Screeps renewCreep(): Requirements, Cost, and Return Codes
Learn StructureSpawn.renewCreep() requirements, TTL and Energy formulas, Boost and CLAIM limits, return codes, and how to verify renewal on the next tick.
ARTICLE LIBRARY
Practical Screeps articles for the problem you need to solve
Browse 81 published guides by system, difficulty, content type, or topic. Start with What Is Screeps? A Programming Strategy Game or follow the beginner sequence through How to Combine Your First Screeps Room Loop.
Screeps Lab boostCreep(): Requirements, Usage, and Return Codes
Learn StructureLab.boostCreep() requirements, bodyPartsCount usage, return codes, current-tick scheduling, and how to verify exact boosted body parts afterward.
Screeps processPower(): Energy Ratio, GPL, and Reserves
Recover an owned active Power Spawn, calculate base and PWR_OPERATE_POWER processing amounts, require Power and POWER_SPAWN_ENERGY_RATIO Energy, preserve a configurable room reserve, store GPL and resource snapshots, handle return codes, and verify later deltas.
Screeps Terminal.send(): Prevent Intent Overwrite and Verify Actual Amount
Freeze one transfer revision, reserve the exact Terminal against send and market-deal conflicts, submit once, normalize ledger descriptions, and verify the actual full or partial outgoing transaction next tick.
Screeps CPU Bucket Degradation: Protect Critical Tasks and Recover Gradually
Build a four-mode Screeps CPU degradation scheduler with hysteresis, consecutive-tick confirmation, critical-first task tiers, stable staggering, CPU headroom guards, and gradual recovery.
How to Maintain Screeps Market Orders Safely
Change, extend, or cancel one owned Screeps market order with nullable room fingerprints, conservative fee budgeting, one-writer request IDs, raw return codes, and next-tick state verification.
Screeps Store API: getUsedCapacity, getFreeCapacity, and null
Distinguish general, limited, and read-only Stores; interpret resource arguments, zero and null correctly; handle Lab and specialized capacities; and calculate safe withdraw and transfer amounts.
Screeps createOrder(): Bind One Request to the New Order ID
Freeze one reviewed order revision, reserve the creation fee and account mutation slot, call createOrder once, and verify the exact new order ID in the next account snapshot.
Screeps market.deal(): Reserve the Terminal and Verify Actual Amount
Freeze one reviewed deal revision, reserve both an account deal slot and the exact Terminal, submit once, and verify the new transaction ID and actual partial or full amount next tick.
Screeps activateSafeMode(): Prevent Same-Tick Intent Overwrite
Route every Safe Mode request through one final per-tick dispatcher, bind the exact Controller ID, disable the request before activateSafeMode(), and verify activation consumption on the next tick.
Screeps Structure.destroy(): Verify One Exact Extension Removal
Bind confirmation to the exact Extension and owned room, block hostile Creeps and Power Creeps, submit one queued destroy call, then distinguish original-ID removal from a later replacement at the tile.
Screeps Factory.produce(): Verify One Production Batch
Separate permanent Factory level from the active Power effect, snapshot every recipe component, submit one batch, and verify exact output and component deltas under an exclusive Store window.
Publication standard
English articles are published only after source review, official API checks where applicable, JavaScript syntax review where code is present, duplicate-intent and link checks, and editorial review. Publication does not imply Console or multi-tick live-room verification; those evidence states remain separate in each guide. Review the verification method.