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fastmcp-ts: Skill for Claude Code

.claude/skills/writing-documentation/SKILL.md

writing-documentation is a skill for Claude Code from PrefectHQ/fastmcp-ts. It costs 164 tokens per session (5,168 once invoked), scanned A, original, no licence file.

A writing guide for creating and maintaining technical documentation, such as tutorials, API references, feature guides, and code comments.

In plain words
What is it for?
Use it when writing, revising, reorganizing, or reviewing documentation for developers or users.
Why use it?
It helps keep documentation clear, useful, and consistent across individual pages and larger documentation sets.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is PrefectHQ/fastmcp-ts's own configuration. It tells Claude Code how to work on fastmcp-ts 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 fastmcp-ts configures →

not rated 81repo yesterday A scan 164 tokens no licence
View source ↗ PrefectHQ/fastmcp-ts fastmcp-ts.docs.prefect.io
Reuse

Borrowing it

Nothing to install: this file belongs to PrefectHQ/fastmcp-ts. 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/PrefectHQ/fastmcp-ts/main/.claude/skills/writing-documentation/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/PrefectHQ/fastmcp-ts

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 writing-documentation

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/prefecthq/fastmcp-ts/writing-documentation"><img src="https://agentmods.dev/badge/skills/prefecthq/fastmcp-ts/writing-documentation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 164 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,168 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.
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 $0.00164 $0.05168
Opus 5.5 $0.00066 $0.02067
Sonnet 5.5 $0.00033 $0.01034
Haiku 4.5 $0.00016 $0.00517

Measured 2mo ago against content hash 1cab6d7fcf2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

writing-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.

.claude/skills/writing-documentation/SKILL.md · 256 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 2mo ago First seen · 256 lines · 164 tokens per session scan A 1cab6d7fcf2f

Subscribe to this mod's changes

writing-documentation is a skill published in the GitHub repository PrefectHQ/fastmcp-ts (81 stars, last pushed yesterday), with no licence file. It adds 164 tokens to every session and 5,168 once invoked, about $0.0007 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.

Writing and docsagentsaijavascriptllmsmcpmcp-apps
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