Screeps upgradeController(): Build Your First Upgrader Loop
Build one Upgrader1 loop that harvests from an active Source, moves within Controller range 3, spends Energy with upgradeController(), and switches state across ticks.
TOPIC · 4 GUIDES
Controllers Screeps guides
Focused English articles connected to controllers, organized with the same filters used by the main article library.
4 matching guides
How to Activate Safe Mode Without Accidental Repeated Use
Use an explicit one-time Memory request, confirmation phrase, owned Controller checks, safeMode, safeModeAvailable, safeModeCooldown and upgradeBlocked preflight, disable before activateSafeMode(), save the return code, and verify later state.
How to Detect Controller Downgrade Risk and Recover Safely
Compare ticksToDowngrade with configurable enter and recovery thresholds, use CONTROLLER_DOWNGRADE for context, select an owned ready Upgrader with Energy and active WORK, move to range 3, save upgradeController() results, and exit emergency mode only after recovery.
How to Choose Between Reserving and Claiming a Controller
Separate renewable remote-room reservations from one-time room ownership, require an active CLAIM part and range 1, block owned Controllers and hostile reservations, require explicit claim confirmation and GCL capacity, save return codes, and stop a claim mission after OK.