use bevy hierarchy system

models/src/dto/armour.rs

@@ -1,6 +1,6 @@
 use std::borrow::Cow;
 
-use bevy_ecs::{entity::Entity, world::World};
+use bevy_ecs::{prelude::*, relationship::RelatedSpawner};
 use strum::Display;
 
 use crate::{
@@ -186,8 +186,8 @@ impl ArmourDto {
             .collect()
     }
 
-    pub fn spawn(self, world: &mut World) -> Entity {
+    pub fn spawn(self, spawner: &mut RelatedSpawner<'_, ChildOf>) -> Entity {
-        let mut commands = world.spawn(draw_id());
+        let mut commands = spawner.spawn(draw_id());
 
         commands.insert((
             Name(self.name.to_string()),

models/src/dto/player.rs

@@ -52,19 +52,6 @@ pub struct PlayerDto {
 
 impl PlayerDto {
     pub fn spawn(self, world: &mut World) -> EntityWorldMut<'_> {
-        let primary = self.weapons.primary.map(|p| p.spawn(world));
-        let secondary = self.weapons.secondary.map(|s| s.spawn(world));
-        let melee = self.weapons.melee.map(|m| m.spawn(world));
-        let temporary = self.weapons.temporary.map(|m| m.spawn(world));
-        let fists = WeaponDto::FISTS.spawn(world);
-        let kick = WeaponDto::KITCHEN_KNIFE.spawn(world);
-
-        let head = self.armour.helmet.map(|a| a.spawn(world));
-        let torso = self.armour.body.map(|a| a.spawn(world));
-        let legs = self.armour.pants.map(|a| a.spawn(world));
-        let hands = self.armour.gloves.map(|a| a.spawn(world));
-        let feet = self.armour.boots.map(|a| a.spawn(world));
-
         let mut commands = world.spawn(draw_id());
 
         commands.insert((
@@ -85,7 +72,16 @@ impl PlayerDto {
             faction,
         });
 
-        commands.insert(Weapons {
+        let mut weapons = None;
+        commands.with_children(|spawner| {
+            let primary = self.weapons.primary.map(|p| p.spawn(spawner));
+            let secondary = self.weapons.secondary.map(|s| s.spawn(spawner));
+            let melee = self.weapons.melee.map(|m| m.spawn(spawner));
+            let temporary = self.weapons.temporary.map(|m| m.spawn(spawner));
+            let fists = WeaponDto::FISTS.spawn(spawner);
+            let kick = WeaponDto::KICK.spawn(spawner);
+
+            weapons = Some(Weapons {
                 primary,
                 secondary,
                 melee,
@@ -93,15 +89,32 @@ impl PlayerDto {
                 kick,
                 fists,
             });
+        });
+        if let Some(weapons) = weapons {
+            commands.insert(weapons);
+        }
 
-        commands.insert(PlayerArmour {
+        let mut armour = None;
+        commands.with_children(|spawner| {
+            let head = self.armour.helmet.map(|a| a.spawn(spawner));
+            let torso = self.armour.body.map(|a| a.spawn(spawner));
+            let legs = self.armour.pants.map(|a| a.spawn(spawner));
+            let hands = self.armour.gloves.map(|a| a.spawn(spawner));
+            let feet = self.armour.boots.map(|a| a.spawn(spawner));
+
+            armour = Some(PlayerArmour {
                 torso,
                 head,
                 legs,
                 feet,
                 hands,
+            })
         });
 
+        if let Some(armour) = armour {
+            commands.insert(armour);
+        }
+
         commands
     }
 }

models/src/dto/weapon.rs

@@ -1,6 +1,6 @@
 use std::borrow::Cow;
 
-use bevy_ecs::prelude::*;
+use bevy_ecs::{prelude::*, relationship::RelatedSpawner};
 
 use crate::{
     bundle::{
@@ -252,8 +252,8 @@ impl WeaponDto {
         })
     }
 
