Unity Package Management (Pipeline commands first, C# script as the fallback) Add, remove, upgrade, and discover UPM (Unity Package Manager) packages with the commands of the project's Pipeline package, run through . Only when no Editor can answer those commands, fall back to driven headless from a script (see Fallback). Do not hand-edit : the Package Manager resolves dependencies and compatible versions correctly, whereas manual edits routinely break resolution. This complements the skill (editor install, project creation, build/test), which documents , and . Use the package commands first T…