wassette: Skill for Claude Code

.agents/skills/documentation/SKILL.md

documentation is a skill for Claude Code from microsoft/wassette. It costs 49 tokens per session (411 once invoked), scanned A, original, MIT.

A guide for building and writing Wassette documentation with mdBook, a tool that turns Markdown files into a browsable documentation website.

In plain words
What is it for?
Use it to edit documentation pages, update SUMMARY.md navigation, build or serve the docs locally, and follow Wassette’s multi-version layout and writing rules.
Why use it?
It keeps documentation pages, navigation, versioned URLs, code examples, and local previews consistent with the project’s conventions.

Skill for Claude Code ✓ vendor

Written for Claude Code: allowed-tools in frontmatter. Also seen: installed under .agents/ (shared by several agents).

This is microsoft/wassette's own configuration. It tells Claude Code how to work on wassette 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 wassette configures →

About the project

microsoft/wassette is a runtime that loads WebAssembly Components as tools exposed through the Model Context Protocol (MCP), an interface that lets AI agents use external capabilities. It is for extending coding agents with reusable tools while isolating those tools in a Wasmtime security sandbox. The catalogue skills, instructions, and agent help configure and operate Wassette with supported MCP clients.

microsoft/wassette · 972 stars · on GitHub · microsoft.github.io

Reuse

Borrowing it

Nothing to install: this file belongs to microsoft/wassette. 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/microsoft/wassette/main/.agents/skills/documentation/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/microsoft/wassette

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 documentation

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/wassette/documentation/github.svg)](https://agentmods.dev/skills/microsoft/wassette/documentation)
Your own site
<a href="https://agentmods.dev/skills/microsoft/wassette/documentation"><img src="https://agentmods.dev/badge/skills/microsoft/wassette/documentation/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 documentation

Your own site · 80×15
<a href="https://agentmods.dev/skills/microsoft/wassette/documentation"><img src="https://agentmods.dev/badge/skills/microsoft/wassette/documentation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 411 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original 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 $0.00049 $0.00411
Opus 5.5 $0.00020 $0.00164
Sonnet 5.5 $0.00010 $0.00082
Haiku 4.5 $0.00005 $0.00041

Measured 2mo ago against content hash 9cc902d49fa9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

documentation 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 2mo 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.

.agents/skills/documentation/SKILL.md · 50 lines

What it actually says

documentation skill

Wassette documentation lives under docs/ and is built with mdBook.

Build and serve

just docs-build    # Build static HTML to docs/book/
just docs-watch    # Serve at http://localhost:3000 with live reload
just docs-serve    # Serve and open in the browser

Or directly: cd docs && mdbook serve / mdbook build.

URL structure

Production uses a multi-version layout that mdbook serve does not reproduce locally:

  • Local: open http://localhost:3000/overview.html (or a specific page). The version picker and the root redirect only work in production.
  • Production: https://microsoft.github.io/wassette/latest/ (and /v0.3.0/ for releases).

Writing style

  • Prefer working code examples over long prose; explain details second.
  • Keep pages focused and concise; every sentence should add value.
  • Use active voice and present tense; define acronyms on first use.
  • Always set the language on code blocks; use descriptive link text.

Visual changes

Preview layout or presentation changes locally. Include screenshots when they help reviewers understand a meaningful visual difference.

Adding a page

  1. Create the markdown file in the right docs/ subdirectory.
  2. Register it in docs/SUMMARY.md so it appears in navigation.
  3. Match existing structure and formatting; test all links.
  4. Preview locally with just docs-serve.
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. 2mo ago First seen · 50 lines · 49 tokens per session scan A 9cc902d49fa9

Subscribe to this mod's changes

documentation is a skill published in the GitHub repository microsoft/wassette (972 stars, last pushed 2d ago), licensed MIT. It adds 49 tokens to every session and 411 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.

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