-    pub fn spawn(self, world: &mut World) -> Entity {
+    pub fn spawn(self, spawner: &mut RelatedSpawner<'_, ChildOf>) -> Entity {
-        let mut commands = world.spawn(draw_id());
+        let mut commands = spawner.spawn(draw_id());
 
         let verb = match self.kind {
             WeaponSlot::Primary | WeaponSlot::Secondary => WeaponVerb::Fired,

models/src/hierarchy.rs

@@ -1,178 +0,0 @@
-use bevy_ecs::{
-    prelude::*,
-    system::{Command, EntityCommands},
-};
-
-#[derive(Component, Debug, Clone, Copy)]
-pub struct Parent(Entity);
-
-impl Parent {
-    pub fn get(&self) -> Entity {
-        self.0
-    }
-}
-
-#[derive(Component, Debug, Clone, Default)]
-pub struct Children(Vec<Entity>);
-
-impl Children {
-    pub fn get(&self) -> &[Entity] {
-        &self.0
-    }
-}
-
-struct AddChild {
-    parent: Entity,
-    child: Entity,
-}
-
-impl Command for AddChild {
-    fn apply(self, world: &mut World) {
-        let mut parent = world.entity_mut(self.parent);
-        if let Some(mut children) = parent.get_mut::<Children>() {
-            children.0.push(self.child);
-        } else {
-            parent.insert(Children(vec![self.child]));
-        }
-    }
-}
-
-struct AddChildren {
-    parent: Entity,
-    children: Vec<Entity>,
-}
-
-impl Command for AddChildren {
-    fn apply(mut self, world: &mut World) {
-        let mut parent = world.entity_mut(self.parent);
-        if let Some(mut children) = parent.get_mut::<Children>() {
-            children.0.append(&mut self.children);
-        } else {
-            parent.insert(Children(self.children));
-        }
-    }
-}
-
-struct RemoveChild {
-    parent: Entity,
-    child: Entity,
-}
-
-impl Command for RemoveChild {
-    fn apply(self, world: &mut World) {
-        let mut parent = world.entity_mut(self.parent);
-        let mut children = parent
-            .get_mut::<Children>()
-            .expect("Parent component has no children");
-        children.0.retain(|child| *child != self.child);
-    }
-}
-
-pub trait HierarchyBuilder {
-    fn add_child(&mut self, child: Entity) -> &mut Self;
-
-    fn add_children(&mut self, children: impl AsRef<[Entity]>) -> &mut Self;
-
-    fn remove_child(&mut self, child: Entity) -> &mut Self;
-
-    fn set_parent(&mut self, parent: Entity) -> &mut Self;
-}
-
-impl<'a> HierarchyBuilder for EntityCommands<'a> {
-    fn add_child(&mut self, child: Entity) -> &mut Self {
-        let parent = self.id();
-        self.commands().queue(AddChild { parent, child });
-        self.commands().entity(child).insert(Parent(parent));
-        self
-    }
-
-    fn add_children(&mut self, children: impl AsRef<[Entity]>) -> &mut Self {
-        let children = children.as_ref();
-        let parent = self.id();
-        self.commands().queue(AddChildren {
-            parent,
-            children: children.to_owned(),
-        });
-        self.commands().insert_batch(
-            children
-                .iter()
-                .map(|e| (*e, Parent(parent)))
-                .collect::<Vec<_>>(),
-        );
-        self
-    }
-
-    fn remove_child(&mut self, child: Entity) -> &mut Self {
-        let parent = self.id();
-        self.commands().queue(RemoveChild { parent, child });
-        self.commands().entity(child).remove::<Parent>();
-        self
-    }
-
-    fn set_parent(&mut self, parent: Entity) -> &mut Self {
-        let child = self.id();
-        self.commands().queue(AddChild { parent, child });
-        self.commands().entity(child).insert(Parent(parent));
-        self
-    }
-}
-
-impl<'w> HierarchyBuilder for EntityWorldMut<'w> {
-    fn add_child(&mut self, child: Entity) -> &mut Self {
-        let parent_id = self.id();
-        unsafe {
-            self.world_mut()
-                .entity_mut(child)
-                .insert(Parent(parent_id))
-                .update_location();
-        }
-        if let Some(mut children) = self.get_mut::<Children>() {
-            children.0.push(child);
-            self
-        } else {
-            self.insert(Children(vec![child]))
-        }
-    }
-
-    fn add_children(&mut self, children: impl AsRef<[Entity]>) -> &mut Self {
-        let parent_id = self.id();
-        unsafe {
-            for child in children.as_ref() {
-                self.world_mut()
-                    .entity_mut(*child)
-                    .insert(Parent(parent_id))
-                    .update_location();
-            }
-        }
-        if let Some(mut old_children) = self.get_mut::<Children>() {
-            old_children.0.append(&mut children.as_ref().to_owned());
-            self
-        } else {
-            self.insert(Children(children.as_ref().to_owned()))
-        }
-    }
-
-    fn remove_child(&mut self, child: Entity) -> &mut Self {
-        unsafe {
-            self.world_mut()
-                .entity_mut(child)
-                .remove::<Parent>()
-                .update_location();
-        }
-        if let Some(mut children) = self.get_mut::<Children>() {
-            children.0.retain(|c| *c != child);
-        }
-        self
-    }
-
-    fn set_parent(&mut self, parent: Entity) -> &mut Self {
-        let child_id = self.id();
-        unsafe {
-            self.world_mut()
-                .entity_mut(parent)
-                .add_child(child_id)
-                .update_location()
-        }
-        self
-    }
-}

