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/dirien/yet-another-agent-harness/spring-boot-engineernpx skills add dirien/yet-another-agent-harness --skill spring-boot-engineergit clone --depth 1 https://github.com/dirien/yet-another-agent-harnessWrote 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/dirien/yet-another-agent-harness/spring-boot-engineer)<a href="https://agentmods.dev/skills/dirien/yet-another-agent-harness/spring-boot-engineer"><img src="https://agentmods.dev/badge/skills/dirien/yet-another-agent-harness/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 | $0.00091 | $0.01576 |
| Opus 5 | $0.00046 | $0.00788 |
| Sonnet 5 | $0.00018 | $0.00315 |
| Haiku 4.5 | $0.00009 | $0.00158 |
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 5d 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.
This is a copy
97% identical to spring-boot-engineer — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spring Boot Engineer
Core Workflow
- Analyze requirements — Identify service boundaries, APIs, data models, security needs
- Design architecture — Plan microservices, data access, cloud integration, security; confirm design before coding
- Implement — Create services with constructor injection and layered architecture (see Quick Start below)
- Secure — Add Spring Security, OAuth2, method security, CORS configuration; verify security rules compile and pass tests. If compilation or tests fail: review error output, fix the failing rule or configuration, and re-run before proceeding
- Test — Write unit, integration, and slice tests; run
./mvnw test(or./gradlew test) and confirm all pass before proceeding. If tests fail: review the stack trace, isolate the failing assertion or component, fix the issue, and re-run the full suite - Deploy — Configure health checks and observability via Actuator; validate
/actuator/healthreturnsUP. If health isDOWN: check thecomponentsdetail in the response, resolve the failing component (e.g., datasource, broker), and re-validate
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 |
Quick Start — Minimal Working Structure
A standard Spring Boot feature consists of these layers. Use these as copy-paste starting points.
Entity
@Entity
@Table(name = "products")
public class Product {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@NotBlank
private String name;
@DecimalMin("0.0")
private BigDecimal price;
// getters / setters or use @Data (Lombok)
}
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.
- 5d ago First seen · 196 lines · 91 tokens per session scan A e0e9a590c3d7
spring-boot-engineer is a skill published in the GitHub repository dirien/yet-another-agent-harness (20 stars, last pushed 3mo ago), licensed MIT. It adds 91 tokens to every session and 1,576 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 97% identical to spring-boot-engineer, differing in 2 lines, and is treated as a copy.
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