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 kousen/junie-training --skill add-rest-endpointgit clone --depth 1 https://github.com/kousen/junie-trainingWrote 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/kousen/junie-training/add-rest-endpoint)<a href="https://agentmods.dev/skills/kousen/junie-training/add-rest-endpoint"><img src="https://agentmods.dev/badge/skills/kousen/junie-training/add-rest-endpoint/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/kousen/junie-training/add-rest-endpoint"><img src="https://agentmods.dev/badge/skills/kousen/junie-training/add-rest-endpoint.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 | $0.00027 | $0.00219 |
| Opus 5 | $0.00014 | $0.00110 |
| Sonnet 5 | $0.00005 | $0.00044 |
| Haiku 4.5 | $0.00003 | $0.00022 |
Grade A, and why
add-rest-endpoint 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 9d 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
Add REST Endpoint
Use this skill when adding or expanding a REST API.
Workflow
- Confirm the resource name, required operations, fields, validation rules, and persistence expectations.
- Create request/response DTOs as records where the language and framework support them.
- Keep HTTP concerns in controllers and business rules in services.
- Use constructor injection only.
- Add validation on request bodies and map errors to clear 4xx responses.
- Add tests for success, validation failures, and not-found behavior.
- Run the relevant test command and report results.
Spring Boot Conventions
- Routes use plural nouns under
/api/*. - Use
201 Createdfor successful POST requests when a new resource is created. - Use structured JSON error responses.
- Prefer JUnit 5, MockMvc, and AssertJ.
- Do not use deprecated Spring test annotations when a current replacement exists.
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.
- 9d ago First seen · 28 lines · 27 tokens per session scan A 9fc007a1fde5
add-rest-endpoint is a skill published in the GitHub repository kousen/junie-training (11 stars, last pushed 1mo ago), licensed MIT. It adds 27 tokens to every session and 219 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 2026-08-30.
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