models/src/lib.rs

@@ -1,3 +1,2 @@
 pub mod bundle;
 pub mod dto;
-// pub mod hierarchy;

src/armour/mod.rs

@@ -1,18 +1,15 @@
 use bevy_ecs::prelude::*;
-use proxisim_models::{
+use proxisim_models::bundle::armour::{
-    bundle::armour::{
+    ArmourBodyPart, ArmourBodyPartSlot, ArmourBodyParts, ArmourCoverage, ArmourValue, ArmourVec,
-        ArmourBodyPart, ArmourBodyPartSlot, ArmourBodyParts, ArmourCoverage, ArmourValue,
+    BodyPartCoverage, Immunities, Immunity, PlayerArmour,
-        ArmourVec, BodyPartCoverage, Immunities, Immunity, PlayerArmour,
-    },
-    hierarchy::HierarchyBuilder,
 };
 use strum::IntoEnumIterator;
 
 use crate::{
+    Stages,
     player::status_effect::{
         ConcussionGrenade, FlashGrenade, PepperSpray, TearGas, TempDebuffImmunity,
     },
-    Stages,
 };
 
 fn generate_body_parts(
@@ -24,7 +21,7 @@ fn generate_body_parts(
         let mut parts = ArmourVec::<ArmourBodyPart>::default();
 
         for (armour, coverage, armour_value, immunities) in armour_q.iter_many(equipped_armour) {
-            commands.entity(armour).set_parent(player);
+            // commands.entity(player).add_child(armour);
 
             if let Some(immunities) = immunities {
                 let mut player = commands.entity(player);

src/effect.rs

@@ -1,10 +1,7 @@
 use std::{any::TypeId, collections::HashMap, sync::Mutex};
 
 use bevy_ecs::{prelude::*, system::SystemParam};
-use proxisim_models::{
+use proxisim_models::bundle::player::{Current, Defender, Player};
-    bundle::player::{Current, Defender, Player},
-    hierarchy::{HierarchyBuilder, Parent},
-};
 
 use crate::Stages;
 
@@ -77,13 +74,9 @@ impl<'w, 's> Effects<'w, 's> {
     ) -> Entity {
         let id = self.registry.type_map.get(&TypeId::of::<T>()).unwrap();
 
