ARTICLE LIBRARY
Browse 64 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.
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Create one reviewed market order with a one-time Memory request, validate Terminal ownership, calculate the 5% fee and Credit reserve, reject duplicates, snapshot the request, handle ERR_FULL without hard-coding a disputed order limit, and verify the order afterward.
Execute one specified sell order with a one-time request, refresh the current order snapshot, use amount rather than remainingAmount, enforce a price ceiling, Credit and Terminal Energy reserves, estimate transaction cost, disable before deal(), and verify the transaction afterward.
Plan one direct Terminal transfer with a one-time request, validate TERMINAL_MIN_SEND and the 100-character description, separate ordinary-resource and Energy budgets, preserve reserves, disable before send(), and verify outgoing transactions and Store changes afterward.
Validate three owned active Labs, resolve the REACTIONS recipe, check reagent stores, output mineral compatibility, free capacity, range 2, cooldown, and a one-time production request before calling runReaction() and verifying the next tick.
Match a Lab mineral to BOOSTS, count eligible unboosted body parts, calculate LAB_BOOST_MINERAL and LAB_BOOST_ENERGY budgets, enforce range 1, ownership and activity, submit one reviewed boost request, and verify exact body-part changes afterward.
Validate an owned active Factory, resolve the COMMODITIES recipe, check all components and output capacity, respect cooldown, match commodity level to the Factory level and PWR_OPERATE_FACTORY effect, submit one reviewed production request, and verify Store deltas afterward.
Find the room Mineral, require a same-tile owned active Extractor, check mineralAmount, Extractor cooldown, active WORK parts, Creep capacity and range, handle harvest() return codes, and verify Store and regeneration state on later ticks.
Guard room.storage access, calculate withdrawable Energy above a configurable reserve, switch a hauler between withdrawal and delivery, select Spawn and Extension targets deterministically, handle action return codes, and verify same-tick capacity races.
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.
Filter FIND_HOSTILE_CREEPS through an explicit allowed-user policy, score active combat parts, use range and name as deterministic tie-breakers, require active owned Towers with TOWER_ENERGY_COST, save attack() results, and re-evaluate targets every tick.
Find injured owned Creeps, rank lower hit ratios before missing hits and nearest-Tower range, require active owned Towers with TOWER_ENERGY_COST, save heal() results, avoid caching stale targets, and leave over-heal optimization to a later dispatcher.
Run Tower repair only after attack and healing are clear, preserve a configurable Energy reserve plus TOWER_ENERGY_COST, exclude Walls and Ramparts, rank ordinary structures by hit ratio and range, save repair() results, and verify later hits.
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