I'll Just Build It Myself; Playing with Crafting

 Source Player Core pg. 236 

Crafting

You can use this skill to create and repair items.

Crafting Actions

Action	Source	Proficiency
Recall Knowlege	Player Core	Untrained

Consumables and Ammunition

You can Craft items with the consumable trait in batches, making up to four of the same item at once with a single check. This requires you to include the raw materials for all the items in the batch at the start, and you must complete the batch all at once. You also Craft non-magical ammunition in batches, using the quantity listed in the Ranged Weapons table.

Basic Crafting Feats

Feat	Source	Prerequisites	Traits	Level
Pharmaceutical Crafting	Starfinder 2e; Playtest Rulebook	Trained in Stealth		1st