-        let spawned_effect = self
+        let spawned_effect = self.commands.spawn(effect).insert(*id).insert(addins).id();
-            .commands
+
-            .spawn(effect)
+        self.commands.entity(to).add_child(spawned_effect);
-            .insert(*id)
-            .insert(addins)
-            .set_parent(to)
-            .id();
 
         self.scheduled
             .create
@@ -202,7 +195,7 @@ pub(crate) fn run_effects(world: &mut World) {
         };
 
         for entity in entities {
-            let parent = world.entity(entity).get::<Parent>().unwrap().get();
+            let parent = world.entity(entity).get::<ChildOf>().unwrap().parent();
             world.entity_mut(parent).remove_child(entity);
             world.despawn(entity);
         }
@@ -277,12 +270,12 @@ fn mark_permanent_effects(effect_q: Query<Entity, With<EffectId>>, mut commands:
 }
 
 fn remove_transient_effects(
-    effect_q: Query<(Entity, &Parent), (With<EffectId>, Without<Permanent>)>,
+    effect_q: Query<(Entity, &ChildOf), (With<EffectId>, Without<Permanent>)>,
     mut commands: Commands,
 ) {
     for (effect, target) in effect_q.iter() {
         commands.entity(effect).despawn();
-        commands.entity(target.get()).remove_child(effect);
+        commands.entity(target.parent()).remove_child(effect);
     }
 }
 

src/entity_registry.rs

@@ -3,12 +3,11 @@ use std::collections::HashMap;
 use bevy_ecs::prelude::*;
 use proxisim_models::{
     bundle::{
+        Id, Name,
         player::{Attacker, Player},
         weapon::Weapon,
-        Id, Name,
     },
     dto::metrics::EntityInfo,
-    hierarchy::Parent,
 };
 
 use crate::Stages;
@@ -18,7 +17,7 @@ pub struct EntityRegistry(pub HashMap<Entity, EntityInfo>);
 
 fn read_entities(
     player_q: Query<(Entity, &Name, &Id, Has<Attacker>), With<Player>>,
-    weapon_q: Query<(Entity, &Parent, &Name, &Id), With<Weapon>>,
+    weapon_q: Query<(Entity, &ChildOf, &Name, &Id), With<Weapon>>,
     mut registry: ResMut<EntityRegistry>,
 ) {
     for (player, name, id, is_attacker) in player_q.iter() {
@@ -33,7 +32,7 @@ fn read_entities(
     }
 
     for (weapon, player, name, id) in weapon_q.iter() {
-        let (_, _, player_id, _) = player_q.get(player.get()).unwrap();
+        let (_, _, player_id, _) = player_q.get(player.parent()).unwrap();
         registry.0.insert(
             weapon,
             EntityInfo::Weapon {

