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/virastack/ai/i18ngit clone --depth 1 https://github.com/virastack/aiWhat 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 | $0.00000 | $0.00323 |
| Opus 5 | $0.00000 | $0.00161 |
| Sonnet 5 | $0.00000 | $0.00065 |
| Haiku 4.5 | $0.00000 | $0.00032 |
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 2d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- i18n — 100% identical, 0 lines differ
What it actually says
Internationalization (i18n)
Constraints
- Library Selection: Delegate specific hook/method usage to the framework constitution (
nextjs.mdcortanstack-start.mdc). - Keys: Use flat or max 3-level deep JSON structures. Use
camelCasefor keys. - SSOT: All translation keys MUST be defined in
src/messages/. - Type Safety: Use the library's native type-generation features. Magic strings for keys are forbidden.
- Namespacing: Use namespaces for features (e.g.,
auth.login,profile.settings) to maintain modularity.
Bans
- Hardcoded strings in UI components.
- Dynamic key construction (e.g.,
t("prefix." + variable)). - Reading locale via
window.locationor manual URL parsing. - JSON hierarchy deeper than 3 levels.
- Async translation loading that causes layout shifts.
Correct Implementation
Incorrect Implementation
// BAN: Dynamic key generation const label = t("welcome_" + type);
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.
- 2d ago First seen · 41 lines · 0 tokens per session scan A 03dfd0015e81
i18n is a cursor rule published in the GitHub repository virastack/ai (23 stars, last pushed 26d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 323 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.
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