Capability packs are the canonical declaration layer for netcode-relevant engine capabilities. A pack describes every surface a capability touches: components, script SDK hosts, Script IR nodes, authoring patterns, runtime system contributions, replication, prediction, lag compensation, anti-cheat, expected side effects, Engine Contract Packet contributions, and test scenarios.

The schema lives in packages/protocol/src/index.ts as CapabilityPackSchema and its sub-declarations. The runtime registry lives in server/src/modules/runtime/capabilities/registry.ts; registered packs live in server/src/modules/runtime/capabilities/packs.ts.

Registered pack count: 24.

Status semantics:

implemented: active runtime, SDK, component, projection, or side-effect surface exists in the current engine.
declarative: registry metadata exists but no active runtime or SDK side-effect surface is declared.
reference: example/future pack shape only; not active in the current registry.

Inventory

Pack ID	Status	Components	SDK hosts	Runtime systems	Replication	Anti-cheat
`physics.v1`	implemented	`ColliderComponent`, `RigidBodyComponent`, `VelocityComponent`, `ForceComponent`, `CharacterMovementComponent`	`ctx.physics.command`, `ctx.physics.occupancyQuery`, `ctx.physics.overlapTest`, `ctx.physics.raycast`, `ctx.physics.shapecast`	`30:runtime.physicsSystem`, `90:runtime.collisionSystem`	`ColliderComponent->public/medium`, `ForceComponent->server/medium`, `RigidBodyComponent->public/medium`, `VelocityComponent->public/medium`	`physics.force_bounds`
`input.v1`	implemented	`InputProfileComponent`	None	`28:runtime.movementSystem`, `29:runtime.movementLivenessSystem`, `110:runtime.actionSystem`	`InputProfileComponent->owner/high`	`input.profile_version`, `input.rate_limit`
`audio.v1`	implemented	`AudioEmitterComponent`	`ctx.audio.play`, `ctx.audio.playSpatial`, `ctx.audio.setBackgroundMusic`, `ctx.audio.setVolume`, `ctx.audio.stop`	None	`AudioEmitterComponent->public/low`	None
`camera.v1`	implemented	`CameraComponent`	`ctx.camera.addLookInput`, `ctx.camera.setLookSensitivity`, `ctx.camera.setPitchClamp`, `ctx.camera.setViewTarget`	None	`CameraComponent->public/medium`	None
`spawn.v1`	implemented	None	`ctx.world.despawn`, `ctx.world.spawn`	`24:runtime.characterSystem`	None	`spawn.bounds`
`timer.v1`	implemented	`TimerComponent`	None	`140:runtime.timerSystem`	`TimerComponent->public/low`	None
`hierarchy.v1`	implemented	`TransformComponent`	`ctx.entity.ancestors`, `ctx.entity.children`, `ctx.entity.descendants`, `ctx.entity.detach`, `ctx.entity.parent`, `ctx.entity.setParent`, `ctx.entity.worldPosition`, `ctx.entity.worldRotation`	`25:runtime.hierarchyTransformSystem`	`TransformComponent->public/high`	`hierarchy.server_authority`
`mutation.v1`	implemented	None	`ctx.entity.addComponent`, `ctx.entity.hasTag`, `ctx.entity.patchComponent`, `ctx.entity.readComponent`, `ctx.entity.removeComponent`, `ctx.entity.removeTag`, `ctx.entity.replaceComponent`, `ctx.entity.setName`, `ctx.entity.setTag`, `ctx.tween.cancel`, `ctx.tween.start`	`0:runtime.componentPatchSystem`	None	None
`script.v1`	implemented	`ScriptComponent`	`ctx.events.emit`, `ctx.log`, `ctx.random`, `ctx.random.bool`, `ctx.random.gaussian`, `ctx.random.int`, `ctx.random.pick`, `ctx.random.pointInCircle`, `ctx.random.pointInSphere`, `ctx.random.range`, `ctx.random.seeded`, `ctx.random.shuffle`, `ctx.random.sign`, `ctx.random.unitVector`, `ctx.random.weightedPick`	`0:runtime.componentPatchSystem`, `10:runtime.observerCommandSystem`, `20:runtime.scriptSystem`	`ScriptComponent->server/low`	`script.sandbox`, `script.host_budget`
`ui.v1`	implemented	None	`ctx.ui.closePanel`, `ctx.ui.openPanel`, `ctx.ui.setWidgetValue`	`19:runtime.uiBindingWriteSystem`, `19:runtime.uiEventSystem`	None	None