src/hierarchy.rs

@@ -1,178 +0,0 @@
-use bevy_ecs::{
-    prelude::*,
-    system::{Command, EntityCommands},
-};
-
-#[derive(Component, Clone, Copy)]
-pub struct Parent(Entity);
-
-impl Parent {
-    pub fn get(&self) -> Entity {
-        self.0
-    }
-}
-
-#[derive(Component, Clone, Default)]
-pub struct Children(Vec<Entity>);
-
-impl Children {
-    pub fn get(&self) -> &[Entity] {
-        &self.0
-    }
-}
-
-struct AddChild {
-    parent: Entity,
-    child: Entity,
-}
-
-impl Command for AddChild {
-    fn apply(self, world: &mut World) {
-        let mut parent = world.entity_mut(self.parent);
-        if let Some(mut children) = parent.get_mut::<Children>() {
-            children.0.push(self.child);
-        } else {
-            parent.insert(Children(vec![self.child]));
-        }
-    }
-}
-
-struct AddChildren {
-    parent: Entity,
-    children: Vec<Entity>,
-}
-
-impl Command for AddChildren {
-    fn apply(mut self, world: &mut World) {
-        let mut parent = world.entity_mut(self.parent);
-        if let Some(mut children) = parent.get_mut::<Children>() {
-            children.0.append(&mut self.children);
-        } else {
-            parent.insert(Children(self.children));
-        }
-    }
-}
-
-struct RemoveChild {
-    parent: Entity,
-    child: Entity,
-}
-
-impl Command for RemoveChild {
-    fn apply(self, world: &mut World) {
-        let mut parent = world.entity_mut(self.parent);
-        let mut children = parent
-            .get_mut::<Children>()
-            .expect("Parent component has no children");
-        children.0.retain(|child| *child != self.child);
-    }
-}
-
-pub trait HierarchyBuilder {
-    fn add_child(&mut self, child: Entity) -> &mut Self;
-
-    fn add_children(&mut self, children: impl AsRef<[Entity]>) -> &mut Self;
-
-    fn remove_child(&mut self, child: Entity) -> &mut Self;
-
-    fn set_parent(&mut self, parent: Entity) -> &mut Self;
-}
-
-impl<'a> HierarchyBuilder for EntityCommands<'a> {
-    fn add_child(&mut self, child: Entity) -> &mut Self {
-        let parent = self.id();
-        self.commands().queue(AddChild { parent, child });
-        self.commands().entity(child).insert(Parent(parent));
-        self
-    }
-
-    fn add_children(&mut self, children: impl AsRef<[Entity]>) -> &mut Self {
-        let children = children.as_ref();
-        let parent = self.id();
-        self.commands().queue(AddChildren {
-            parent,
-            children: children.to_owned(),
-        });
-        self.commands().insert_batch(
-            children
-                .iter()
-                .map(|e| (*e, Parent(parent)))
-                .collect::<Vec<_>>(),
-        );
-        self
-    }
-
-    fn remove_child(&mut self, child: Entity) -> &mut Self {
-        let parent = self.id();
-        self.commands().queue(RemoveChild { parent, child });
-        self.commands().entity(child).remove::<Parent>();
-        self
-    }
-
-    fn set_parent(&mut self, parent: Entity) -> &mut Self {
-        let child = self.id();
-        self.commands().queue(AddChild { parent, child });
-        self.commands().entity(child).insert(Parent(parent));
-        self
-    }
-}
-
-impl<'w> HierarchyBuilder for EntityWorldMut<'w> {
-    fn add_child(&mut self, child: Entity) -> &mut Self {
-        let parent_id = self.id();
-        unsafe {
-            self.world_mut()
-                .entity_mut(child)
-                .insert(Parent(parent_id))
-                .update_location();
-        }
-        if let Some(mut children) = self.get_mut::<Children>() {
-            children.0.push(child);
-            self
-        } else {
-            self.insert(Children(vec![child]))
-        }
-    }
-
-    fn add_children(&mut self, children: impl AsRef<[Entity]>) -> &mut Self {
-        let parent_id = self.id();
-        unsafe {
-            for child in children.as_ref() {
-                self.world_mut()
-                    .entity_mut(*child)
-                    .insert(Parent(parent_id))
-                    .update_location();
-            }
-        }
-        if let Some(mut old_children) = self.get_mut::<Children>() {
-            old_children.0.append(&mut children.as_ref().to_owned());
-            self
-        } else {
-            self.insert(Children(children.as_ref().to_owned()))
-        }
-    }
-
-    fn remove_child(&mut self, child: Entity) -> &mut Self {
-        unsafe {
-            self.world_mut()
-                .entity_mut(child)
-                .remove::<Parent>()
-                .update_location();
-        }
-        if let Some(mut children) = self.get_mut::<Children>() {
-            children.0.retain(|c| *c != child);
-        }
-        self
-    }
-
-    fn set_parent(&mut self, parent: Entity) -> &mut Self {
-        let child_id = self.id();
-        unsafe {
-            self.world_mut()
-                .entity_mut(parent)
-                .add_child(child_id)
-                .update_location()
-        }
-        self
-    }
-}

