Claude built a native Mac audio capture app in 4 minutes
Apple's built-in capture can't record the Mac's system audio, OBS felt clunky and Kap seemed untrustworthy. So they asked Claude to build a native app that did exactly what they needed. It took 4 minutes.
Done withClaudeSpotted· by HN user greggman65· Oct 20, 2026
Result Also built a Japanese dictionary site in under 2 hours
“4 minutes later I had a native app that did exactly what I needed”
Spotted: found in the wild. Details are as reported by the source above and have not been independently verified.
What they did
They needed to capture audio from their Mac’s system, something Apple’s built-in capture doesn’t support. OBS was recommended but has a difficult UX, and Kap was recommended but seemed untrustworthy, so instead they asked Claude to build a native app that did exactly what they needed.
How it went
4 minutes later they had a native app, g-cap, that worked as needed. They had a similar experience earlier, asking Claude for a Japanese/English dictionary like jisho.org, sharded so it could be served from GitHub Pages with no database. It was done and useful less than 2 hours later.
Try it yourself with Claude
When you want a small desktop tool that off-the-shelf apps don't handle well, like [capturing system audio], describe exactly what you need to [Claude, Codex, or another coding agent] and ask it to build a small native app for it, rather than hunting for an existing tool with the right feature.
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.
An unwieldy pile of Claude chats sent the writer looking for an organizer extension, but the only one they found was Chrome-only. Claude built one from scratch for Firefox instead.
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It built the game from his description and kept adding his ideas. Then the file got too big, edits broke in a loop, and the parent had to step in: split the code into several files.
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