`persistence.v1`	implemented	None	`ctx.warehouse.append`, `ctx.warehouse.create`, `ctx.warehouse.delete`, `ctx.warehouse.get`, `ctx.warehouse.increment`, `ctx.warehouse.query`, `ctx.warehouse.set`, `ctx.warehouse.transform`, `ctx.warehouse.update`	`26:runtime.ownedInstancePersistenceSystem`	None	`persistence.prefetch_only`, `persistence.drain_audit`
`match.v1`	implemented	None	`ctx.match.addScore`, `ctx.match.getScore`, `ctx.match.getState`, `ctx.match.patchObjective`, `ctx.match.setPhase`, `ctx.room.getPlayers`, `ctx.room.getState`	`150:runtime.lifecycleSystem`	None	None
`lifecycle.v1`	implemented	None	None	`19:runtime.possessionCommandSystem`, `20:runtime.purchaseFulfillmentCommandSystem`, `21:runtime.scriptSystem`	None	None
`team.v1`	implemented	None	`ctx.team.getAssignment`	None	None	None
`objective.v1`	implemented	None	None	None	None	None
`rendering.v1`	implemented	`RenderableComponent`, `SpatialCaptureComponent`, `MaterialInstanceOverrideComponent`, `AnimationStateComponent`, `LightComponent`, `TerrainComponent`, `WaterComponent`, `ReflectionProbeComponent`, `LocalEnvironmentVolumeComponent`, `DecalComponent`, `HairComponent`, `ParticleEmitterComponent`, `TextRenderableComponent`, `HighlightComponent`	`ctx.terrain.heightAt`, `ctx.terrain.normalAt`, `ctx.terrain.raycastDown`, `ctx.terrain.sampleLayerWeights`, `ctx.terrain.slopeAt`, `ctx.water.isSubmerged`, `ctx.water.surfaceLevelAt`	None	`AnimationStateComponent->public/low`, `DecalComponent->public/low`, `HairComponent->public/low`, `HighlightComponent->public/low`, `LightComponent->public/low`, `LocalEnvironmentVolumeComponent->public/low`, `MaterialInstanceOverrideComponent->public/low`, `ParticleEmitterComponent->public/low`, `ReflectionProbeComponent->public/low`, `RenderableComponent->public/low`, `SpatialCaptureComponent->public/low`, `TerrainComponent->public/low`, `TextRenderableComponent->public/low`, `WaterComponent->public/low`	None
`world.v1`	implemented	`NavAgentComponent`	`ctx.navigation.findPath`, `ctx.navigation.isReachable`, `ctx.navigation.nearestPoint`, `ctx.navigation.raycast`, `ctx.navigation.steerToward`, `ctx.world.find`, `ctx.world.query`	None	`NavAgentComponent->public/medium`	None
`worlds.v1`	implemented	None	`ctx.world.teleportPlayer`	`22:runtime.scriptSystem`	None	`worlds.teleport_authority`
`prefabs.v1`	implemented	None	`ctx.world.spawn`, `ctx.world.spawnPrefab`	`23:runtime.scriptSystem`	`TransformComponent->public/high`	`prefabs.parent_first`
`platform.v1`	implemented	None	`ctx.platform.exitFullscreen`, `ctx.platform.exitPointerLock`, `ctx.platform.requestFullscreen`, `ctx.platform.requestPointerLock`	None	None	`platform.user_gesture`
`network.v1`	implemented	`NetworkProfileComponent`	`ctx.network.sendMessage`	None	`NetworkProfileComponent->public/high`	`network.channel_allowlist`, `network.rate_limit`
`character.v1`	implemented	None	`ctx.players.eliminate`, `ctx.players.get`, `ctx.players.list`, `ctx.players.possess`, `ctx.players.release`, `ctx.players.spawnCharacter`	None	None	None
`ownership.v1`	implemented	None	`ctx.entity.setOwner`, `ctx.world.entityHasTag`, `ctx.world.setEntityOwner`, `ctx.world.setEntityTag`	None	None	None
`commerce.v1`	implemented	None	`ctx.commerce.owns`, `ctx.commerce.promptPurchase`, `ctx.inventory.grant`	None	None	None

Registry Consumers

Runtime system order is derived from implemented runtimeContributions.
Replication default component visibility derives from pack replication.
Script host APIs served by the backend derive from pack sdkFunctions.
Engine Contract Packet component/runtime/script summaries merge pack-derived surfaces.
Lag compensation, prediction, and anti-cheat declarations are exposed as registry-derived views.

