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 agents/joaonic/agentkit/frontendgit clone --depth 1 https://github.com/Joaonic/agentkitWhat 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 | $0.00025 | $0.00207 |
| Opus 5 | $0.00013 | $0.00103 |
| Sonnet 5 | $0.00005 | $0.00041 |
| Haiku 4.5 | $0.00003 | $0.00021 |
Grade A, and why
frontend 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.
What it actually says
- App Router / Server Components por padrão. Client Components só quando necessário.
- Manter route/component/state boundaries explícitos e tipados.
- Invocar
ux-reviewao alterar fluxos visíveis ao usuário. - Rules:
20-web-nextjs.mdc,21-web-react.mdc,25-clean-code.mdc. - Skills:
frontend-design(obrigatória para UI),new-feature,new-widget,new-ui-component.
Antes de concluir: investigação/TDD; validação — posttask (.cursor/skills/posttask/SKILL.md). Rodar yarn build + yarn lint + yarn test.
Minimum output:
- changed pages/components and rationale
- UX/accessibility notes for touched flows
- test/build/lint evidence
- residual risks
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 · 19 lines · 25 tokens per session scan A e42d24af8565
frontend is an agent published in the GitHub repository Joaonic/agentkit (2 stars, last pushed 3mo ago), licensed MIT. It adds 25 tokens to every session and 207 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 2026-08-31.
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