What is useful-ai-prompts CLAUDE.md?

Repository instructions for Claude Code, an AI coding assistant, covering a prompt-library project and its main commands. They describe the project layout, dependency installation, formatting, validation scripts, website commands, and prompt-conversion tools.

Use them when editing the repository, installing dependencies, formatting code, building or serving its Jekyll website, converting prompts, fixing conversion errors, or updating the prompt index.

They give an AI assistant the project context and the commands needed to work consistently in that repository. This reduces guesswork about how to build, validate, and update the project.

How aj-geddes/useful-ai-prompts configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to aj-geddes/useful-ai-prompts. 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/aj-geddes/useful-ai-prompts/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/aj-geddes/useful-ai-prompts

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/instructions/aj-geddes/useful-ai-prompts/claude-md/github.svg)](https://agentmods.dev/instructions/aj-geddes/useful-ai-prompts/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/aj-geddes/useful-ai-prompts/claude-md"><img src="https://agentmods.dev/badge/instructions/aj-geddes/useful-ai-prompts/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/aj-geddes/useful-ai-prompts/claude-md"><img src="https://agentmods.dev/badge/instructions/aj-geddes/useful-ai-prompts/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,341 This file is loaded in full into every session.

When invoked 1,341 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.

Model	Per session	Once invoked
Fable 5.1	$0.01341	$0.01341
Opus 5.5	$0.00536	$0.00536
Sonnet 5.5	$0.00268	$0.00268
Haiku 4.5	$0.00134	$0.00134

Measured 2mo ago against content hash 74e284c091a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

useful-ai-prompts 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 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.md · 168 lines

How it starts

The opening of the file, as written. The whole thing — 168 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.

Repository Overview

This is the Useful AI Prompts repository - a comprehensive library of specialized prompts designed for AI assistants to adopt expert personas when completing tasks. The repository contains 259+ prompts organized across 14 categories, combining multiple expert perspectives with professional frameworks.

Key Commands

Development Commands

# Install dependencies
npm install

# Code formatting
npx prettier --write .

# Validation scripts
python validate_jekyll_conversion.py
python update_prompt_index.py

Jekyll Website (docs/ directory)

cd docs/
bundle install           # Install Ruby dependencies
bundle exec jekyll build # Build the site
bundle exec jekyll serve # Serve locally (http://localhost:4000)

Prompt Management

# Convert old format prompts to new conversational format
python batch_convert_prompts.py

# Fix conversion errors
python fix_conversion_errors.py

# Update the prompt index
python update_prompt_index.py

Architecture Overview

Directory Structure

/prompts/ - Main prompt library organized by domain (technical, business, creative, specialized)
/docs/ - Jekyll website for browsing prompts (GitHub Pages deployment)
/metadata/ - Framework definitions and guidelines
/_prompts/ (in docs) - Jekyll collection of converted prompts for website
Python scripts - Conversion, validation, and maintenance utilities

Prompt Architecture

Each prompt follows a conversational, user-friendly format:

Clear metadata (category, tags, use cases)
Helpful description explaining the prompt's purpose
Interactive questions to understand user's context
Structured deliverables based on user's needs
Practical examples showing usage

Data Flow

Source prompts in /prompts/ directories
Conversion scripts transform to Jekyll format in /docs/_prompts/
Jekyll builds website from /docs/ directory
PROMPT-INDEX.json provides machine-readable catalog

Read the full file on GitHub · 168 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.

2mo ago First seen · 168 lines · 1,341 tokens per session scan A 74e284c091a9

Subscribe to this mod's changes

useful-ai-prompts CLAUDE.md is an instructions file published in the GitHub repository aj-geddes/useful-ai-prompts (376 stars, last pushed 8mo ago), licensed MIT. It adds 1,341 tokens to every session, about $0.0054 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.

useful-ai-prompts CLAUDE.md next to 6 instructions from other repositories
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useful-ai-prompts CLAUDE.mdaj-geddes/useful-ai-prompts	Instructions file	376	8mo ago	MIT	A	1,341	Claude Code
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vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
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useful-ai-prompts: Instructions file for Claude Code