---
title: "Build a small viewer tool in hours · Lenexa Learn"
description: "Tired of previewing files by hand, one developer asked Claude Code for help and had a working viewer in two hours. They kept adding to it until it showed…"
url: https://www.lenexa.ai/learn/use-cases/build-a-small-viewer-tool-in-hours/
site: "Lenexa Learn"
---

Software & DevOps

# Build a small viewer tool in hours

Tired of previewing files by hand, one developer asked Claude Code for help and had a working viewer in two hours. They kept adding to it until it showed diffs of an agent's edits.

## Steps

1. Describe the tool.
2. Start with the bare minimum.
3. Add one feature at a time.

## Prompt you can copy

```
Build a simple viewer that shows [file type] and highlights what changed since last version.
```

## Tools

- Claude Code

For Developers. Added October 12, 2026.

## Source

[hn](https://news.ycombinator.com/item?id=49563466) · September 2026

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