# 274. Boundless Sky

> The cover was shot one evening in Shenzhen, just after the rain, when the sky was especially clear. The building is called Haikuo Tiankong Yaju, and you could even see Baidu in the distance.

- Issue: 274
- Published: 2026/07/20
- HTML: https://weekly.tw93.fun/en/posts/274
- JSON: https://weekly.tw93.fun/api/en/posts/274.json
- Chinese original: https://weekly.tw93.fun/posts/274.md

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<img src="https://cdn.tw93.fun/uPic/27453.jpg" width="800" />

<small>The cover was shot one evening in Shenzhen, just after the rain, when the sky was especially clear. The building is called Haikuo Tiankong Yaju, and you could even see Baidu in the distance.</small>

> **Recording down-to-earth trending tech I see every week, filtered and published here. Follow this weekly newsletter to get update notifications**

## Trending Tools

**wong2 made a handy tracker for Codex usage limit resets**
<https://codex-resets.com/>
Pretty funny. Codex usage limits seem to reset whenever @thsottiaux announces one on X, almost like he has a button in his hand. There is no fixed schedule and no changelog, so this tool watches his posts and lets you know when a reset happens. Haha. Lately I haven't been able to use up my Codex allowance at all.
<img src="https://cdn.tw93.fun/uPic/9zFep508.png" width="800" />

**Trees: a beautiful file tree rendering library**
<https://trees.software/>
The file tree rendering looks really good. I like simple, beautiful things like this. If you're building a file tree for an editor sidebar, this is worth studying.
<img src="https://cdn.tw93.fun/uPic/lEQhIy33.png" width="800" />

**Bark: an open-source tool for pushing messages to your own iPhone**
<https://github.com/Finb/Bark>
An open-source and free notification app built on APNs, so it doesn't add extra battery drain. It also supports advanced iOS notification features including grouping, custom icons and sounds, time-sensitive notifications, critical alerts, and more.
<img src="https://cdn.tw93.fun/uPic/QMnaYL10.png" width="800" />

**WhatCable: find out what your USB-C cable can actually do**
<https://www.whatcable.uk/>
This tool clearly tells you what a USB-C cable can do, including cable speed, charging limits, and connected devices. You can name each cable and have it track real-world performance over time, making it easier to see why a cable charges slowly or can't drive a display. Nice idea, though fairly niche.
<img src="https://cdn.tw93.fun/uPic/cQ7ITN19.png" width="800" />

## Just Looking Around

**Phistory: see what changed in the system prompts of popular AI coding tools**
<https://phistory.cc/?agent=claude-code&from=2.1.141&to=2.1.215>
Great for anyone curious about how AI coding tools evolve. The site uses diffs to make each change easy to see.
<img src="https://cdn.tw93.fun/uPic/pgmjjD23.png" width="800" />

**A site collecting beautifully designed Mac apps**
<https://macapp.supply/>
The site itself is nicely designed, and the Mac apps it features all feel polished. There's a lot here for me to learn from.
<img src="https://cdn.tw93.fun/uPic/5SlEcC34.png" width="800" />

**How Anthropic uses Claude Code for large-scale code migrations**
<https://claude.com/blog/ai-code-migration>
An official Claude blog post well worth reading. It covers Bun's million-line migration from Zig to Rust and offers some useful lessons for large companies moving old, sprawling repositories.
<img src="https://cdn.tw93.fun/uPic/QZiACS37.png" width="800" />