A collection of WebAssembly development skills covering Wasmtime, WIT, the WebAssembly component model, compiling guest code, and embedding WebAssembly in host programs. WebAssembly is a portable binary format for running code in controlled environments; Wasmtime is a runtime that executes it.

Use it to compile Rust or Zig to WebAssembly, work with WASI and components, define WIT interfaces, run modules with Wasmtime, or embed Wasmtime in Rust or Elixir programs.

It provides guidance for the main pieces involved in building and running WebAssembly applications, including communication between WebAssembly code and host programs.

wasm — Plugin for Claude Code by vinnie357

Install

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.

Clone the repo

git clone --depth 1 https://github.com/vinnie357/claude-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/vinnie357/claude-skills/wasm/github.svg)](https://agentmods.dev/plugins/vinnie357/claude-skills/wasm)

Your own site

<a href="https://agentmods.dev/plugins/vinnie357/claude-skills/wasm"><img src="https://agentmods.dev/badge/plugins/vinnie357/claude-skills/wasm/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/vinnie357/claude-skills/wasm"><img src="https://agentmods.dev/badge/plugins/vinnie357/claude-skills/wasm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 2 skills, 1 command, 1 agent cost 121 tokens a session between them.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

wasm 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 4d 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.

plugins/wasm/.claude-plugin/plugin.json · 26 lines

What it actually says

{
  "name": "wasm",
  "version": "0.1.11",
  "description": "WebAssembly skills: wasmtime runtime, component model, guest compilation, and host embedding",
  "author": {
    "name": "vinnie357"
  },
  "repository": "https://github.com/vinnie357/claude-skills",
  "license": "MIT",
  "keywords": [
    "wasm",
    "webassembly",
    "wasmtime",
    "wasi",
    "component-model",
    "wit"
  ],
  "skills": [
    "./skills/wasmtime",
    "./skills/wit"
  ],
  "agents": [
    "./agents/wasm-inspector.md"
  ]
}

Contents

What it installs

The manifest is a name and a version. 2 skills, 1 command, 1 agent travel with it, and installing the plugin installs all of them — 121 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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.

4d ago First seen · 26 lines scan A f7fee92574f5

Subscribe to this mod's changes

wasm is a plugin published in the GitHub repository vinnie357/claude-skills (25 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-04.

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