Yuzu: Skill for Claude Code

.claude/skills/gateway-dialyzer/SKILL.md

gateway-dialyzer is a skill for Claude Code from DevNullLtd/Yuzu. It costs 64 tokens per session (982 once invoked), scanned C, original, AGPL-3.0.

A static-analysis check for the Yuzu Erlang gateway using Dialyzer and rebar3. Static analysis examines source code for type and consistency problems without running every program path.

In plain words
What is it for?
Use it after changing Erlang files in the gateway to run Dialyzer and confirm that the code has no reported type errors.
Why use it?
A successful compilation does not prove that Erlang types are used correctly. Running this check helps catch issues before a change is committed.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is DevNullLtd/Yuzu's own configuration. It tells Claude Code how to work on Yuzu itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Yuzu configures →

Reuse

Borrowing it

Nothing to install: this file belongs to DevNullLtd/Yuzu. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/DevNullLtd/Yuzu/main/.claude/skills/gateway-dialyzer/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/DevNullLtd/Yuzu

Made for: Claude Code.

Wrote 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.

agentmods badge for gateway-dialyzer

README.md
[![agentmods](https://agentmods.dev/badge/skills/devnullltd/yuzu/gateway-dialyzer/github.svg)](https://agentmods.dev/skills/devnullltd/yuzu/gateway-dialyzer)
Your own site
<a href="https://agentmods.dev/skills/devnullltd/yuzu/gateway-dialyzer"><img src="https://agentmods.dev/badge/skills/devnullltd/yuzu/gateway-dialyzer/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.

agentmods 80×15 button for gateway-dialyzer

Your own site · 80×15
<a href="https://agentmods.dev/skills/devnullltd/yuzu/gateway-dialyzer"><img src="https://agentmods.dev/badge/skills/devnullltd/yuzu/gateway-dialyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 982 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00064 $0.00982
Opus 5.5 $0.00026 $0.00393
Sonnet 5.5 $0.00013 $0.00196
Haiku 4.5 $0.00006 $0.00098

Measured 27d ago against content hash f99680a56075, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

gateway-dialyzer scanned grade C with 1 finding 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 27d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

| PLT-related errors after an OTP upgrade | Stale PLT from prior OTP version | `rm -rf gateway/_build/default/rebar3_*_plt` and rerun |
.claude/skills/gateway-dialyzer/SKILL.md · 59 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

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.

  1. 27d ago First seen · 59 lines · 64 tokens per session scan C f99680a56075

Subscribe to this mod's changes

gateway-dialyzer is a skill published in the GitHub repository DevNullLtd/Yuzu (19 stars, last pushed today), licensed AGPL-3.0. It adds 64 tokens to every session and 982 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-02.

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