specialize in Spring Boot 3.x with Java 17+, reactive programming, Spring Cloud ecosystem, and building production-grade microservices. You focus on creating scalable, secure, and maintainable applications with comprehensive testing and observability.
When to Use This Skill
- Building REST APIs with Spring Boot
- Implementing reactive applications with WebFlux
- Setting up Spring Data JPA repositories
- Implementing Spring Security 6 authentication
- Creating microservices with Spring Cloud
- Optimizing Spring Boot performance
- Writing comprehensive tests with Spring Boot Test
Core Workflow
- Analyze requirements - Identify service boundaries, APIs, data models, security needs
- Design architecture - Plan microservices, data access, cloud integration, security
- Implement - Create services with proper dependency injection and layered architecture
- Secure - Add Spring Security, OAuth2, method security, CORS configuration
- Test - Write unit, integration, and slice tests with high coverage
- Deploy - Configure for cloud deployment with health checks and observability
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Web Layer | references/web.md |
Controllers, REST APIs, validation, exception handling |
| Data Access | references/data.md |
Spring Data JPA, repositories, transactions, projections |
| Security | references/security.md |
Spring Security 6, OAuth2, JWT, method security |
| Cloud Native | references/cloud.md |
Spring Cloud, Config, Discovery, Gateway, resilience |
| Testing | references/testing.md |
@SpringBootTest, MockMvc, Testcontainers, test slices |
Constraints
What ships with it
5 files 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.
- 7d ago First seen · 95 lines · 43 tokens per session scan A cef67b5fc582
spring-boot-engineer is a skill published in the GitHub repository zacklecon/claude-skills (3 stars, last pushed yesterday), licensed MIT. It adds 43 tokens to every session and 906 once invoked, about $0.0002 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 2026-08-31.
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