src/log.rs

@@ -1,16 +1,13 @@
 use std::sync::Mutex;
 
 use bevy_ecs::{prelude::*, query::QuerySingleError, system::SystemParam};
-use proxisim_models::{
+use proxisim_models::bundle::{
-    bundle::{
     stat::{
-            AdditiveBonus, BaselineStat, ClipSize, Clips, CritRate, DamageBonus, Defence,
+        AdditiveBonus, BaselineStat, ClipSize, Clips, CritRate, DamageBonus, Defence, Dexterity,
-            Dexterity, EffectiveStat, MultiplicativeBonus, SimpleStatBaseline, SimpleStatBonus,
+        EffectiveStat, MultiplicativeBonus, SimpleStatBaseline, SimpleStatBonus,
         SimpleStatEffective, SimpleStatMarker, Speed, StatMarker, Strength, WeaponAccuracy,
     },
     weapon::WeaponVerb,
-    },
-    hierarchy::Children,
 };
 
 use crate::{Stages, entity_registry::EntityRegistry};
@@ -533,11 +530,11 @@ fn log_stat_changes<Stat: StatMarker>(
 ) {
     for (player, baseline, effective, children) in stat_q.iter() {
         let effects_add: Vec<_> = add_q
-            .iter_many(children.get())
+            .iter_many(children)
             .map(|bonus| (bonus.label, 100.0 * bonus.value))
             .collect();
         let effects_mult: Vec<_> = mult_q
-            .iter_many(children.get())
+            .iter_many(children)
             .map(|bonus| (bonus.label, 100.0 * bonus.value))
             .collect();
 
@@ -570,7 +567,7 @@ fn log_simple_stat_changes<Stat: SimpleStatMarker>(
 {
     for (target, baseline, effective, children) in stat_q.iter() {
         let bonuses: Vec<_> = bonus_q
-            .iter_many(children.get())
+            .iter_many(children)
             .map(|bonus| (bonus.label, Stat::denormalise_bonus(bonus.value)))
             .collect();
 

src/player/mod.rs

@@ -1,23 +1,18 @@
 use bevy_ecs::prelude::*;
-use proxisim_models::{
+use proxisim_models::bundle::{
-    bundle::{
     armour::{ArmourBodyPart, ArmourBodyParts},
     passive::{FactionUpgrades, Merits},
     player::{
-            Attacker, BodyPart, ChooseWeapon, CombatTurns, Current, CurrentTarget, Defeated,
+        Attacker, BodyPart, ChooseWeapon, CombatTurns, Current, CurrentTarget, Defeated, Defender,
-            Defender, FightEndType, Level, MaxHealth, PartDamageBonus, Player, PlayerStrategy,
+        FightEndType, Level, MaxHealth, PartDamageBonus, Player, PlayerStrategy, Weapons,
-            Weapons,
     },
     stat::{
         AmmoControl, Clips, CritRate, DamageBonus, Defence, Dexterity, EffectiveStat, Health,
         SimpleStatBundle, SimpleStatEffective, Speed, Strength, WeaponAccuracy,
     },
     weapon::{
-            Ammo, DamageStat, NeedsReload, NonTargeted, RateOfFire, Usable, Uses, Weapon,
+        Ammo, DamageStat, NeedsReload, NonTargeted, RateOfFire, Usable, Uses, Weapon, WeaponSlot,
-            WeaponSlot,
     },
-    },
-    hierarchy::Children,
 };
 use rand::Rng as _;
 
@@ -33,12 +28,12 @@ use crate::{
 pub mod stats;
 pub mod status_effect;
 
