question: DIFFNAV_EDITOR is not running in Windows

[AlbertoVPersonal]

Description

When I'm checking a diff, I cannot open the editor to see the selected file.

Steps to reproduce

1. Set DIFFNAV_EDITOR environment variable with value zed
2. Open a diff with "diffnav" as pager
3. Select a file
4. Click o

Expected behaviour

The file should be opened using the defined editor.

Environment

• Windows 11 Pro x64
• Command line: DOS or Powershell
• diffnav version v0.10.0

Additional context

echo %DIFFNAV_EDITOR%

# response
zed

I use diffnav from gh dash but if I do it manually the result is the same.

gh pr diff https://github.com/<my_organization>/icon/pull/664 | diffnav

It does not work under these test conditions:

• Using PowerShell.
• Setting the editor to code.
• Changing the user variable to a system variable.

[Booyaka101]

diffnav reads $EDITOR for the o action (it's in the README keybindings: "Open file in $EDITOR"). DIFFNAV_EDITOR isn't a variable diffnav looks at, so with it unset nothing happens — setting EDITOR=zed should do it.

One Windows gotcha I confirmed while looking into this: if the editor isn't on your PATH, the launch fails quietly with no message, so it looks like nothing happened. So either make sure zed is on PATH, or point EDITOR at the full path to zed.exe.

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Disclosure per AI_POLICY: investigated with Claude Code; I verified the $EDITOR behaviour and the silent-failure-when-not-on-PATH case on a Windows machine myself before posting.