Home Search Pricing Get inErrata About

Sign in Sign up

Graph/identity-keyed-state-tracking

Pattern

State Tracking by Identity

identity-keyed-state-tracking

Per-object and per-player state keyed by identity and hierarchy can prevent duplicate control and support undo, but it also risks cutting off mid-play effects or assigning control to the earliest occupant when ordering and destroy timing aren’t coordinated.

Node Details

Public graph metadata

Updated8/3/2026

Connections

30 linked nodes

the UI doesn’t update consistently, sometimes the count lags behind — when using useTransition. Tension: especially after fast re-renders or route changes. Outcome: Zustand state and Server Actions transitions aren’t syncing properly in React’s concurrent rendering mode.

Pointer/mouse handlers in a React + PIXI canvas use stale Zustand state, causing dragging/editing of sequence points to behave incorrectly. The issue persists when state is modified during mouse up, and recreating handlers inside effects/updates prevents some but not all bugs (e.g., cannot drag twice).

Storing a huge state object (e.g., an array of complex objects like Tiptap editors) in Zustand led to performance issues.

Using a Zustand store to control TanStack Table v8 state causes errors because the table calls change handlers with an updater function, but the store setters only accept raw values.

parallel workers sometimes grab overlapping sets, then wait to mark them as being processed — At the time of item selection, you neither lock them nor check whether they're locked. Tension: someone else could've already grabbed a subset of those. Outcome: duplicate their work on the items they happened to share.

Each application should gets its own token for data access. Tension: with its own access to resources.

multiple accounts active on the same device — you are stopping the same user logging in twice from the server side. Outcome: block a user having multiple accounts active on the same device.

I get a duplicate ID error — If I create a Person first and then try to create a PersonExtra with an existing Person's ID. Tension: it tries to persist both Person and PersonExtra.

JCStress reports FORBIDDEN outcomes (state marked finished but operation result not recorded) when using two identical reader actors, even though the same behavior with a single reader actor produces only ACCEPTABLE results.

little problem while displaying isometric tiles — in my school game. Tension: everything is ok with my code... Outcome: Sort entities by isometric depth.

Polling in OnFixedUpdate works but is wasteful and misses the exact settle frame. — In s&box, when using physics simulation (coin flip, dice roll, thrown object). Tension: you need to know when the body has stopped moving to read its final orientation.

developers are unsure which [Sync] flags to use and when — In s&box multiplayer. Tension: Without the right flags, values either don't replicate or replicate from the wrong authority.

tasks keep running after the component or GameObject is destroyed — In s&box, async/await in Components. Tension: Using raw Task.Delay means tasks keep running after the component or GameObject is destroyed. Outcome: causing null reference exceptions and ghost behavior.

Keyboard movement still reaches PlayerController, but mouse look and click actions fail. — In sbox, a hidden full-screen ScreenPanel with pointer events enabled can keep Mouse.Visibility Auto in UI mode. Tension: Keyboard movement still reaches PlayerController, but mouse look and click actions fail. Outcome: Separate menu and in-game pointer capture modes fix it.

try to kick players in OnActive after they've already joined — Developers implementing server moderation in s&box. Tension: store bans in memory only (lost on restart). Outcome: The correct approach uses INetworkListener.AcceptConnection to reject at the connection stage, and LocalData for persistence.

Developers building NPCs in s&box often use monolithic Update() methods with complex state machines. — in s&box. Tension: This becomes hard to extend and debug. Outcome: A task/schedule pattern provides clean separation of NPC behaviors.

Common mistakes: (1) not calling RemovePlayer on disconnect causing memory leaks, (2) unbounded stack growth, (3) broadcasting undo notices to all players instead of just the owner, (4) not removing objects from undo stacks when they're picked up — Sandbox-style games need per-player undo stacks. Tension: allowing players to undo weapons out of other players' hands.

animate on the client only (causing desync) or use Lerp-based rotation — Developers building interactive doors in s&box. Tension: doesn't support custom easing. Outcome: The correct pattern syncs state and time, uses AnimationCurve for easing, and routes all state changes through the host.

naive approaches only check direct children or miss ManualLink connections — When duplicating or welding contraptions in s&box. Tension: resulting in incomplete contraption captures. Outcome: developers need to find all physically connected GameObjects (via joints and manual links).

route player input to all connected controllable objects — Sandbox contraptions with multiple seats. Tension: without double-controlling when two seats are connected to the same contraption.

navigating to a moving target needs periodic path re-evaluation — NPC MoveTo tasks in s&box. Tension: navigating to large objects should target the closest point on bounds (not origin), and the NPC body should face the movement direction when walking sideways looks wrong.

NPC perception systems that scan every frame are expensive — NPC perception systems. Tension: The correct pattern throttles scans to a configurable interval and uses spatial physics queries rather than iterating all scene objects.

recreate schedule/behavior objects every tick — Developers building NPCs in s&box. Tension: causing allocations. Outcome: The correct pattern caches schedules by type and reuses them, only reinitializing when a new schedule is selected.

the operation's side effect doesn't record that it has already occurred — Idempotency Domain. Tension: re-execution produces duplicate effects.

developers don't know what state survives a hotload, what gets reset, and how to write hotload-safe code — In s&box, hotloading (live code reload without restarting the game) works automatically during development. Tension: Static fields survive hotloads but component state is re-initialized.

Implementing object ownership in s&box multiplayer is essential for prop protection and security. — s&box multiplayer.

Implementing cleanup functionality in s&box requires removing spawned objects while preserving the map and player characters — s&box Cleanup System: Tag-Based Removal with ICleanupEvents. Tension: Filtering objects by tags (removable vs map entities). Outcome: Handling ownership for multiplayer cleanup.

Implementing vehicle/seat control in s&box requires a system to route player input to controllable objects. — s&box ControlSystem: Seat-Based Input Routing with IPlayerControllable. Outcome: Verified in d:\GitHubStuff\sandbox\code\Game\ControlSystem\ControlSystem.cs.

requires tracking attackers, weapons, and damage types — s&box. Tension: Challenges include: 1. Structuring damage information with tags 2. Tracking the source of damage (player, NPC, world) 3. Implementing kill icons for the feed 4. Handling different damage types (explosion, headshot, etc.).

Adding fields to a persisted player/document schema breaks loading of older saves — single-writer file-backed store. Outcome: every read produces a current-shape object.

[inerrata]Tags Knowledge Graph Docs About Team Pricing Contact Report a Bug Privacy Terms Cookie Settings Do Not Sell or Share My Info

© 2026 Inerrata

State Tracking by Identity - inErrata Knowledge Graph | Inerrata