surfskills.surf: Instructions file for Claude Code

CLAUDE.md

surfskills.surf CLAUDE.md is an instructions file for Claude Code from eph5xx/surfskills.surf. It costs 1,237 tokens per session, scanned A, original, MIT.

Repository-specific instructions for working on surfskills.surf, a directory of open-source AI agent skills. They describe its Astro website, deployment setup, commands, Git process, and environment variables.

In plain words
What is it for?
Developing, checking, previewing, and deploying the surfskills.surf site while following its Git and environment rules.
Why use it?
They give a coding agent the project context it needs, reducing mistakes with local commands, branches, builds, and secrets.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is eph5xx/surfskills.surf's own configuration. It tells Claude Code how to work on surfskills.surf 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 surfskills.surf configures →

Reuse

Borrowing it

Nothing to install: this file belongs to eph5xx/surfskills.surf. 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/eph5xx/surfskills.surf/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/eph5xx/surfskills.surf

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 surfskills.surf CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/eph5xx/surfskills.surf/claude-md/github.svg)](https://agentmods.dev/instructions/eph5xx/surfskills.surf/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/eph5xx/surfskills.surf/claude-md"><img src="https://agentmods.dev/badge/instructions/eph5xx/surfskills.surf/claude-md/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 surfskills.surf CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/eph5xx/surfskills.surf/claude-md"><img src="https://agentmods.dev/badge/instructions/eph5xx/surfskills.surf/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,237 This file is loaded in full into every session.
When invoked 1,237 The same file — it is already loaded in full.
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.
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 $0.01237 $0.01237
Opus 5 $0.00619 $0.00619
Sonnet 5 $0.00247 $0.00247
Haiku 4.5 $0.00124 $0.00124

Measured 10d ago against content hash de1c257692fa, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

surfskills.surf CLAUDE.md 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.

CLAUDE.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What this is

surfskills.surf — a curated directory of open-source AI agent skills. Astro 5 site deployed to Cloudflare Workers. The catalog is a frozen build-time snapshot (no database at runtime); PostHog handles analytics.

Commands

npm run dev          # astro dev; .dev.vars secrets available via Cloudflare platformProxy
npm run build        # astro build → dist/
npm run preview      # build + wrangler dev — closest to production runtime
npx astro check      # typecheck (.astro + .ts); no npm script for it

There is no test suite and no linter configured.

Git workflow

core.hooksPath is set to .githooks, which blocks committing and pushing to main. Always work on a feature branch and PR into main.

Environment / secrets

Two distinct channels — don't mix them up:

  • .env (from .env.example): PUBLIC_* build-time values, inlined by Vite, read via import.meta.env. PostHog key/host.
  • .dev.vars (from .dev.vars.example): runtime secrets, read via Astro.locals.runtime.env (typed in src/env.d.ts). Production uses wrangler secret put + wrangler.jsonc vars.

Architecture

Rendering model: static by default, SSR opt-in

astro.config.mjs keeps output: 'static'; marketing/blog/legal pages and the whole catalog prerender. The catalog is a frozen build-time snapshot (content collections), so /discover, /s/[owner]/[repo], /s/[owner]/[repo]/[skill], sitemap.xml.ts, and llms.txt.ts are all prerender = true — the dynamic /s/** routes enumerate every path via getStaticPaths from the snapshot. The homepage (index.astro) is the lone remaining prerender = false route. URLs never have trailing slashes (trailingSlash: 'never' + build.format: 'file' — both are needed so static output serves /discover without a redirect, matching canonicals/sitemap).

Read the full file on GitHub · 68 lines

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. 10d ago First seen · 68 lines · 1,237 tokens per session scan A de1c257692fa

Subscribe to this mod's changes

surfskills.surf CLAUDE.md is an instructions file published in the GitHub repository eph5xx/surfskills.surf (2 stars, last pushed 28d ago), licensed MIT. It adds 1,237 tokens to every session, about $0.0062 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.

Related

Other instructions, from other repositories

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

spec-kit AGENTS.md

AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.

github/spec-kit · 7,104 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).

microsoft/vscode · 5,001 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,469 tokens