Package-level catalogs such as @game-platform/script-nodes remain the concrete declaration home for existing implemented script nodes. The capability registry verifies and traces those declarations to packs.

Drift Guards

server/tests/capability-pack-canonical.test.ts fails when a built-in component, implemented SDK host function, Script IR node, authoring pattern, replication declaration, prediction declaration, lag-compensation declaration, anti-cheat declaration, runtime contribution, or packet contribution drifts away from the pack registry.

npm run gen-docs:check fails when this generated inventory differs from source.

Adding A Capability

Add one CapabilityPack entry to runtimeCapabilityPacks with a stable versioned id.
Declare components, SDK hosts, Script IR nodes, authoring patterns, runtime contributions, replication, prediction, lag compensation, anti-cheat, side effects, and test scenarios.
Implement every runtime system and SDK host referenced as implemented.
Run npm run gen-docs:check and the capability-pack canonical tests.

physics.v1

Authoritative collider, rigid body, velocity, internal force queue, Physics.command writes, and deterministic physics query primitives.

Surface	Current declarations
Status	implemented
Components	`ColliderComponent`, `RigidBodyComponent`, `VelocityComponent`, `ForceComponent`, `CharacterMovementComponent`
SDK hosts	`ctx.physics.command`, `ctx.physics.occupancyQuery`, `ctx.physics.overlapTest`, `ctx.physics.raycast`, `ctx.physics.shapecast`
Script IR nodes	`host.physics.command`, `host.physics.occupancy_query`, `host.physics.overlap_test`, `host.physics.raycast`, `host.physics.shapecast`
Runtime systems	`30:runtime.physicsSystem`, `90:runtime.collisionSystem`
Replication	`ColliderComponent->public/medium`, `ForceComponent->server/medium`, `RigidBodyComponent->public/medium`, `VelocityComponent->public/medium`
Prediction	None
Lag compensation	None
Anti-cheat	`physics.force_bounds:reject`
Expected side effects	`component_patched:ForceComponent:within_tick`, `event_emitted:RuntimeCollisionEnter:within_tick`
Test scenarios	`physics.query.hosts.resolve`, `physics.command.buffers_force_entry`, `physics.collider_material_sync`

input.v1

Input action declaration, binding, context stack, and action command policy primitives.

Surface	Current declarations
Status	implemented
Components	`InputProfileComponent`
SDK hosts	None
Script IR nodes	`event.action`
Runtime systems	`28:runtime.movementSystem`, `29:runtime.movementLivenessSystem`, `110:runtime.actionSystem`
Replication	`InputProfileComponent->owner/high`
Prediction	`player.action:server_authoritative`
Lag compensation	None
Anti-cheat	`input.profile_version:reject`, `input.rate_limit:reject`
Expected side effects	`event_emitted:InputActionResolved:within_tick`
Test scenarios	`input.action.declaration_policy`

audio.v1

Audio emitter components and canonical script host functions for audio cues.

Surface	Current declarations
Status	implemented
Components	`AudioEmitterComponent`
SDK hosts	`ctx.audio.play`, `ctx.audio.playSpatial`, `ctx.audio.setBackgroundMusic`, `ctx.audio.setVolume`, `ctx.audio.stop`
Script IR nodes	`host.audio.play`, `host.audio.play_spatial`, `host.audio.set_background_music`, `host.audio.set_volume`, `host.audio.stop`
Runtime systems	None
Replication	`AudioEmitterComponent->public/low`
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`host_call_made:Audio.play:within_tick`, `projection_changed:AudioEmitterComponent:within_tick`
Test scenarios	`audio.hosts.buffer_ops`

camera.v1

Camera component and renderer camera projection metadata; behavior authors mutate camera state through component atoms.