-fn select_weapon(
+fn select_weapon<'a>(
     weapons: &Weapons,
     slot: WeaponSlot,
     reload: bool,
-    usable_q: &Query<(Has<NeedsReload>, Option<&Children>), With<Usable>>,
+    usable_q: &'a Query<(Has<NeedsReload>, Option<&Children>), With<Usable>>,
-) -> Option<(Entity, Option<Children>)> {
+) -> Option<(Entity, Option<&'a Children>)> {
     let id = match slot {
         WeaponSlot::Primary => weapons.primary?,
         WeaponSlot::Secondary => weapons.secondary?,
@@ -53,7 +48,7 @@ fn select_weapon(
     if !reload && needs_reload {
         None
     } else {
-        Some((id, children.cloned()))
+        Some((id, children))
     }
 }
 
@@ -155,7 +150,7 @@ pub fn pick_action(
     let target = target_q.single().unwrap();
 
     if let Some(children) = children {
-        for effect in weapon_trigger_q.iter_many(children.get()) {
+        for effect in weapon_trigger_q.iter_many(children) {
             effect.trigger(&mut effects, current, target);
         }
     }
@@ -357,7 +352,7 @@ pub fn use_damaging_weapon(
 
             let mut dmg_bonus = dmg_bonus + p_dmg_bonus;
 
-            for part_bonus in part_bonus_q.iter_many(children.get()) {
+            for part_bonus in part_bonus_q.iter_many(children) {
                 if let Some(bonus) = part_bonus.dmg_bonus(body_part) {
                     dmg_bonus.value += bonus;
                 }
@@ -378,7 +373,7 @@ pub fn use_damaging_weapon(
             metrics.record_histogram(Some(weapon), "dmg", dmg);
 
             if dmg > 0 {
-                for effect in damage_proc_q.iter_many(children.get()) {
+                for effect in damage_proc_q.iter_many(children) {
                     match *effect {
                         DamageProcEffect::MultiTurn { value, bonus } => {
                             if multi_attack_proc.is_some() {

src/player/stats.rs

@@ -1,21 +1,18 @@
 use std::marker::PhantomData;
 
 use bevy_ecs::prelude::*;
-use proxisim_models::{
+use proxisim_models::bundle::stat::{
-    bundle::stat::{
     AdditiveBonus, AdditiveBonuses, AmmoControl, BaselineStat, ClipSize, Clips, CritRate,
     DamageBonus, Defence, Dexterity, EffectiveStat, Health, MultiplicativeBonus,
     MultiplicativeBonuses, SimpleStatBonus, SimpleStatEffective, SimpleStatMarker,
     SimpleStatSnapshot, Speed, StatMarker, StatSnapshot, Strength, WeaponAccuracy,
-    },
-    hierarchy::Parent,
 };
 
 use crate::Stages;
 
 fn add_additive_bonus<Stat: StatMarker>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(&AdditiveBonus<Stat>, &Parent)>,
+    effect_q: Query<(&AdditiveBonus<Stat>, &ChildOf)>,
     mut stat_q: Query<(
         &BaselineStat<Stat>,
         &mut AdditiveBonuses<Stat>,
@@ -24,7 +21,7 @@ fn add_additive_bonus<Stat: StatMarker>(
     )>,
 ) {
     for (bonus, player) in effect_q.iter_many(entities) {
-        let (baseline, mut add, mult, mut eff) = stat_q.get_mut(player.get()).unwrap();
+        let (baseline, mut add, mult, mut eff) = stat_q.get_mut(player.parent()).unwrap();
         add.factor += bonus.value;
         eff.value = baseline.value * add.factor * mult.factor;
     }
@@ -32,7 +29,7 @@ fn add_additive_bonus<Stat: StatMarker>(
 
 fn revert_additive_bonus<Stat: StatMarker>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(&AdditiveBonus<Stat>, &Parent)>,
+    effect_q: Query<(&AdditiveBonus<Stat>, &ChildOf)>,
     mut stat_q: Query<(
         &BaselineStat<Stat>,
         &mut AdditiveBonuses<Stat>,
@@ -41,7 +38,7 @@ fn revert_additive_bonus<Stat: StatMarker>(
     )>,
 ) {
     for (bonus, player) in effect_q.iter_many(entities) {
-        let (baseline, mut add, mult, mut eff) = stat_q.get_mut(player.get()).unwrap();
+        let (baseline, mut add, mult, mut eff) = stat_q.get_mut(player.parent()).unwrap();
         add.factor -= bonus.value;
         eff.value = baseline.value * add.factor * mult.factor;
     }
@@ -49,7 +46,7 @@ fn revert_additive_bonus<Stat: StatMarker>(
 
