AI coding agents make developer-tool customization practical, strengthening the case that devtools should be open source

The article argues that software engineers historically rarely wrote or maintained tools just for themselves because upkeep was costly. Now, AI agents can modify source code, preserve the rationale in version control, and regularly rebase local changes, making personalized devtools far more practical.

As AI lowers the cost of maintaining private forks, developers may increasingly expect tools to be inspectable, modifiable, and self-hostable. This creates pressure on devtool vendors: open source may become a competitive requirement rather than a philosophical preference.