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 rules/cmaranho/rn-agent-skills/error-handlinggit clone --depth 1 https://github.com/cmaranho/rn-agent-skillsWrote 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/rules/cmaranho/rn-agent-skills/error-handling)<a href="https://agentmods.dev/rules/cmaranho/rn-agent-skills/error-handling"><img src="https://agentmods.dev/badge/rules/cmaranho/rn-agent-skills/error-handling.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 | $0.00155 | $0.00155 |
| Opus 5 | $0.00077 | $0.00077 |
| Sonnet 5 | $0.00031 | $0.00031 |
| Haiku 4.5 | $0.00015 | $0.00015 |
Grade A, and why
error-handling 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
Tratamento de Erros
- Camada de dados retorna resultado tipado (sucesso/erro); não lança exceção crua.
- Erros de domínio são tipados e carregam contexto (valor problemático + shape esperado).
- Todo caso de erro previsível é tratado explicitamente (rede, timeout, 4xx, 5xx, offline).
- UI sempre reflete o erro: estado de erro, mensagem clara e ação de recuperação.
- Sem
catchvazio ou que engole o erro silenciosamente. - Falhas inesperadas capturadas por error boundary e reportadas.
- Mensagens ao usuário são claras, sem expor detalhes técnicos internos.
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 · 15 lines · 155 tokens per session scan A 83204ba77d3b
error-handling is a cursor rule published in the GitHub repository cmaranho/rn-agent-skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 155 tokens to every session, 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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