Fix "Failed to start new session" for users with a fetch installed

[Ahmad-A0]

The way that the default_program used for execution is found and set to the config, was by sourcing .bashrc or .zshrc then running which claude. Only redirecting stderr to /dev/null like this.

shellCmd = "source ~/.zshrc 2>/dev/null || true; which claude"
shellCmd = "source ~/.bashrc 2>/dev/null || true; which claude"

For users that have a fetch script installed, or any configuration where something is written to stdout during initialisation the whole output would be set as the default_program, causing the "Failed to start new session ..." error for new users.

{
  "default_program": "\u001b[36m                         \u001b[33maa0\u001b[31m@\u001b[32maa7\u001b[0m ~\u001b[0m\n    \u001b[36m       /\\                \u001b[36m󰣇  \u001b[34mSystem\u001b[0m        Arch Linux\n    \u001b[36m      /  \\               \u001b[36m  \u001b[34mKernel\u001b[0m        Linux 6.14.9-zen1-1-zen (x86_64)\n    \u001b[36m     /\\   \\              \u001b[36m  \u001b[34mShell\u001b[0m         zsh\n    \u001b[36m    /      \\             \u001b[36m  \u001b[34mUptime\u001b[0m        1 day, 8 hours, 26 minutes\n    \u001b[36m   /   ,,   \\            \u001b[36m  \u001b[34mDesktop\u001b[0m       Hyprland (Wayland)\n    \u001b[36m  /   |  |  -\\           \u001b[36m  \u001b[34mMemory\u001b[0m        5.26 GiB / 7.52 GiB (\u001b[36m70%\u001b[0m)\n    \u001b[36m /_-''    ''-_\\          \u001b[36m󱥎  \u001b[34mStorage (/)\u001b[0m   150.73 GiB / 217.29 GiB (\u001b[36m69%\u001b[0m)\n    \u001b[36m                         \u001b[36m  \u001b[34mColors\u001b[0m        \u001b[34m  \u001b[36m  \u001b[32m  \u001b[33m  \u001b[31m  \u001b[35m  \u001b[0m\n/usr/bin/claude",
  "auto_yes": false,
  "daemon_poll_interval": 1000,
  "branch_prefix": "aa0/"
}

The fix redirects both stdout and stderr to /dev/null to stop this from happening.

I believe this should fix #132 #96 and #115.

[github-actions]

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[Ahmad-A0]

I have read the CLA Document and I hereby sign the CLA

[mufeez-amjad]

Thanks for putting up a fix! 🙏