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/kousen/claude-code-training/spring-servicenpx skills add kousen/claude-code-training --skill spring-servicegit clone --depth 1 https://github.com/kousen/claude-code-trainingWhat 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 | $0.00034 | $0.00315 |
| Opus 5 | $0.00017 | $0.00158 |
| Sonnet 5 | $0.00007 | $0.00063 |
| Haiku 4.5 | $0.00003 | $0.00032 |
Grade A, and why
spring-service 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.
What it actually says
Spring Service Scaffold
Generate a $ARGUMENTSService with:
@Serviceannotation- Constructor injection of
$ARGUMENTSRepository (no field@Autowired) - CRUD methods:
findAll(),findById(id),create(request),update(id, request),delete(id) - Domain exceptions (e.g.,
EntityNotFoundException) thrown for missing-by-id; let@ControllerAdvicetranslate to HTTP if present - SLF4J logging at meaningful boundaries — entry on writes, warn on validation rejection, debug on reads
- Unit tests using JUnit 5 + Mockito, with
@MockitoBeanand@MockitoSpyBeanwhere appropriate - Use modern Java idioms (records for DTOs, pattern matching,
varwhere readable)
Constraints
- Match the existing project package layout
- Don't introduce
Lombokif the project doesn't already use it - If the project uses MapStruct, generate a mapper interface; otherwise, write the mapping inline
- Tests should cover happy path, not-found, and at least one validation/edge case per write method
Usage: /spring-service User → UserService, UserServiceTest
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 · 29 lines · 34 tokens per session scan A 7fcb4dac738d
spring-service is a skill published in the GitHub repository kousen/claude-code-training (335 stars, last pushed 6d ago), licensed MIT. It adds 34 tokens to every session and 315 once invoked, about $0.0002 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 2026-08-30.
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