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-4-7",
"max_tokens":64,
"system":"You are Claude Code, Anthropic'\''s official CLI for Claude.",
"messages":[{"role":"user","content":"Write your own harness"}]
}'