Surface	Current declarations
Status	implemented
Components	`CameraComponent`
SDK hosts	`ctx.camera.addLookInput`, `ctx.camera.setLookSensitivity`, `ctx.camera.setPitchClamp`, `ctx.camera.setViewTarget`
Script IR nodes	`host.camera.add_look_input`, `host.camera.set_look_sensitivity`, `host.camera.set_pitch_clamp`, `host.camera.set_view_target`
Runtime systems	None
Replication	`CameraComponent->public/medium`
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`component_patched:CameraComponent:within_tick`
Test scenarios	`camera.component_schema`

spawn.v1

Canonical direct entity spawn and authorized despawn host primitives.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.world.despawn`, `ctx.world.spawn`
Script IR nodes	`host.world.despawn`, `host.world.spawn`
Runtime systems	`24:runtime.characterSystem`
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	`spawn.bounds:reject`
Expected side effects	`entity_spawned:runtime entity:within_tick`, `state_patch_emitted:entity.despawn:within_tick`
Test scenarios	`spawn.direct_despawn`

timer.v1

Authoritative timer component and timer script event dispatch.

Surface	Current declarations
Status	implemented
Components	`TimerComponent`
SDK hosts	None
Script IR nodes	`event.timer`
Runtime systems	`140:runtime.timerSystem`
Replication	`TimerComponent->public/low`
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`event_emitted:RuntimeTimerFired:within_tick`
Test scenarios	`timer.fires_on_interval`

hierarchy.v1

Structural entity hierarchy, traversal, and local-to-world transform projection.

Surface	Current declarations
Status	implemented
Components	`TransformComponent`
SDK hosts	`ctx.entity.ancestors`, `ctx.entity.children`, `ctx.entity.descendants`, `ctx.entity.detach`, `ctx.entity.parent`, `ctx.entity.setParent`, `ctx.entity.worldPosition`, `ctx.entity.worldRotation`
Script IR nodes	`host.entity.ancestors`, `host.entity.children`, `host.entity.descendants`, `host.entity.detach`, `host.entity.parent`, `host.entity.set_parent`, `host.entity.world_position`, `host.entity.world_rotation`
Runtime systems	`25:runtime.hierarchyTransformSystem`
Replication	`TransformComponent->public/high`
Prediction	None
Lag compensation	None
Anti-cheat	`hierarchy.server_authority:reject`
Expected side effects	`projection_changed:entity.world_transform:within_tick`, `state_patch_emitted:entity.reparent:within_tick`
Test scenarios	`hierarchy.local_to_world`

mutation.v1

Canonical entity mutation SDK: component add/patch/replace/remove, tags, names, and structural target authority.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.entity.addComponent`, `ctx.entity.hasTag`, `ctx.entity.patchComponent`, `ctx.entity.readComponent`, `ctx.entity.removeComponent`, `ctx.entity.removeTag`, `ctx.entity.replaceComponent`, `ctx.entity.setName`, `ctx.entity.setTag`, `ctx.tween.cancel`, `ctx.tween.start`
Script IR nodes	`host.entity.add_component`, `host.entity.has_tag`, `host.entity.patch_component`, `host.entity.read_component`, `host.entity.remove_component`, `host.entity.remove_tag`, `host.entity.replace_component`, `host.entity.set_name`, `host.entity.set_tag`, `host.tween.cancel`, `host.tween.start`
Runtime systems	`0:runtime.componentPatchSystem`
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`state_patch_emitted:component.patch:within_tick`, `state_patch_emitted:component.remove:within_tick`
Test scenarios	`mutation.component_remove`

script.v1

TypeScript script execution, core Script IR, custom events, Random.next, metrics, and debug host APIs.

