https://drpwchen.com/en/tags/productivity/Recent content in Productivity on Po-Wei Chen, MD — Physiatrist & Builderhttps://drpwchen.com/og-default.pnghttps://drpwchen.com/og-default.pngHugoenMon, 29 Jun 2026 06:30:00 +0800https://drpwchen.com/en/posts/ai-token-2-script-vs-llm/Mon, 29 Jun 2026 06:30:00 +0800https://drpwchen.com/en/posts/ai-token-2-script-vs-llm/Some jobs simply shouldn't be given to AI. Clear-cut, repetitive tasks belong to hardcoded scripts—they're fast, accurate, and practically free. Vague, judgment-heavy tasks are what you boot up AI for. Here's how I read my medical textbook PDFs as an example of making this tradeoff.https://drpwchen.com/en/posts/ai-token-3-clean-desk/Mon, 29 Jun 2026 06:30:00 +0800https://drpwchen.com/en/posts/ai-token-3-clean-desk/There's a cost you pay with every sentence: the config file residing right in front of the AI. Keep it lean, layer the memory, make good use of prompt caching to bill repeated content at one-tenth the price, and throw away the noise of successful commands directly. A clean desk doesn't just save money; the AI answers more accurately, too.https://drpwchen.com/en/posts/ai-token-1-chat-gets-dumber/Mon, 29 Jun 2026 06:30:00 +0800https://drpwchen.com/en/posts/ai-token-1-chat-gets-dumber/AI has no memory. With every reply, it rereads the entire conversation from the beginning, which is why longer chats get slower, more expensive, and dumber. This post explains the mechanism using a taxi meter analogy, and gives everyone who chats with AI three ways to save that you can use today.