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 Sounio-lang/sounio --skill sounio-checkgit clone --depth 1 https://github.com/Sounio-lang/sounioWrote 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/sounio-lang/sounio/sounio-check)<a href="https://agentmods.dev/skills/sounio-lang/sounio/sounio-check"><img src="https://agentmods.dev/badge/skills/sounio-lang/sounio/sounio-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/sounio-lang/sounio/sounio-check"><img src="https://agentmods.dev/badge/skills/sounio-lang/sounio/sounio-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 | $0.00020 | $0.00309 |
| Opus 5 | $0.00010 | $0.00154 |
| Sonnet 5 | $0.00004 | $0.00062 |
| Haiku 4.5 | $0.00002 | $0.00031 |
Grade A, and why
sounio-check 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 11d 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
Sounio Type-Check
Type-check the specified Sounio source file.
Instructions
-
Resolve the souc compiler binary:
- Use
$SOUC_BINor$SOUCenvironment variable if set - Otherwise try
soucon PATH - Otherwise try
./bin/souc - If none found, tell the user to set
SOUC_BIN
- Use
-
If no file argument given, find the most recently modified
.siofile in the working directory -
Run type-check:
$SOUC check <file> -
If the user asked for
--show-astor--show-types, pass those flags through -
Parse the output:
- If clean (exit 0, no stderr), report "Check passed"
- If errors, show them with file:line references and suggest fixes
- Common fixes: missing
witheffects,&mut→&!, semicolons, missing type annotations
-
If the error mentions a missing effect, suggest the correct
withclause based on what the function body does (IO for print, Mut for mutation, Div for division, Panic for indexing/assert)
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.
- 11d ago First seen · 35 lines · 20 tokens per session scan A cade6a20303a
sounio-check is a skill published in the GitHub repository Sounio-lang/sounio (6 stars, last pushed today), licensed Apache-2.0. It adds 20 tokens to every session and 309 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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