Surface	Current declarations
Status	implemented
Components	`ScriptComponent`
SDK hosts	`ctx.events.emit`, `ctx.log`, `ctx.random`, `ctx.random.bool`, `ctx.random.gaussian`, `ctx.random.int`, `ctx.random.pick`, `ctx.random.pointInCircle`, `ctx.random.pointInSphere`, `ctx.random.range`, `ctx.random.seeded`, `ctx.random.shuffle`, `ctx.random.sign`, `ctx.random.unitVector`, `ctx.random.weightedPick`
Script IR nodes	`core.arithmetic`, `core.array.first`, `core.array.for_each`, `core.array.get`, `core.array.length`, `core.array.mutate`, `core.array.query`, `core.array.reduce`, `core.array.transform`, `core.bitwise`, `core.boolean`, `core.bounded.for`, `core.bounded.while`, `core.comparison`, `core.component.patch`, `core.component.read`, `core.entity.id`, `core.event.key`, `core.event.payload.get`, `core.expression.codebox`, `core.flow.break`, `core.flow.continue`, `core.flow.do_n`, `core.flow.do_once`, `core.flow.flip_flop`, `core.flow.gate`, `core.flow.multi_gate`, `core.flow.return`, `core.flow.timer.after`, `core.flow.timer.cancel`, `core.get`, `core.host.call`, `core.if`, `core.let`, `core.map`, `core.math`, `core.math.remap`, `core.not`, `core.object`, `core.quat`, `core.record.get`, `core.select`, `core.sequence`, `core.set`, `core.string`, `core.switch`, `core.value.array`, `core.value.assert`, `core.value.cast`, `core.value.coerce`, `core.value.literal`, `core.value.object`, `core.vec3`, `event.action`, `event.character_removed`, `event.character_spawned`, `event.custom`, `event.frame`, `event.init`, `event.match_ended`, `event.network_message`, `event.panel_action`, `event.phase`, `event.phase_exit`, `event.player_joined`, `event.player_left`, `event.purchase_fulfilled`, `event.resize`, `event.start`, `event.tick`, `event.timer`, `event.trigger`, `event.trigger_exit`, `event.widget_press`, `host.debug.log`, `host.events.emit`, `host.random.bool`, `host.random.gaussian`, `host.random.int`, `host.random.next`, `host.random.pick`, `host.random.point_in_circle`, `host.random.point_in_sphere`, `host.random.range`, `host.random.seeded`, `host.random.shuffle`, `host.random.sign`, `host.random.unit_vector`, `host.random.weighted_pick`
Runtime systems	`0:runtime.componentPatchSystem`, `10:runtime.observerCommandSystem`, `20:runtime.scriptSystem`
Replication	`ScriptComponent->server/low`
Prediction	None
Lag compensation	None
Anti-cheat	`script.sandbox:reject`, `script.host_budget:reject`
Expected side effects	`host_call_made:ScriptHostFunction:within_tick`, `event_emitted:CustomEvent:within_tick`
Test scenarios	`script.host_parity`

ui.v1

Runtime UI panel lifecycle, widget value, toast, and UI projection host APIs.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.ui.closePanel`, `ctx.ui.openPanel`, `ctx.ui.setWidgetValue`
Script IR nodes	`host.ui.close_panel`, `host.ui.open_panel`, `host.ui.set_widget_value`
Runtime systems	`19:runtime.uiBindingWriteSystem`, `19:runtime.uiEventSystem`
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`projection_changed:RuntimeUiProjection:within_tick`, `host_call_made:UI.setWidgetValue:within_tick`
Test scenarios	`ui.hosts.buffer_ops`

persistence.v1

Warehouse host functions with deterministic prefetch and post-script draining.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.warehouse.append`, `ctx.warehouse.create`, `ctx.warehouse.delete`, `ctx.warehouse.get`, `ctx.warehouse.increment`, `ctx.warehouse.query`, `ctx.warehouse.set`, `ctx.warehouse.transform`, `ctx.warehouse.update`
Script IR nodes	`host.warehouse.append`, `host.warehouse.create`, `host.warehouse.delete`, `host.warehouse.get`, `host.warehouse.increment`, `host.warehouse.query`, `host.warehouse.set`, `host.warehouse.transform`, `host.warehouse.update`
Runtime systems	`26:runtime.ownedInstancePersistenceSystem`
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	`persistence.prefetch_only:reject`, `persistence.drain_audit:reject`
Expected side effects	`host_call_made:Warehouse.update:within_tick`
Test scenarios	`persistence.prefetch_required`

match.v1

Room, match, lifecycle phase, ready-check, and authoritative match transition primitives.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.match.addScore`, `ctx.match.getScore`, `ctx.match.getState`, `ctx.match.patchObjective`, `ctx.match.setPhase`, `ctx.room.getPlayers`, `ctx.room.getState`
Script IR nodes	`host.match.add_score`, `host.match.get_score`, `host.match.get_state`, `host.match.patch_objective`, `host.match.set_phase`, `host.room.get_players`, `host.room.get_state`
Runtime systems	`150:runtime.lifecycleSystem`
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`projection_changed:RuntimeMatchLifecycleState:within_tick`
Test scenarios	`match.phase_transition`

