List of task types

Class name	Target type	Description	Valid until
TaskAttack1	Creep|Structure	melee- and ranged-attacks a target	target is destroyed or creep has no combat parts
TaskBuild	ConstructionSite	builds a construction site	creep is out of energy or construction is finished
TaskClaim	StructureController	claims an unowned controller	creep has no claim parts or controller is claimed
TaskDismantle	Structure	dismantles a structure	creep has no work parts or target is destroyed
TaskDrop	null2	drops energy at a position	creep is out of energy
TaskFortify	Wall|Rampart	fortifies (repairs) a wall or rampart	creep is out of energy or maxHits reached
TaskGetBoosted3	StructureLab	obtains a boost from a lab with a given mineralType	creep has specified number of boosts
TaskGetRenewed3	StructureSpawn	travels to a spawn and tells it to renew the creep	90% max ticksTolive reached
TaskGoTo	null2	travel to a specified position	creep is within 1 range of position and not on an exit tile
TaskGoToRoom	null2	travel to a specified room	creep is in the room and not on an exit tile
TaskHarvest	Source	harvests energy from a source	creep carry is full or source is depleted
TaskHeal1	Creep	heals a creep if in range 1, ranged-heals if in range 3	creep has no heal bodyparts or target health is full
TaskMeleeAttack1	Creep|Structure	melee-attacks a creep or structure	creep has no attack bodyparts or target is destroyed
TaskPickup	Resource	picks up a resource	creep carry is full or resource amount is 0
TaskRangedAttack1	Creep|Structure	ranged-attacks a creep or structure	creep has no ranged-attack bodyparts or target is destroyed
TaskRepair	Structure	repairs a structure	creep is out of energy or maxHits reached
TaskReserve	StructureController	reserves a controller	creep has no claim bodyparts or controller is owned or controller is reserved to max ticks
TaskSignController	StructureController	signs a controller	controller signature matches task.data.signature
TaskTransfer	Valid structures or Creep	transfers resources (default: energy) to a target	creep has insufficient resources or target is full
TaskTransferAll	Valid structures or Creep	transfers all resources to a target	creep has no resources or target is full
TaskUpgrade	StructureController	upgrades a controller	creep is out of energy or controller.my is false
TaskWithdraw	Valid structures	withdraws resources (default: energy) from a target	creep carry is full or target has insufficient amount of resource
TaskWithdrawAll	Valid structures	withdraws all resources from a target	creep carry is full or target has no remaining resources

¹Tasks are not optimized for executing multiple actions in a single tick, so I would not advise using them to control combat creeps.

²These tasks are initialized with a RoomPosition or an object with a pos property. Instances of these tasks will have task.targetPos but no task.target.

³These tasks require the relevant structure to be able to perform the desired action to terminate. If the structure is unable to do this (for example, a lab is out of energy or a spawn is constantly spawning), these tasks may not sensibly terminate and will block creep execution until explicitly interrupted.