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/business-rulenpx skills add snk-devcenter/addon-studio --skill business-rulegit clone --depth 1 https://github.com/snk-devcenter/addon-studioWrote 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/snk-devcenter/addon-studio/business-rule)<a href="https://agentmods.dev/skills/snk-devcenter/addon-studio/business-rule"><img src="https://agentmods.dev/badge/skills/snk-devcenter/addon-studio/business-rule.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 | $0.00200 | $0.03642 |
| Opus 5 | $0.00100 | $0.01821 |
| Sonnet 5 | $0.00040 | $0.00728 |
| Haiku 4.5 | $0.00020 | $0.00364 |
Grade A, and why
business-rule 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 — 325 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Regra de Negocio (@BusinessRule) — Addon Studio 2.0
@BusinessRule implementa logica automatica disparada por eventos do ciclo de vida comercial — principalmente confirmacao e faturamento de documentos (Pedidos, Notas de Venda). Disponivel a partir do Addon Studio 2.0.
Referencias complementares:
dependency-injection— Injecao de dependencia (Guice)
1. Quando usar — @BusinessRule vs @Callback vs @Listener
| Hook | Escopo | Quando usar |
|---|---|---|
@BusinessRule |
Notas de Saida e Mov. Interna (Vendas, Remessas, etc.) | Logica que interage com barramento de regras (ContextoRegra): liberacoes de limite, validacoes complexas na confirmacao/faturamento. |
@Callback |
Todos documentos comerciais, incluindo Notas de Entrada | Eventos de negocio onde @BusinessRule nao atua (ex: notas de compra) ou quando barramento nao e necessario. |
@Listener |
Operacoes CRUD (insert/update/delete) em qualquer entidade | Validacoes e modificacoes de campo disparadas ao salvar/excluir. Preferir para CRUD simples. |
Regra rapida:
- Liberacao de limite em nota de venda?
@BusinessRule. - Validar nota de compra na confirmacao?
@Callback. - Logica ao salvar/excluir qualquer registro?
@Listener.
2. Anatomia de um @BusinessRule
import br.com.sankhya.jape.vo.DynamicVO;
import br.com.sankhya.modelcore.comercial.Regra;
import br.com.sankhya.modelcore.comercial.ContextoRegra;
import br.com.sankhya.studio.annotations.hooks.BusinessRule;
import com.google.inject.Inject;
@BusinessRule(description = "Valida desconto na confirmacao")
public class ValidacaoDescontoRegra implements Regra {
private final DescontoService descontoService;
@Inject
public ValidacaoDescontoRegra(DescontoService descontoService) {
this.descontoService = descontoService;
}
@Override
public void beforeUpdate(ContextoRegra ctx) throws Exception {
DynamicVO notaVO = (DynamicVO) ctx.getPrePersistEntityState().getNewVO();
// logica de negocio delegada ao Service
descontoService.validar(notaVO, ctx.getBarramentoRegra());
}
// A interface exige os 6 metodos (sem default) — deixe vazios os que nao usar
@Override public void beforeInsert(ContextoRegra ctx) throws Exception {}
@Override public void afterInsert(ContextoRegra ctx) throws Exception {}
@Override public void afterUpdate(ContextoRegra ctx) throws Exception {}
@Override public void beforeDelete(ContextoRegra ctx) throws Exception {}
@Override public void afterDelete(ContextoRegra ctx) throws Exception {}
}
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 Changed · -1 lines 53cb8021ec0e
- 5d ago First seen · 326 lines · 200 tokens per session scan A 2a0a1dc1e201
business-rule is a skill published in the GitHub repository snk-devcenter/addon-studio (5 stars, last pushed yesterday), licensed MIT. It adds 200 tokens to every session and 3,642 once invoked, about $0.0010 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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