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 niels-emmer/myace --skill layered-architecturegit clone --depth 1 https://github.com/niels-emmer/myaceWrote 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/niels-emmer/myace/layered-architecture)<a href="https://agentmods.dev/skills/niels-emmer/myace/layered-architecture"><img src="https://agentmods.dev/badge/skills/niels-emmer/myace/layered-architecture/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/niels-emmer/myace/layered-architecture"><img src="https://agentmods.dev/badge/skills/niels-emmer/myace/layered-architecture.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 | $0.00022 | $0.00304 |
| Opus 5 | $0.00011 | $0.00152 |
| Sonnet 5 | $0.00004 | $0.00061 |
| Haiku 4.5 | $0.00002 | $0.00030 |
Grade A, and why
Layered Architecture 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.
What it actually says
Purpose
Prevent architectural drift in Spring Boot applications by enforcing clear layer boundaries.
Checklist
- Controller layer: handles HTTP concerns only (request mapping, validation, response serialization). Never contains business logic or data access.
- Service layer: contains business logic and transaction boundaries. Never returns JPA entities to controllers — use DTOs or projections.
- Repository layer: data access only. Spring Data JPA repositories or custom DAO implementations. Never contains business logic.
- DTO boundaries: controllers receive request DTOs and return response DTOs. Services receive and return domain objects or DTOs. Entities never cross the controller boundary.
- @Transactional: on service-layer methods, not controllers. Read-only transactions for query methods.
- Exception hierarchy: domain exceptions (extending
RuntimeException) caught at the controller boundary and mapped to appropriate HTTP status codes via@ControllerAdvice.
Expected output
A Spring Boot application where each layer has a single responsibility, entities never reach controllers, and exceptions are consistently mapped to HTTP responses.
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 · 25 lines · 22 tokens per session scan A 72d436ad2b91
Layered Architecture is a skill published in the GitHub repository niels-emmer/myace (1 stars, last pushed 4d ago), licensed MIT. It adds 22 tokens to every session and 304 once invoked, about $0.0001 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 2026-09-03.
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