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.
git clone --depth 1 https://github.com/s0vers/next-app-i18n-starterWrote 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/s0vers/next-app-i18n-starter/i18n)<a href="https://agentmods.dev/rules/s0vers/next-app-i18n-starter/i18n"><img src="https://agentmods.dev/badge/rules/s0vers/next-app-i18n-starter/i18n.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 5.1 | $0.00000 | $0.00392 |
| Opus 5 | $0.00000 | $0.00196 |
| Sonnet 5 | $0.00000 | $0.00078 |
| Haiku 4.5 | $0.00000 | $0.00039 |
Grade A, and why
i18n scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Internationalization
Routing (src/i18n/routing.ts)
- Locales:
en,ar,zh,es,ja— defaulten,localePrefix: "as-needed". - English URLs have no prefix (
/not/en). Add locales insrc/i18n/locales.tsonly (localeConfig); routing, regional, OG, and switcher derive from it.
Navigation
// ✅ Use
import { Link, useRouter, usePathname, getPathname } from "@/i18n/navigation";
// ❌ Avoid for locale-aware routes
import Link from "next/link";
import { useRouter } from "next/navigation";
Dictionaries (dictionary/{locale}.json)
en.jsonis the type source of truth (global.d.ts→IntlMessages).- Adding a key to
en.jsonrequires the same key in every locale file. - Namespaces in use:
Index,Footer,Metadata,Localization— add new namespaces to all files.
Request config (src/i18n/request.ts)
- Currency and timezone come from
src/i18n/regional.tsper locale — no user override dropdowns. - Messages loaded via dynamic import:
dictionary/${locale}.json.
Components
- Server:
setRequestLocale(locale)+getTranslations({ locale, namespace }). - Client:
useTranslations,useFormatter,useTimeZone,useNowfromnext-intl. - Proxy:
src/proxy.ts(Next.js 16 locale middleware) — do not recreate asmiddleware.ts.
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.
- 8d ago First seen · 41 lines · 0 tokens per session scan A 0cdac1b79bb2
i18n is a cursor rule published in the GitHub repository s0vers/next-app-i18n-starter (64 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 392 tokens. 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.
Other cursor rules, from other repositories
i18n-guide
Response language rules for agents and workflows.
components
React component architecture for creating composable, accessible components with data attributes. Use when creating/updating composable components, not for higher-level feature/page components.
react
React patterns with destructured props, compiler optimization, Effects, and Tailwind v4 syntax. ALWAYS use when using React.
browser-debug-setup
One-time setup for a persistent debug browser on 127.0.0.1:9222 for dev-browser --connect. Use when browser work is needed but no reusable debug browser is running yet.
dev-browser
Fallback browser automation with persistent Chrome state. Use only when Browser Use is unavailable or blocked.
frontend-rules
Cursor rule "frontend-rules" from robotostudio/turbo-start-sanity, covering component structure and internationalization rules.