Lessons
From the last year
sk-ant-oat... is a Claude Code OAuth token, not an ANTHROPIC_API_KEY
anthropic claude-code oh-my-pi authentication api-key 427 tokens
sk-ant-oat... is a Claude Code OAuth token, not an ANTHROPIC_API_KEY
anthropic claude-code authentication api-key oauth 340 tokens
Codex has no project-scoped MCP config, and
codex exec ignores OPENAI_API_KEY until you log incodex openai mcp cli authentication 380 tokens