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 mvilrokx/claude-skills --skill docs-fetchergit clone --depth 1 https://github.com/mvilrokx/claude-skillsWrote 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/mvilrokx/claude-skills/docs-fetcher)<a href="https://agentmods.dev/skills/mvilrokx/claude-skills/docs-fetcher"><img src="https://agentmods.dev/badge/skills/mvilrokx/claude-skills/docs-fetcher/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/mvilrokx/claude-skills/docs-fetcher"><img src="https://agentmods.dev/badge/skills/mvilrokx/claude-skills/docs-fetcher.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 | $0.00079 | $0.00441 |
| Opus 5 | $0.00039 | $0.00220 |
| Sonnet 5 | $0.00016 | $0.00088 |
| Haiku 4.5 | $0.00008 | $0.00044 |
Grade A, and why
docs-fetcher 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 10d 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
Docs Fetcher
Fetch current documentation for libraries to ensure accurate, up-to-date code generation.
Workflow
Trigger Detection
Activate this skill when:
- User explicitly requests: "use docs", "fetch docs for X", "check X documentation"
- User asks about specific API methods, parameters, or patterns for a supported library
- Generating code where version-specific accuracy is critical
Execution Steps
- Identify the library from user request or code context
- Look up documentation URLs in references/libraries.md
- Fetch relevant pages using
fetch_webpagetool with appropriate URLs - Use fetched content to inform code generation or answer
Fetching Strategy
For comprehensive coverage, fetch multiple pages:
fetch_webpage(urls: [
"https://fastapi.tiangolo.com/tutorial/dependencies/",
"https://fastapi.tiangolo.com/advanced/advanced-dependencies/"
])
For quick lookups, fetch the most relevant single page.
Adding Libraries
To add a new library, edit references/libraries.md:
- Find the official documentation URL
- Identify key pages: quickstart, API reference, common patterns
- Add entry following the existing format
Limitations
- Fetches only explicitly listed URLs (no recursive crawling)
- Some documentation sites may block or limit fetches
- Very large pages may be truncated
- No version pinning — fetches current docs
When NOT to Use
- General programming questions not library-specific
- Libraries not in the mapping (inform user, suggest they provide URLs)
- Simple questions where training knowledge is sufficient
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 10d ago First seen · 60 lines · 79 tokens per session scan A 7f80a47fded0
docs-fetcher is a skill published in the GitHub repository mvilrokx/claude-skills (2 stars, last pushed 6mo ago), licensed MIT. It adds 79 tokens to every session and 441 once invoked, about $0.0004 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.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
local-ai-agents
Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…
next-cache-components-adoption
Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…
insight-error-page
Write or audit an insight-kind error page for the Next.js dev overlay. Use when creating a new errors/ .mdx page, auditing an existing one, or checking that a page matches the framework fix cards. Covers page structure, title alignment, FixCard cards with Copy prompt button, code snippets, terminology verification…
next-cache-components-optimizer
Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…
next-partial-prefetching-adoption
Turn on Partial Prefetching in a Next.js app and work through the insights it surfaces. Use when the user wants to enable or adopt Partial Prefetching, flip the partialPrefetching flag, opt routes in with export const prefetch = 'partial', audit Link prefetch={true} behavior, preserve existing prefetched UI with…