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/301-frameworks-spring-boot-corenpx skills add jabrena/cursor-rules-examples --skill 301-frameworks-spring-boot-coregit 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/301-frameworks-spring-boot-core)<a href="https://agentmods.dev/skills/jabrena/cursor-rules-examples/301-frameworks-spring-boot-core"><img src="https://agentmods.dev/badge/skills/jabrena/cursor-rules-examples/301-frameworks-spring-boot-core.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 | $0.00083 | $0.00435 |
| Opus 5 | $0.00042 | $0.00217 |
| Sonnet 5 | $0.00017 | $0.00087 |
| Haiku 4.5 | $0.00008 | $0.00044 |
Grade A, and why
301-frameworks-spring-boot-core 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 4d 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
Spring Boot Core Guidelines
Apply Spring Boot Core guidelines for annotations, bean management, configuration, and dependency injection.
What is covered in this Skill?
- @SpringBootApplication and main application class
- Component annotations: @RestController, @Service, @Repository
- Bean definition, scoping, lifecycle
- Configuration classes and @ConfigurationProperties
- Component scanning and package organization
- Conditional configuration and profiles
- Constructor dependency injection
- Bean minimization and composition
- Scheduled tasks and background processing
Scope: Apply recommendations based on the reference rules and good/bad code examples.
Constraints
Before applying any Spring Boot 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 — compilation failure is a blocking condition
- VERIFY: Run
./mvnw clean verifyormvn clean verifyafter applying improvements - BEFORE APPLYING: Read the reference for detailed rules, good/bad patterns, and constraints
When to use this skill
- Review Java code for Spring Boot application
- Apply best practices for Spring Boot application in Java code
Reference
For detailed guidance, examples, and constraints, see references/301-frameworks-spring-boot-core.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.
- 4d ago First seen · 44 lines · 83 tokens per session scan A 57f480476830
301-frameworks-spring-boot-core is a skill published in the GitHub repository jabrena/cursor-rules-examples (2 stars, last pushed 9d ago), licensed Apache-2.0. It adds 83 tokens to every session and 435 once invoked, about $0.0004 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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