lifecycle.v1

Player joined, player left, and match ended script lifecycle events.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	None
Script IR nodes	`event.match_ended`, `event.player_joined`, `event.player_left`
Runtime systems	`19:runtime.possessionCommandSystem`, `20:runtime.purchaseFulfillmentCommandSystem`, `21:runtime.scriptSystem`
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`event_emitted:player.joined:within_tick`, `event_emitted:player.left:within_tick`, `event_emitted:match.ended:within_tick`
Test scenarios	`lifecycle.player_match_events`

team.v1

Team assignment and multiplayer team policy primitives.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.team.getAssignment`
Script IR nodes	`host.team.get_assignment`
Runtime systems	None
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`projection_changed:RuntimeTeamAssignment:within_tick`
Test scenarios	`team.assignment_read`

objective.v1

Warehouse-backed gameplay state conventions and match/team projections.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	None
Script IR nodes	None
Runtime systems	None
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`projection_changed:warehouse-backed gameplay state:within_tick`
Test scenarios	`objective.compatibility_migrated_to_warehouse`

rendering.v1

Renderer component atomics for renderables, animation state, lights, terrain, water, reflection probes, decals, particles, text, and material override components.

Surface	Current declarations
Status	implemented
Components	`RenderableComponent`, `SpatialCaptureComponent`, `MaterialInstanceOverrideComponent`, `AnimationStateComponent`, `LightComponent`, `TerrainComponent`, `WaterComponent`, `ReflectionProbeComponent`, `LocalEnvironmentVolumeComponent`, `DecalComponent`, `HairComponent`, `ParticleEmitterComponent`, `TextRenderableComponent`, `HighlightComponent`
SDK hosts	`ctx.terrain.heightAt`, `ctx.terrain.normalAt`, `ctx.terrain.raycastDown`, `ctx.terrain.sampleLayerWeights`, `ctx.terrain.slopeAt`, `ctx.water.isSubmerged`, `ctx.water.surfaceLevelAt`
Script IR nodes	`host.terrain.height_at`, `host.terrain.normal_at`, `host.terrain.raycast_down`, `host.terrain.sample_layer_weights`, `host.terrain.slope_at`, `host.water.is_submerged`, `host.water.surface_level_at`
Runtime systems	None
Replication	`AnimationStateComponent->public/low`, `DecalComponent->public/low`, `HairComponent->public/low`, `HighlightComponent->public/low`, `LightComponent->public/low`, `LocalEnvironmentVolumeComponent->public/low`, `MaterialInstanceOverrideComponent->public/low`, `ParticleEmitterComponent->public/low`, `ReflectionProbeComponent->public/low`, `RenderableComponent->public/low`, `SpatialCaptureComponent->public/low`, `TerrainComponent->public/low`, `TextRenderableComponent->public/low`, `WaterComponent->public/low`
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`projection_changed:RenderableComponent:within_tick`, `projection_changed:SpatialCaptureComponent:within_tick`, `component_patched:AnimationStateComponent:within_tick`
Test scenarios	`rendering.component_schema`

world.v1

Read-only world query through the canonical World.find filter atom and the paged World.query keyset-cursor atom.

Surface	Current declarations
Status	implemented
Components	`NavAgentComponent`
SDK hosts	`ctx.navigation.findPath`, `ctx.navigation.isReachable`, `ctx.navigation.nearestPoint`, `ctx.navigation.raycast`, `ctx.navigation.steerToward`, `ctx.world.find`, `ctx.world.query`
Script IR nodes	`host.navigation.find_path`, `host.navigation.is_reachable`, `host.navigation.nearest_point`, `host.navigation.raycast`, `host.navigation.steer_toward`, `host.world.find`, `host.world.query`
Runtime systems	None
Replication	`NavAgentComponent->public/medium`
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`host_call_made:World.find:within_tick`
Test scenarios	`world.query_snapshot`

