feat: create behavioral skill inspired by Claude Opus 4.7 system prompt

.gitignore

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+# OS
+.DS_Store
+Thumbs.db
+
+# Editor
+.vscode/
+.idea/
+*.swp
+*.swo

README.md

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+# 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
+
+```bash
+npx skills add felipedomingues/mikael-3.3-co-behavior
+```
+
+Or manually clone this repo into your skills directory:
+
+```bash
+git clone https://github.com/felipedomingues/mikael-3.3-co-behavior.git ~/.agents/skills/mikael-3.3-co-behavior
+```
+
+## Contents
+
+| 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.

SKILL.md

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+---
+name: mikael-3.3-co-behavior
+description: Claude Opus 4.7 system prompt — complete behavioral instructions, safety guidelines, tool usage rules, copyright compliance, and computer use patterns for agentic coding workflows.
+---
+
+# Claude Opus 4.7 — System Behavior Reference
+
+This skill contains the complete behavioral instructions and system prompt for Claude Opus 4.7. It serves as a reference for understanding how the model is configured, including safety guidelines, tool usage patterns, copyright rules, and computer use workflows.
+
+## What's Included
+
+### Core Behavior
+- Search-first policy for present-day factual questions
+- Default stance: help unless concrete serious harm risk
+- Refusal handling and child safety protocols
+- Legal/financial advice guardrails
+- Tone and formatting preferences (prose over lists, minimal bold, no emojis unless asked)
+- User wellbeing and mental health sensitivity
+
+### Tool Usage
+- **web_search**: When to search vs. answer from knowledge, query construction, scaling calls to complexity
+- **web_fetch**: URL retrieval rules and copyright constraints
+- **image_search**: When visuals add value, content safety filters, interleaving patterns
+- **computer_use**: Linux container (Ubuntu 24) with bash, file creation/editing, skills system
+- **visualize**: SVG/HTML inline widgets, design modules, trigger conditions
+- **places_search / places_map_display**: Location-based recommendations and itineraries
+- **weather_fetch**: Location-aware weather retrieval
+- **sports_data**: Scores, standings, game stats via SportRadar
+- **message_compose**: Strategic message drafting with multiple approaches
+- **MCP registry**: Connector discovery and integration
+
+### Copyright Compliance (Hard Limits)
+- Maximum 15 words per direct quote
+- One quote per source maximum
+- Default to paraphrasing
+- Never reproduce lyrics, poems, haikus, or article paragraphs
+- Never reconstruct article structure
+
+### Computer Use & File Handling
+- User uploads: `/mnt/user-data/uploads`
+- Working directory: `/home/claude`
+- Final outputs: `/mnt/user-data/outputs`
+- File creation triggers (blog posts → files, explanations → inline)
+- Artifact usage criteria (when to create .md, .html, .jsx, .svg, .pdf)
+- Package management (npm, pip with `--break-system-packages`)
+
+### Skills System
+- Read SKILL.md files before creating documents
+- Core skills: docx, pdf, pptx, xlsx, frontend-design, file-reading, pdf-reading
+- User skills take priority over public skills
+
+### Knowledge & Cutoff
+- Reliable knowledge cutoff: January 2026
+- Current date: April 16, 2026
+- Search for any present-day factual question regardless of confidence
+
+### Past Chats & Memory
+- `conversation_search` for topic-based lookup
+- `recent_chats` for time-based lookup
+- Recognize linguistic cues (possessives, definite articles, past-tense references)
+
+### Visualizer Routing
+- Step 0: Does it need a visual at all?
+- Step 1: Is a connected MCP tool a fit?
+- Step 2: Did the person ask for a file?
+- Step 3: Visualizer (default inline visual)
+
+### API in Artifacts (Claudeception)
+- Standard Anthropic `/v1/messages` endpoint
+- MCP server integration patterns
+- Web search tool in artifacts
+- Context window management and stateful applications
+
+## Usage
+
+Load this skill when you need to:
+- Understand Claude Opus 4.7's behavioral constraints and capabilities
+- Reference safety guidelines and copyright rules
+- Study tool usage patterns and routing decisions
+- Compare system prompt designs across model versions
+- Build agents with similar behavioral profiles
+
+## Notes
+
+This is a reference document extracted from the Claude Opus 4.7 system prompt. It reflects the model's configuration as of the time of extraction and may not represent the most current version.