https://tj-zhang.com/https://tj-zhang.com/blog/https://tj-zhang.com/tags/https://tj-zhang.com/blog/code-mode-mcp-without-context-bloat/https://tj-zhang.com/blog/describing-tools-for-ai-agents/https://tj-zhang.com/blog/keeping-derived-results-current/https://tj-zhang.com/blog/react-for-systems-engineers/