Hey there.
Sadly the wiki(as the intended primary documentation of code examples/how-to-s) has been quite unmaintained for a long time. Some examples are only available on the horrible SpigotMC's page sourcecode, the Spigot forums, or Discord.
Therefore, I set up the wiki's source to be auto-deployed from the master branch of this repository(https://github.com/tr7zw/Item-NBT-API/tree/master/wiki). From now on, code examples, pitfalls, guides, and documentation can be supplied to the wiki with a normal pull request.
For Hacktoberfest, feel free to create a piece of example code, clean up the wording, or update the documentation of the wiki. Then provide it as a valid pull request for Hacktoberfest.

Some examples that need updated code examples/guides:

• Creating player heads with textures in 1.8-1.19
• Keeping custom data from an item -> placed BlockEntity -> back to item
• Adding custom logic to items(on right-click/drop/pickup/other events)
• Adding custom data to 1.8-1.13 mobs via some item slot
• Adding custom data to 1.14+ Entities and BlockEntities
• Copy over data from one item to another
• Keeping track of custom Entities without causing lag
• Keeping track of custom player properties without causing lag
• Storing an inventory in an item/non inventory block entity
• Shading on Gradle
• Links to the places where the API can be downloaded(Modrinth/Bukkit)
• Better link to the Javadoc(https://tr7zw.github.io/Item-NBT-API/v2-api/ https://tr7zw.github.io/Item-NBT-API/v2-plugin/)
• Documentation of plugins/servers? using the NBTAPI(instead of SpigotMCs description)

HI @tr7zw can you assign this one to me please?

The issue is open in general since I don't expect anyone to do ALL of that. For Hacktoberfest afaik only the PRs are important(tagged correctly).

HI @tr7zw can you assign this one to me please?