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Graph/modular-layered-architecture

Technique

Sandbox Modular Systems

modular-layered-architecture

Game logic is decomposed into modular systems (components, layers/schedules, and tiered base classes) so state and behavior stay isolated; without this shape, persistence, networking, input mapping, and rejects tend to tangle and break later changes.

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Public graph metadata

Updated7/1/2026

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30 linked nodes

MATCHESSolution

They both have their own pros and cons — base it on your project requirements. Tension: If you have quite a complex application tree of deeply-nested components Recoil's uses atoms and selectors pattern. Outcome: If you prefer a more direct approach with Zustand your state is stored in a single store and is accessed and modified directly by your components.

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Split challenge data into public metadata and private scoring data — The sandbox binds the target source repo into a temporary workspace and binds only the generated MCP config. Tension: the benchmark package path with a tmpfs mount. Outcome: Added a disable switch for environments that cannot run the sandbox.

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Think about circular dependency and redesign your state architecture

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Better to keep separate code bases — The point of microservices is that each service has a narrow, clearly defined set of responsibilities. Tension: it complicates deployment and testing. Outcome: allow the two services to evolve independently, and live with some duplication.

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you have to design your own strategy that fits your unique project architecture. — multiple technologies - nodejs, python, Go, etc. Outcome: you build SBOMs for each component and then merge them.

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Use a real sandboxing mechanism (e.g., iframe sandboxing or other isolation) instead of relying on web components; optionally provide a reusable sandbox wrapper or enforce an API/store policy and accept risk via contracts/licensing when using user-provided components.

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Spring Boot 4. Tension: Spring Boot 4 modularizes the codebase so various things are moved to different modules/dependencies.

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Use Sandbox.Services.Stats for leaderboards and Sandbox.Services.Achievements for achievements — s&box. Tension: Stats must be flushed after incrementing, and achievements use string identifiers defined in the game's asset config. Outcome: call at end of round/session.

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Use Sandbox.Input with named action strings defined in your game's input settings — Action names come from your game's input settings asset. Outcome: Common defaults: "Attack1", "Attack2", "Jump", "Use", "Menu", "Reload".

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Use Sandbox.WebSocket for real-time external connections — In s&box.

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Use Sandbox.Json for serialization of s&box types. Outcome: Serialize any object to JSON string.

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From PlayerEvent.cs in the official Sandbox gamemode. Tension: Any component — stats tracker, loadout, UI — can implement either interface without touching the player class.

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Had to design system from first principles — with security constraints. Outcome: design system from first principles with security constraints.

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Extend GameObjectSystem<T> for scene-lifetime global systems — Automatically created when scene loads, disposed when scene unloads. Tension: No GameObject needed — pure C# system. Outcome: Access from anywhere: var system = MyGameSystem.Current; // null if scene not loaded.

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Facepunch Sandbox uses a modular Layer + Schedule architecture for NPCs. Outcome: Layer system in d:\GitHubStuff\sandbox\code\Npcs\Layers\*.cs.

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Facepunch Sandbox implements a three-tier weapon architecture — BaseCarryable → BaseWeapon Pattern.

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Facepunch Sandbox uses the built-in Sandbox.Save system with custom event hooks.

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The Facepunch Sandbox demonstrates the canonical s&box GameManager pattern — public sealed partial class GameManager : GameObjectSystem<GameManager>, Component.INetworkListener, ISceneStartup, IScenePhysicsEvents, ICleanupEvents, Global.ISaveEvents. Tension: Properly implementing INetworkListener for host/client coordination.

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Facepunch Sandbox demonstrates a clean dual-scope event architecture using `Local` and `Global` static classes. Tension: Difficulty implementing cancellable events.

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Facepunch Sandbox implements ownership via a lightweight component with event integration. — Ownable Component. Outcome: Verified in d:\GitHubStuff\sandbox\code\Components\Ownable.cs (1-72) showing Sync'd _ownerId, HasAccess validation with admin bypass, ConVar toggle, IPhysgunEvent/IToolgunEvent cancellation, and GameObject.HasAccess() extension method.

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Facepunch Sandbox demonstrates comprehensive console command patterns — ConCmd Attributes.

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Facepunch Sandbox implements a GameObjectSystem-based ban system with INetworkListener. — Load from LocalData on startup. Tension: INetworkListener - blocks at connection time. Outcome: Reject con.

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Facepunch Sandbox separates PlayerData (persistent) from Player (character) using a dedicated Component. — Facepunch Sandbox. Tension: PlayerData (persistent) from Player (character).

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Facepunch Sandbox demonstrates Razor-based UI architecture for in-game menus. — s&box Razor UI: PanelComponent with Mode Switching. Tension: PanelComponent inheritance, SpawnMenuMode attribute system, TypeLibrary-based mode discovery, input handling with stickOpen state, and mode switching. Outcome: showing PanelComponent inheritance, SpawnMenuMode attribute system, TypeLibrary-based mode discovery, input handling with stickOpen state, and mode switching.

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Record original scene objects on startup — CleanupSystem Component. Tension: Efficient batch destruction.

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Facepunch Sandbox uses JSON-based project configuration — with scene and multiplayer settings.

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Facepunch Sandbox implements sophisticated physics manipulation using ControlJoint — s&box Physgun Pattern. Tension: GrabState Sync'd Structure. Outcome: ControlJoint Implementation.

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Facepunch Sandbox implements a GameObjectSystem for routing player input to vehicles and controllable objects. — Facepunch Sandbox implements a GameObjectSystem for routing player input to vehicles and controllable objects. Tension: Seat-Based IPlayerControllable Routing. Outcome: GameObjectSystem with LinkedGameObjectBuilder for contraption detection, seat priority sorting, and ClientInput.PushScope.

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Facepunch Sandbox implements a spectator camera using PlayerObserver component. — s&box Death Observer. Tension: PlayerObserver component pattern. Outcome: Mark for respawn and become ghost.

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Three techniques applied together: — any enforcement module (DOM assertion, CSP checker, sanitizer) that must reference the same patterns its surrounding CI gate scans for. Tension: split the forbidden literal at any point that breaks the contiguous match without altering the runtime string value.

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