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 joaquimscosta/arkhe-claude-plugins --skill spring-boot-modulithgit clone --depth 1 https://github.com/joaquimscosta/arkhe-claude-pluginsWrote 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/joaquimscosta/arkhe-claude-plugins/spring-boot-modulith)<a href="https://agentmods.dev/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-modulith"><img src="https://agentmods.dev/badge/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-modulith/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.
<a href="https://agentmods.dev/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-modulith"><img src="https://agentmods.dev/badge/skills/joaquimscosta/arkhe-claude-plugins/spring-boot-modulith.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00109 | $0.00964 |
| Opus 5.5 | $0.00044 | $0.00386 |
| Sonnet 5.5 | $0.00022 | $0.00193 |
| Haiku 4.5 | $0.00011 | $0.00096 |
Grade A, and why
spring-boot-modulith 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 yesterday.
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 — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spring Modulith for Bounded Contexts
Implements DDD bounded contexts as application modules with enforced boundaries and event-driven communication.
Core Concepts
| Concept | Description |
|---|---|
| Application Module | Package-based boundary = bounded context |
| Module API | Types in base package (public) |
| Internal | Types in sub-packages (encapsulated) |
| Events | Cross-module communication mechanism |
Module Structure
src/main/java/
├── com.example/
│ └── Application.java ← @SpringBootApplication
├── com.example.order/ ← Module: order
│ ├── OrderService.java ← Public API
│ ├── OrderCreated.java ← Public event
│ ├── package-info.java ← @ApplicationModule config
│ └── internal/ ← Encapsulated
│ ├── OrderRepository.java
│ └── OrderEntity.java
├── com.example.inventory/ ← Module: inventory
│ ├── InventoryService.java
│ └── internal/
└── com.example.shipping/ ← Module: shipping
Types in com.example.order = public API
Types in com.example.order.internal = hidden from other modules
Quick Patterns
See EXAMPLES.md for complete working examples including:
- Module Configuration with @ApplicationModule
- Event Publishing with domain event records
- Event Handling with @ApplicationModuleListener (Java + Kotlin)
- Module Verification Test with PlantUML generation
- Event Externalization for Kafka/AMQP
Spring Boot 4 / Modulith 2.0 Specifics
- @ApplicationModuleListener combines
@Async+@Transactional(REQUIRES_NEW)+@TransactionalEventListener(AFTER_COMMIT) - Event Externalization with
@Externalizedannotation for Kafka/AMQP - JDBC event log ensures at-least-once delivery
Detailed References
- Examples: See EXAMPLES.md for complete working code examples
- Troubleshooting: See TROUBLESHOOTING.md for common issues and Boot 4 migration
- Workflow: See WORKFLOW.md for detailed step-by-step Modulith setup
- Module Structure: See references/MODULE-STRUCTURE.md for package conventions, named interfaces, dependency rules
- Event Patterns: See references/EVENTS.md for publishing, handling, externalization, testing with Scenario API
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.
- yesterday First seen · 92 lines · 109 tokens per session scan A 3348fdbc888f
spring-boot-modulith is a skill published in the GitHub repository joaquimscosta/arkhe-claude-plugins (21 stars, last pushed yesterday), licensed MIT. It adds 109 tokens to every session and 964 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 2026-10-16.
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