Heavily reduced encounter rate + save anywhere edits.
data.zip, small edits to significantly reduce encounter rate. Also lets you dash on the world map, because reasons. Extracted files go into "www/data". If you did it right, you'll be asked to overwrite files. I might've missed a couple maps, if you suddenly find yourself being assaulted nonstop on a map. Backup old data files in case you want to go back to being assaulted every 1-2 steps.
The next one is a VERY dirty edit to allow saving anywhere, and it works, but with a few caveats. Before you install this file, make as many free save slots as you think you'll need. Also, it lets you overwrite saves at the title screen for the game. For obvious reasons, do not overwrite files at the title screen. Once you replace your file with this one, you can no longer make new saves, only overwrite current ones--- but you will be able to save everywhere. BACKUP THE OLD FILE in case you want to make new files. The save edit is wonky, but I'm unwilling to really put in more effort, as what I did works fine for my needs. Maybe someone will make something more foolproof later.
Please read all of that before using the save anywhere edit. I can not stress enough how jank my edit is, and how much you should actually follow the above instructions.
Unzip "Yep_SaveCore" into "Primitive Hearts\www\js\plugins" and replace the file after backing up the original.
Edit: I made these a month ago before 1.02 existed. I do not know if my changes overwrite the 1.02 changes. I'd avoid using my edits with 1.02 just in case.