Build bespoke personal apps with coding agents
A developer uses agents to build their own browser, email client, calendar, finance app, git client and file manager, noting week-long testing is needed to catch subtle regressions. ·
Done with a custom-built or unnamed agent
- What they did
- The developer uses coding agents to build personal replacements for everyday software: a browser, email client, calendar, finance app, git client and file manager, among others. The apps are shaped to their own taste and run alongside the old apps. Each agent task is accepted only after about a week of real use, and they plan to add vision-based test agents for user flows.
- How it went
- The apps improve daily but aren't stable enough for edge cases at scale. Agents are weak at interaction regression and consistent feel, and the state layer between database and UI remains unsolved; TanStack DB looks most promising.
- Worth knowing
- Wait about a week of real use before accepting an agent change, since pushing faster let subtle regressions degrade the app quickly.
Try it yourself with Claude Code
I want to build my own [type of app, e.g. calendar, email client, or file manager] that fits how I work. Start by asking me about the 3 to 5 features I use most, then build a simple working version in this folder and tell me how to run it. Keep a list of known rough edges and a short checklist of things I should test over the next week, so we can fix regressions as I use it.
Want help getting this working? Join the Vibe Coding Academy ↗ Run by Alex Finn, who also runs this site.
Source: HN · Nov 14, 2026
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