For Feather Client, you can use the Feather Client Mod Menu to browse and manage installed modifications. Safety Warning

In the Minecraft community, "Kokscraft" is often linked to specialized client settings or "configs" designed to optimize performance or provide competitive advantages on various servers. These files typically contain:

Are you trying to this configuration for a specific Minecraft client, or Kokscraft Minecraft Settings Guide | PDF - Scribd

Many modern clients allow you to or "Import" directly from their in-game settings menu.