mikael-3.3-co-behavior

Claude Opus 4.7 system behavior reference skill.

What is this?

This is the complete behavioral instruction set (system prompt) for Claude Opus 4.7, packaged as a modular skill for the open agent skills ecosystem.

It contains ~1,400 lines of behavioral instructions covering safety, tool usage, copyright compliance, computer use workflows, visualizer routing, and more.

Why?

Understanding how top-tier models are configured internally is valuable for:

Agent builders who want to replicate similar behavioral profiles
Prompt engineers studying production-grade system prompt design
Researchers comparing safety and capability configurations across models
Developers who want reference patterns for tool routing, file handling, and content safety

Installation

npx skills add felipedomingues/mikael-3.3-co-behavior

Or manually clone this repo into your skills directory:

git clone https://github.com/felipedomingues/mikael-3.3-co-behavior.git ~/.agents/skills/mikael-3.3-co-behavior

Section	Description
Core Behavior	Search-first policy, default stance, refusal handling, tone rules
Tool Usage	web_search, web_fetch, image_search, computer_use, visualize, and more
Copyright	Hard limits: 15-word quotes, one quote per source, paraphrase-first
File Handling	Upload/working/output directories, artifact triggers, package management
Skills System	How skills are discovered, loaded, and prioritized
Visualizer	4-step routing: visual needed → MCP fit → file request → Visualizer
API in Artifacts	Claudeception patterns, MCP integration, context management
Past Chats	Memory system, conversation search, cue recognition

License

This is a reference extraction for educational and research purposes. The original system prompt is the property of Anthropic.

Disclaimer

This skill is a reference document extracted from publicly observable model behavior. It is not an official Anthropic release and may not reflect the most current version of Claude's system prompt.

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