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 agentmods add instructions/paulduvall/ai-development-patterns/claude-mdgit clone --depth 1 https://github.com/PaulDuvall/ai-development-patternsWhat 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 | $0.01361 | $0.01361 |
| Opus 5 | $0.00681 | $0.00681 |
| Sonnet 5 | $0.00272 | $0.00272 |
| Haiku 4.5 | $0.00136 | $0.00136 |
Grade A, and why
ai-development-patterns 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 112 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 AI Development Patterns repository - a comprehensive collection of patterns for building software with AI assistance. The patterns are organized by implementation maturity (Beginner/Intermediate/Advanced) and development lifecycle phases (Foundation → Development → Operations).
Repository Structure
├── README.md # Main pattern documentation
├── pattern-spec.md # Pattern creation specification and formatting rules
├── PATTERN_MIGRATION_GUIDE.md # Naming/anchor migration reference (historical + mapping)
├── index.html # GitHub Pages landing page
├── docs/ # Additional documentation
├── examples/ # Working implementations of stable patterns
├── experiments/ # Experimental patterns + examples
├── scripts/ # Repo automation scripts (validation, updates)
├── tests/ # Pytest-based validation suite
├── verification/ # Machine-verified pattern adoption evidence (see verification/README.md)
└── .github/ # GitHub Actions workflows
Key Architectural Principles
Pattern Architecture
- Three-tier organization: Foundation → Development → Operations patterns
- Dependency-driven: Patterns have explicit dependencies shown in the reference table
- Maturity-based progression: Beginner patterns enable Intermediate, which enable Advanced
- Anti-pattern inclusion: Every pattern includes what NOT to do with specific examples
Pattern Reference System
- Hyperlinked navigation: Every pattern reference must link to its section using
#pattern-name-in-lowercase-with-hyphens - Comprehensive reference table: See "Complete Pattern Reference" in
README.md - Related patterns: Each pattern explicitly lists dependencies and related patterns
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.
- 3d ago First seen · 112 lines · 1,361 tokens per session scan A fe9867f87d9a
ai-development-patterns CLAUDE.md is an instructions file published in the GitHub repository PaulDuvall/ai-development-patterns (645 stars, last pushed 4d ago), licensed MIT. It adds 1,361 tokens to every session, about $0.0068 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 2026-08-30.
Other instructions, from other repositories
awesome-claude AGENTS.md
AGENTS.md instructions for JSONbored/awesome-claude, covering heyclaude agent instructions, project intent, source of truth, contribution and content policy and safety and privacy metadata.
claude-code CLAUDE.md
Instructions for PaulDuvall/claude-code, covering claude.md, project overview, core philosophy, key principles and repository structure.
awesome-claude CLAUDE.md
Claude Code instructions for JSONbored/awesome-claude, a project described as: HeyClaude is a curated registry and distribution surface for Claude and AI-workflow assets: agents, MCP servers, skills, commands, hooks, rules, guides, tools, jobs, Raycast feeds, static data exports, and an npm MCP package.
video-clip-agent CLAUDE.md
Instructions for neopen/video-clip-agent, covering penclip — 视频混剪智能体, 当前状态, 分层架构（依赖方向：外层 → 内层，内层禁止反向依赖）, bridge 层（向后兼容转发，勿在此改逻辑） and 关键入口.
FrameCode-VibeWork AGENTS.md
Instructions for Sistema2D/FrameCode-VibeWork, covering agents.md, instruction order, reading-trigger rule, regression rule and when a plan is required.
task-orchestrator CLAUDE.md
Instructions for jpicklyk/task-orchestrator, covering project: mcp task orchestrator, build commands, docker (most common), architecture and modes of operation.