Minecraft – How to find all item files in Minecraft Bedrock Edition

The documentation that I have been able to find on this is incomplete and unclear. But it appears that for a resource pack on Minecraft Bedrock to show up, at least on Android, there must be a manifest.json file in resource_packs/<name> and in the folder under textures/painting there must be a single kz.png file of a special format. There is a "Vanilla" resource pack that can be downloaded, I followed the "downloading the example pack" link from the "Creating Add Ons" page.

For Java Edition, open the .minecraft folder (on Windows: %APPDATA%\.minecraft), then locate the versions folder, and the version you want your map for, within - for this example I'll use 1.16.2 - there should be a 1.16.2.json and 1.16.2.jar file inside (if .jar is missing, use the MC launcher to download and install the desired version, by creating a new installantion).

Make a copy of the [version].jar file somewhere, and change the file extension (rename the file) to 1.16.2.zip, then open in an archivizer program, like 7zip. Find data\minecraft\recipes\ folder and extract its contents. It contains the list of all craftable items, and you can use the json files in your program to generate the database to build the basis of the map - although in certain cases you will need some manual intervention, in case of special crafts like firework rockets, where a variety of ingredients produces different fireworks, and all the .json file says about the recipe is "type": "minecraft:crafting_special_firework_rocket"

See wiki for info on the format.

If you want sources of resources (like on the map), you may also check the loot_tables folder (next to recipes) - although it will require quite a bit of manual curating to exclude ultra-obscure sources (baby panda -> slime balls), treasure chests and all the way too obvious sources (cobblestone block -> cobblestone).