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/jabrena/cursor-rules-examples/302-frameworks-spring-boot-restnpx skills add jabrena/cursor-rules-examples --skill 302-frameworks-spring-boot-restgit clone --depth 1 https://github.com/jabrena/cursor-rules-examplesWrote 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/jabrena/cursor-rules-examples/302-frameworks-spring-boot-rest)<a href="https://agentmods.dev/skills/jabrena/cursor-rules-examples/302-frameworks-spring-boot-rest"><img src="https://agentmods.dev/badge/skills/jabrena/cursor-rules-examples/302-frameworks-spring-boot-rest.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 | $0.00067 | $0.00389 |
| Opus 5 | $0.00034 | $0.00195 |
| Sonnet 5 | $0.00013 | $0.00078 |
| Haiku 4.5 | $0.00007 | $0.00039 |
Grade A, and why
302-frameworks-spring-boot-rest 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.
What it actually says
Java REST API Design Principles
Apply REST API design principles for Spring Boot applications.
What is covered in this Skill?
- HTTP methods (GET, POST, PUT, PATCH, DELETE)
- Resource URI design
- HTTP status codes
- Request/response DTOs
- API versioning
- Error handling
- API security
- Documentation (OpenAPI)
- Controller advice and problem details
Scope: Apply recommendations based on the reference rules and good/bad code examples.
Constraints
Before applying any REST API changes, ensure the project compiles. If compilation fails, stop immediately. After applying improvements, run full verification.
- MANDATORY: Run
./mvnw compileormvn compilebefore applying any change - SAFETY: If compilation fails, stop immediately
- VERIFY: Run
./mvnw clean verifyormvn clean verifyafter applying improvements - BEFORE APPLYING: Read the reference for detailed rules and good/bad patterns
When to use this skill
- Review Java code for Spring Boot REST API
- Apply best practices for Spring Boot REST API in Java code
Reference
For detailed guidance, examples, and constraints, see references/302-frameworks-spring-boot-rest.md.
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.
- 5d ago First seen · 44 lines · 67 tokens per session scan A bda009ce1782
302-frameworks-spring-boot-rest is a skill published in the GitHub repository jabrena/cursor-rules-examples (2 stars, last pushed 9d ago), licensed Apache-2.0. It adds 67 tokens to every session and 389 once invoked, about $0.0003 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 2026-08-31.
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