curl -sS https://api.anthropic.com/v1/messages \
        -H "authorization: Bearer $(security find-generic-password -s 'Claude Code-credentials' -w | jq -r .claudeAiOauth.accessToken)" \
        -H "anthropic-version: 2023-06-01" \
        -H "anthropic-beta: oauth-2025-04-20" \
        -H "content-type: application/json" \
        -d '{
          "model":"claude-opus-5-5",
          "max_tokens":64,
          "system":"You are Claude Code, Anthropic'\''s official CLI for Claude.",
          "messages":[{"role":"user","content":"Hello, world!"}]
        }'