Merging options.txt

[OpenBagTwo]

GIVEN Alex uses Minecraft across multiple machines (and multiple Minecraft versions on the same machine)

WHEN she changes a setting in-game that's reflected in options.txt (or possibly even iris.properties)

THEN, depending on the option changed (see notes), that change is propagated across a related set of instances without completely overwriting every instance's options.txt

SO that she can manage common settings globally without giving up the ability to manage settings on a per-instance or per-computer basis

Notes

Examples would be:

• setting keybinds globally
• resourcepacks on a per-instance basis
• graphics settings (including / especially render distance) on a per-machine basis

As of now, I'm really not sure how this would happen without some daemon watching over the files and looking for changes.