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 kouroshez/coding-os --skill spring-bootgit clone --depth 1 https://github.com/kouroshez/coding-osWrote 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/kouroshez/coding-os/spring-boot)<a href="https://agentmods.dev/skills/kouroshez/coding-os/spring-boot"><img src="https://agentmods.dev/badge/skills/kouroshez/coding-os/spring-boot.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 | $0.00119 | $0.00972 |
| Opus 5 | $0.00060 | $0.00486 |
| Sonnet 5 | $0.00024 | $0.00194 |
| Haiku 4.5 | $0.00012 | $0.00097 |
Grade A, and why
spring-boot 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 3d 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 — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
REQUIRED BACKGROUND: You MUST also follow the core clean-code and
backend-fundamentals skills. This skill adds Spring Boot-specific patterns on
top.
spring-boot
Layer contract (matches structure.tree)
| Layer | May import | Never |
|---|---|---|
*Controller.java (@RestController) |
the feature service, DTOs | repositories, other controllers |
*Service.java (@Service) |
repositories, other services | HttpServletRequest/ServletResponse, transport types |
*Repository.java (@Repository) |
the EntityManager / Spring Data |
services, controllers |
common/ (advice/filters) |
services (for auth lookups) | repositories |
Services stay transport-free — no HttpServletRequest — so they are
unit-testable and a transport swap (Spring MVC → WebFlux → messaging listener) is
a controller-layer-only change.
DI & wiring
- Inject collaborators by constructor into
finalfields; nevernewa bean and never use field injection (@Autowiredon a field) — both bypass the container and break test overrides. @SpringBootApplicationowns wiring only, not business logic. Component scanning discovers@RestController/@Service/@Repositorybeans in the base package and below — there is no manual registration step.- Bean scopes: the default singleton for stateless services/repositories; only
reach for
@Scope("prototype")/request scope when state genuinely demands it. A singleton holding mutable request state is a bug. - Keep the bootstrap class reachable so
@SpringBootTestbuilds the context without binding a real port (webEnvironment = RANDOM_PORTorMOCK).
Controllers (thin)
- A handler binds/validates the
@ValidDTO → calls ONE service method → returns the value (Spring serializes). Do not build the response envelope by hand; return a typed record orResponseEntity<T>when you need to set status/headers. - No try/catch for error shaping in a controller — throw a typed exception (a
domain exception or
ResponseStatusException) and let the global advice shape it.
What ships with it
1 file 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.
- 3d ago First seen · 85 lines · 119 tokens per session scan A d2d0a0b6adfe
spring-boot is a skill published in the GitHub repository kouroshez/coding-os (6 stars, last pushed 6d ago), licensed Apache-2.0. It adds 119 tokens to every session and 972 once invoked, about $0.0006 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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