#gameplay

The method for feel-first traversal on a kinematic trace-based character: coyote-time jumps, double jump, mantle, slide, wall run, node climbing, and rope swinging, plus the ground-contact quality work that makes all of it read smooth.

The proven architecture for driving games in s&box: raycast wheels on a single chassis Rigidbody, substepped slip-ratio/slip-angle tire physics with peaked curves, a torque-curve drivetrain, layered assists, and arcade dials on top of a sim core.

Components.Get<SkinnedModelRenderer>() only searches the same GameObject: a renderer on a child returns null, silently no-oping every Set() call.

Dev-host streaming sends assemblies and compiled assets but NOT loose data files read via FileSystem.Mounted: a joining client that loads a raw JSON manifest builds differently, silently.

Jump() helpers clamp against rising velocity, eating the second impulse. Set Velocity.z directly for a reliable double jump.

Foot-slide happens when PlaybackRate is tied to movement top speed instead of the clip's own authored stride distance.

GameTask.RunInThreadAsync for parse/math; main thread only for engine objects; Yield every N items for loading UI.

A static Instance claimed behind if (!IsProxy) in OnStart grabs the host's character on a joining client: the client camera follows the wrong player forever.

Always handle tr.StartedSolid: ignore that frame so an overlapped body can walk free; slide-trace the wish onto the hit plane.

sbox.exe -joinlocal +instanceid 1 gives you a real second peer against an editor host with no publish, no second Steam account, and no lobby discovery. It has no host selector: it joins whichever local editor is in PLAY MODE, so no other editor on the machine may be playing.

OfType<IInteractable> on GetAllComponents<Component> returns nothing: GetAllComponents answers off a concrete-type index, so enumerate concrete types (or a shared abstract base) and union them.

A singleton claimed in OnEnabled and nulled in OnDisabled traps any re-adopt poll that gates on Instance.IsValid(): the entity is never re-driven after a disable.

[Sync] owner→proxies, IsProxy early-out; FromHost for shared truth. Every object carrying a [Sync] field has to be NetworkSpawned, singletons included.

FlatBox/Prop/Deco/Wire helpers plus Obstacle records as plain data beat physics queries for build validity.

OnAwake runs synchronously inside Components.Create: set singletons there; derive from [Property] in OnStart after spawn helpers assign.

DTOs + one spawn path + deterministic static world: guard restored defaults; keep enums append-only.

A component with Enabled = false is invisible to GetAllComponents: search returns null even though the component exists.

A trace-based ground controller flickers Ground/Air on seams, re-firing landing VFX mid-run. Require minimum air time before a JustLanded counts.

static Instance set in OnAwake, cleared in OnDestroy: everything reads Foo.Instance with null-guards, no inspector wiring.

A hand-integrated trace mover has no collider component: ITriggerListener and OnTriggerEnter never fire. Use distance-polling instead.

Even-time samples of a ballistic arc cluster at the slow apex and spread at the fast ends: sample by arc length for evenly spaced preview dots.