The custom-items from sierrakomodo

How to add a custom item

Pick the most relevant directory for your item, and examine the template inside.
Create a .json file in the directory with the following naming scheme: ckey-itemtype.json (e.g. babydoll-necklace.json)
Fill out the provided template in the directory of your choice. See chart below for an explanation of the values.

Key	Expected Value	Function
ckey	string	Your ckey. This is not quite the same as your BYOND key, ask an admin or check the BYOND docs if you are unsure.
character_name	string	The name of the character the item should spawn with.
item_name	string	The name of your custom item ingame. For kits, the name of the kit product.
item_desc	string	The description of your custom item ingame. For kits, the descriptor for the kit product.
item_icon_state	string	The icon state for your custom item. For kits, the icon state of the kit product.
item_path	string	A fully specified BYOND object path (ie. /obj/item/foo/bar).
apply_to_target_type	string	A fully specified BYOND object path (ie. /obj/item/foo/bar) Only set this if you are reskinning an existing item.
req_access	array of strings	Access strings required for the character to have this item on spawn.
req_titles	array of strings	Titles and alt titles that are allowed to spawn with this item.
additional_data	array of values	An associative list of other values. See each the relevant template for your item for more information on this field.

Note - All icons should be added to the END of the relevant file. This helps organisation.

Add an icon to represent the item when held in the hand to icons/obj/custom_items.dmi (or whatever your codebase defines as CUSTOM_ITEM_OBJ). The icon state should be the same as the value set for item_icon in the config.
Add icons to icons/mob/custom_items.dmi (or, again, whatever your codebase defines as CUSTOM_ITEM_MOB) for inhands. You need a left and right icon. The icon state should be the item_icon followed by _l for left and _r for right.
If the item is wearable, add an icon to icons/mob/custom_items.dmi for the on-mob icon.
Read the notes section in the template your're using carefully, and set up additional_data as directed. If your template has no notes, skip this step.
You're done. Compile, test (see final section below), and discover you misspelled a state, etc.

ckey-robotname

Create icon and eye states for each of the following modules: Standard, Engineering, Construction, Janitor, Surgeon, Crisis, Miner, Security, Service, Clerical, Research
Create maintenance panel states for: opened, cell removed, and wires cut.
Name your main states in the following format: yourckey-ModuleName
Name your eyes states in the following format: eyes-yourckey-ModuleName
The open panel should be named yourkey-openpanel +c; the panel with no cell should be named yourckey-openpanel-c; the wire panel should be named yourckey-openpanel +w

ckey:ai_name

ckey:ai_name:icon_state

ckey should be your key with no spaces or underscores, all in lowercase.
ai_name is the exact name you will use for the AI the display belongs to.
icon_state is the name of your AI icon states without the "-ai" or "-ai-crashed" suffixes. Defaults to the ckey value if unset.

Multiple entries per player is possible, as long as the icon_state value is set and unique, i.e.:

ckey:ai_name:custom_icon_1
ckey:ai_name:custom_icon_2

Add the first or both of the following icon states to icons/custom_synthetic.dmi named {icon_state}-ai and {icon_state}-ai-crash (the ai-crash icon state is optional), replacing {icon_state} with the icon_state value you've selected.

ckey_example:ExampleAIName

With the example above the resulting icon state names would be "ckey_example-ai" (required) and "ckey_example-ai-crash" (optional).

ckey_example:ExampleAIName:example_icon_state

With the example above the resulting icon state names would be "example_icon_state-ai" (required) and "example_icon_state-ai-crash" (optional).

Create a .json file as directed above, and place it in the config/custom_items directory of your local copy of your main repository (eg. Baystation12)
Change ckey in the definition to YOUR CKEY. Change name to a character name you will be using for testing, or just use their name.
Add the relevant icons to the relevant files in your main repo folder.
Compile and run the game. Ready up, taking note of any job or access restrictions, and start the round. If you did it all correctly, you will have spawned the custom item. If not, it should hopefully print an error to world.log.
Once you're done testing, make sure you revert any changes made in your main repo folder. Do not push custom items related things to the main repo!