Integrate the Anthropic Messages API with system prompts, tool calls, streaming, and client error handling.
Install
npx skills add alivirgo/Major-AI-Skills --skill anthropic-apinpx skills add alivirgo/Major-AI-Skills --skill anthropic-api -a claude-code -gnpx skills add alivirgo/Major-AI-Skills --skill anthropic-api -a codex -ggemini skills install https://github.com/alivirgo/Major-AI-Skills.git --path skills/anthropic-apigh skill install alivirgo/Major-AI-Skills anthropic-apigit clone --depth 1 https://github.com/alivirgo/Major-AI-Skills /tmp/alivirgo__Major-AI-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/alivirgo__Major-AI-Skills/skills/anthropic-api ~/.claude/skills/anthropic-api # Claude Code
cp -R /tmp/alivirgo__Major-AI-Skills/skills/anthropic-api ~/.agents/skills/anthropic-api # Codex, Cursor, Gemini CLI, Copilot, OpenCode