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 skills add mgiovani/cc-arsenal --skill i18n-checkgit clone --depth 1 https://github.com/mgiovani/cc-arsenalWrote 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/mgiovani/cc-arsenal/i18n-check)<a href="https://agentmods.dev/skills/mgiovani/cc-arsenal/i18n-check"><img src="https://agentmods.dev/badge/skills/mgiovani/cc-arsenal/i18n-check/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mgiovani/cc-arsenal/i18n-check"><img src="https://agentmods.dev/badge/skills/mgiovani/cc-arsenal/i18n-check.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00225 | $0.01959 |
| Opus 5.5 | $0.00090 | $0.00784 |
| Sonnet 5.5 | $0.00045 | $0.00392 |
| Haiku 4.5 | $0.00022 | $0.00196 |
Grade C, and why
i18n-check scanned grade C with 2 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 22d 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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
`curl -LsSf https://astral.sh/uv/install.sh | sh`). JSON-only projects can run it with Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
`curl -LsSf https://astral.sh/uv/install.sh | sh`). JSON-only projects can run it with How it starts
The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.
i18n Check
Finds the three ways translations silently rot: a key added to the default locale but never copied to the others (missing), a key copied but never translated (still reads identical to the source), and a key left behind in one locale after being renamed or removed from the default (orphan). Also catches new UI copy that was hardcoded instead of routed through the i18n layer in the first place: the most common way a translation key never gets created.
Step 1: Detect the framework
Look for these signals, in order, and stop at the first match:
| Signal | Framework | Locale file layout |
|---|---|---|
package.json has next-intl; i18n.ts/i18n/request.ts |
next-intl | messages/<locale>.json, nested |
package.json has i18next/react-i18next |
i18next | public/locales/<lang>/<ns>.json or src/locales/<lang>.json, nested |
package.json has react-intl |
react-intl | lang/<locale>.json, flat, or inline defineMessages (no files) |
package.json has vue-i18n |
vue-i18n | src/locales/<lang>.json/.yaml, or <i18n> SFC blocks |
manage.py + locale/<lang>/LC_MESSAGES/*.po |
Django gettext | .po catalogs, source strings live in code |
Gemfile + config/locales/*.yml |
Rails I18n | YAML keyed by locale at the top level |
If two signals match (e.g. a monorepo with a Rails API and a Vue frontend), run this skill once per app, not once for the whole repo: their locale files don't overlap.
Read references/frameworks.md for the exact default-locale detection and the
flatten/diff one-liner for whichever framework you found. Every framework's diff
reduces to the same three sets (missing / untranslated / orphan) even though the file
format differs.
Step 2: Diff every locale against the default
Run the bundled script rather than comparing by eye:
uv run <skill-dir>/scripts/i18n_diff.py messages/en.json messages/pt-BR.json messages/de.json
uv runs it with PyYAML resolved from the script header (install uv with
curl -LsSf https://astral.sh/uv/install.sh | sh). JSON-only projects can run it with
plain python3 instead. It takes the default locale file first, then any number of
other locale files (JSON nested or flat, YAML), and prints per locale:
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 22d ago Changed · +18 lines scan A → C 07b6f627f635
- 1mo ago Changed b068616e3643
- 1mo ago Changed · +1 lines 6afdb3258bba
- 1mo ago First seen · 135 lines · 225 tokens per session scan A 489a4dd4c473
i18n-check is a skill published in the GitHub repository mgiovani/cc-arsenal (8 stars, last pushed 2d ago), licensed MIT. It adds 225 tokens to every session and 1,959 once invoked, about $0.0009 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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