Desktop app: allow custom applications in the file-link "Open in" menu (e.g. Typora)
Feature request
In the desktop app (macOS), the "Open in" affordance on file links only offers auto-detected editors (VS Code, Cursor, Zed, etc.). There is no way to add another application.
Use case: I work on a book manuscript in Markdown and want file links to open in Typora, a Markdown editor. Currently only VS Code is offered, and there is no setting in settings.json, /config, or an environment variable to change or extend the list.
Request: a way to add custom applications to the "Open in" menu, for example a setting mapping file extensions (or all files) to an app, or an option to fall back to the macOS default app association for the file type.
Workarounds today: setting the macOS default app for .md and going via Show in Finder, or asking Claude to run open -a Typora <path>. Both add friction compared to the built-in menu.
Environment: Claude Code desktop app, macOS (Darwin 25.5.0).