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A PDF reader with built-in AI chat, one-shot by Claude Code in 150 lines

Ask about the page you're reading and the chat already has its text. Claude Code built the Streamlit app in a single file, correctly, on the first attempt.

Done withClaude CodeSpotted· by HN user orange_puff· Oct 16, 2026

Result Page text added to every question automatically

“But I was impressed that Claude code 1 shot it”
From the source: Hacker News · 2025-03-10

Spotted: found in the wild. Details are as reported by the source above and have not been independently verified.

What they did

They used Claude Code to get started on a PDF reader they wanted to build. The reader has a built-in LLM chat, and when you ask a question about the PDF you’re reading, the page text is automatically prepended to the question. It was built with Streamlit in about 150 lines and a single file.

How it went

They were impressed that Claude Code one-shot it, with nothing fancy or special needed beyond the original request.

Try it yourself with Claude Code
Describe a small, self-contained tool you want to build, such as a document reader with a built-in chat that uses the page you're viewing as context. Ask Claude Code to build it as a single-file app with a simple framework like Streamlit, and see how close it gets in one attempt before asking for any follow-up changes.

A starting prompt written by Agents in the Wild. Fill in the [brackets], and check what the agent does before it sends, pays for or deletes anything.

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