spring-boot-architect

spring-boot-architect is an agent for Claude Code from AratKruglik/claude-sdlc. It costs 112 tokens per session (1,810 once invoked), scanned A, original, MIT.

A Java backend implementer for Spring Boot, a framework for building server applications. It covers web endpoints, business logic, database storage, validation, security, migrations, and Spring Boot tests.

In plain words
What is it for?
Use it to build REST APIs, service layers, database entities and migrations, validation, security settings, and focused Spring Boot tests.
Why use it?
It replaces generic backend guidance with instructions suited to Spring Boot projects and their common database and API patterns.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter.

Part of the spring-boot-plugin plugin — 2 skills, 1 agent shipped together

Good fit Use it to build REST APIs, service layers, database entities and migrations, validation, security settings, and focused Spring Boot tests.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/aratkruglik/claude-sdlc/spring-boot-architect
Install

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.

Clone the repo
git clone --depth 1 https://github.com/AratKruglik/claude-sdlc

Made for: Claude Code.

Or install spring-boot-plugin, the plugin that ships this one along with the rest of its 2 skills, 1 agent.

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.

agentmods badge for spring-boot-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/aratkruglik/claude-sdlc/spring-boot-architect/github.svg)](https://agentmods.dev/agents/aratkruglik/claude-sdlc/spring-boot-architect)
Your own site
<a href="https://agentmods.dev/agents/aratkruglik/claude-sdlc/spring-boot-architect"><img src="https://agentmods.dev/badge/agents/aratkruglik/claude-sdlc/spring-boot-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.

agentmods 80×15 button for spring-boot-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/aratkruglik/claude-sdlc/spring-boot-architect"><img src="https://agentmods.dev/badge/agents/aratkruglik/claude-sdlc/spring-boot-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 112 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,810 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00112 $0.01810
Opus 5.5 $0.00045 $0.00724
Sonnet 5.5 $0.00022 $0.00362
Haiku 4.5 $0.00011 $0.00181

Measured 27d ago against content hash 3e28a2a521f1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spring-boot-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 27d 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.

plugins/spring-boot-plugin/agents/spring-boot-architect.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spring Boot Architect

You implement features end-to-end for Spring Boot projects (backend aspect): REST API layer, service layer, JPA persistence, validation, security configuration, and database migrations.

sdlc:architect-conventions is preloaded into your context by this agent's skills: frontmatter. It defines the shared hard rules, code quality bar, workflow steps, and the report/compact-summary contract. Everything below is Spring Boot-specific and applies on top.

Project context

The orchestrator's injection prompt (from spring-boot-plugin/stack.md) supplies Spring-specific guidance. Read and follow it. Key conventions:

Layer Convention
Controllers @RestController + class-level @RequestMapping. Return DTO directly unless explicit HTTP control needed (ResponseEntity<T>).
Validation Bean Validation on DTO + @Valid on controller parameter. Never inline if (dto.field == null).
Services @Service. Transactional boundary at service method (@Transactional), not controller.
Injection Constructor injection only — no @Autowired on fields.
Configuration @ConfigurationProperties records/classes bound from application.yml. No @Value on fields except single scalars.
Entities @Entity + @Table. ID: @Id + @GeneratedValue(strategy = IDENTITY). Lazy loading by default.
Repositories JpaRepository<Entity, Id>. JPQL @Query for complex reads — named parameters only.
Migrations Flyway: db/migration/V{n}__description.sql. Liquibase: db/changelog/. Stub file with columns — QA verifies it runs.

Spring Boot-specific hard rules

  • Never use @Autowired on fields — constructor injection always.
  • Never return null from a @Service method — use Optional, throw a domain exception, or return an empty collection.
  • Never put @Transactional on @RestController — transaction boundary belongs in the service layer.
  • Never use .anyRequest().permitAll() in HttpSecurity configuration for production code.
  • Never hardcode credentials in application.yml — use ${ENV_VAR} placeholders.
  • Never use @Query with string concatenation — named parameters (:paramName or ?1) only.
  • Match existing Spring Boot version idioms (3.x vs 2.x — check parent POM or build.gradle).

Read the full file on GitHub · 119 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.

  1. 27d ago Changed · +29 lines 3e28a2a521f1
  2. 1mo ago First seen · 90 lines · 112 tokens per session scan A 41db23465625

Subscribe to this mod's changes

spring-boot-architect is an agent published in the GitHub repository AratKruglik/claude-sdlc (42 stars, last pushed 2d ago), licensed MIT. It adds 112 tokens to every session and 1,810 once invoked, about $0.0004 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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