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/snk-devcenter/addon-studio/controller-advicenpx skills add snk-devcenter/addon-studio --skill controller-advicegit clone --depth 1 https://github.com/snk-devcenter/addon-studioWhat 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 | $0.00155 | $0.01712 |
| Opus 5 | $0.00077 | $0.00856 |
| Sonnet 5 | $0.00031 | $0.00342 |
| Haiku 4.5 | $0.00015 | $0.00171 |
Grade A, and why
controller-advice 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 yesterday.
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 — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tratamento Global de Excecoes (@ControllerAdvice) — Addon Studio 2.0
@ControllerAdvice centraliza tratamento de excecoes de todos @Controller. Excecao capturada = rollback automatico da transacao ativa.
1. Anatomia
import br.com.sankhya.studio.web.ControllerAdvice;
import br.com.sankhya.studio.web.ExceptionHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
@ControllerAdvice
public class GlobalExceptionHandler {
private static final Logger log = Logger.getLogger(GlobalExceptionHandler.class.getName());
@ExceptionHandler({ObjectNotFoundException.class})
public ErrorResponse handleNotFound(ObjectNotFoundException e) {
log.log(Level.INFO, "Recurso nao encontrado: {0}", e.getMessage());
return new ErrorResponse("NOT_FOUND", e.getMessage(), 404);
}
@ExceptionHandler({IllegalArgumentException.class, ValidationException.class})
public ErrorResponse handleValidation(Exception e) { // parametro mais generico — OK
log.log(Level.WARNING, "Validacao falhou", e);
return new ErrorResponse("BAD_REQUEST", e.getMessage(), 400);
}
}
2. Regras criticas
Retorno NUNCA pode ser void
@ExceptionHandler deve retornar objeto ou primitivo — sera serializado para JSON via Gson. void causa erro de compilacao.
// PROIBIDO
@ExceptionHandler({MinhaException.class})
public void handle(MinhaException e) { ... }
// CORRETO
@ExceptionHandler({MinhaException.class})
public ErrorResponse handle(MinhaException e) {
return new ErrorResponse(...);
}
Multiplas excecoes no mesmo handler
@ExceptionHandler aceita array de classes:
@ExceptionHandler({IOException.class, SQLException.class, TimeoutException.class})
public ErrorResponse handleInfra(Exception e) {
return new ErrorResponse("INFRA_ERROR", "Falha temporaria.", 503);
}
Parametro pode ser superclasse das excecoes declaradas
Util quando varias excecoes compartilham tratamento:
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.
- yesterday First seen · 194 lines · 155 tokens per session scan A d2cd8c616401
controller-advice is a skill published in the GitHub repository snk-devcenter/addon-studio (5 stars, last pushed yesterday), licensed MIT. It adds 155 tokens to every session and 1,712 once invoked, about $0.0008 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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