worlds.v1

World teleport handoff issuance backed by Warehouse and target-room admission.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.world.teleportPlayer`
Script IR nodes	`host.world.teleport_player`
Runtime systems	`22:runtime.scriptSystem`
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	`worlds.teleport_authority:reject`
Expected side effects	`warehouse_write:warehouse_teleport_handoffs:within_tick`
Test scenarios	`worlds.teleport_handoff`

prefabs.v1

Project graph prefab schema, instantiation, overrides, nested prefab resolution, and provenance.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.world.spawn`, `ctx.world.spawnPrefab`
Script IR nodes	`host.world.spawn`, `host.world.spawn_prefab`
Runtime systems	`23:runtime.scriptSystem`
Replication	`TransformComponent->public/high`
Prediction	None
Lag compensation	None
Anti-cheat	`prefabs.parent_first:reject`
Expected side effects	`state_patch_emitted:entity.spawn:within_tick`
Test scenarios	`prefabs.instantiate_with_overrides`

platform.v1

Browser-mediated pointer lock and fullscreen request/exit atomics.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.platform.exitFullscreen`, `ctx.platform.exitPointerLock`, `ctx.platform.requestFullscreen`, `ctx.platform.requestPointerLock`
Script IR nodes	`host.platform.exit_fullscreen`, `host.platform.exit_pointer_lock`, `host.platform.request_fullscreen`, `host.platform.request_pointer_lock`
Runtime systems	None
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	`platform.user_gesture:reject`
Expected side effects	`host_call_made:Platform.requestPointerLock:within_tick`
Test scenarios	`platform.requests_buffer`

network.v1

Engine-dispatched network.message script event handling.

Surface	Current declarations
Status	implemented
Components	`NetworkProfileComponent`
SDK hosts	`ctx.network.sendMessage`
Script IR nodes	`event.network_message`, `host.network.send_message`
Runtime systems	None
Replication	`NetworkProfileComponent->public/high`
Prediction	None
Lag compensation	None
Anti-cheat	`network.channel_allowlist:reject`, `network.rate_limit:reject`
Expected side effects	`event_emitted:network.message:within_tick`
Test scenarios	`network.event_dispatch`

character.v1

Player and roster script hosts: read the live Player roster and possess, release, spawn, or eliminate a seat's Character through the one possession writer. Reach for it when a room script decides who controls which body.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.players.eliminate`, `ctx.players.get`, `ctx.players.list`, `ctx.players.possess`, `ctx.players.release`, `ctx.players.spawnCharacter`
Script IR nodes	`host.player.eliminate`, `host.player.possess`, `host.player.release`, `host.player.spawn_character`, `host.players.get`, `host.players.list`
Runtime systems	None
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`state_patch_emitted:player.possession_request:within_tick`, `event_emitted:character.spawned:within_tick`, `event_emitted:character.removed:within_tick`
Test scenarios	`character.possession_hosts`

ownership.v1

The Entity.setOwner script host that writes or clears the Profile that owns a thing, journaled and Room Script host only. Reach for it when a game hands a base, pet, or item to a Player as durable property.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.entity.setOwner`, `ctx.world.entityHasTag`, `ctx.world.setEntityOwner`, `ctx.world.setEntityTag`
Script IR nodes	`host.entity.set_owner`, `host.world.entity_has_tag`, `host.world.set_entity_owner`, `host.world.set_entity_tag`
Runtime systems	None
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`state_patch_emitted:entity.owner_set:within_tick`, `state_patch_emitted:entity.tag_add:within_tick`
Test scenarios	`ownership.owner_set`

commerce.v1

Commerce and inventory script hosts: prompt a purchase, read an entitlement, and grant an item through the durable authority outbox. Reach for it when a room script sells an offer or awards an item outside a purchase.

Surface	Current declarations
Status	implemented
Components	None
SDK hosts	`ctx.commerce.owns`, `ctx.commerce.promptPurchase`, `ctx.inventory.grant`
Script IR nodes	`host.commerce.owns`, `host.commerce.prompt_purchase`, `host.inventory.grant`
Runtime systems	None
Replication	None
Prediction	None
Lag compensation	None
Anti-cheat	None
Expected side effects	`state_patch_emitted:commerce.prompt_request:within_tick`, `state_patch_emitted:inventory.grant_request:within_tick`
Test scenarios	`commerce.host_ops`

Capability Pack Architecture