 fn add_multiplicative_bonus<Stat: StatMarker>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(&MultiplicativeBonus<Stat>, &Parent)>,
+    effect_q: Query<(&MultiplicativeBonus<Stat>, &ChildOf)>,
     mut stat_q: Query<(
         &BaselineStat<Stat>,
         &AdditiveBonuses<Stat>,
@@ -58,7 +55,7 @@ fn add_multiplicative_bonus<Stat: StatMarker>(
     )>,
 ) {
     for (bonus, player) in effect_q.iter_many(entities) {
-        let (baseline, add, mut mult, mut eff) = stat_q.get_mut(player.get()).unwrap();
+        let (baseline, add, mut mult, mut eff) = stat_q.get_mut(player.parent()).unwrap();
         mult.factor *= bonus.value;
         eff.value = baseline.value * add.factor * mult.factor;
     }
@@ -66,7 +63,7 @@ fn add_multiplicative_bonus<Stat: StatMarker>(
 
 fn revert_multiplicative_bonus<Stat: StatMarker>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(&MultiplicativeBonus<Stat>, &Parent)>,
+    effect_q: Query<(&MultiplicativeBonus<Stat>, &ChildOf)>,
     mut stat_q: Query<(
         &BaselineStat<Stat>,
         &AdditiveBonuses<Stat>,
@@ -75,7 +72,7 @@ fn revert_multiplicative_bonus<Stat: StatMarker>(
     )>,
 ) {
     for (bonus, player) in effect_q.iter_many(entities) {
-        let (baseline, add, mut mult, mut eff) = stat_q.get_mut(player.get()).unwrap();
+        let (baseline, add, mut mult, mut eff) = stat_q.get_mut(player.parent()).unwrap();
         mult.factor /= bonus.value;
         eff.value = baseline.value * add.factor * mult.factor;
     }
@@ -117,22 +114,22 @@ fn restore_stats<Stat: StatMarker>(
 
 fn apply_simple_stat_bonus<Stat: SimpleStatMarker>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(&SimpleStatBonus<Stat>, &Parent)>,
+    effect_q: Query<(&SimpleStatBonus<Stat>, &ChildOf)>,
     mut stat_q: Query<&mut SimpleStatEffective<Stat>>,
 ) {
     for (bonus, target) in effect_q.iter_many(&entities) {
-        let mut effective = stat_q.get_mut(target.get()).unwrap();
+        let mut effective = stat_q.get_mut(target.parent()).unwrap();
         effective.value = Stat::apply_bonus(effective.value, bonus.value);
     }
 }
 
 fn revert_simple_stat_bonus<Stat: SimpleStatMarker>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(&SimpleStatBonus<Stat>, &Parent)>,
+    effect_q: Query<(&SimpleStatBonus<Stat>, &ChildOf)>,
     mut stat_q: Query<&mut SimpleStatEffective<Stat>>,
 ) {
     for (bonus, target) in effect_q.iter_many(entities) {
-        let mut effective = stat_q.get_mut(target.get()).unwrap();
+        let mut effective = stat_q.get_mut(target.parent()).unwrap();
         effective.value = Stat::revert_bonus(effective.value, bonus.value);
     }
 }

src/player/status_effect.rs

@@ -1,11 +1,8 @@
 use std::{collections::VecDeque, marker::PhantomData};
 
 use bevy_ecs::prelude::*;
-use proxisim_models::{
+use proxisim_models::bundle::stat::{
-    bundle::stat::{
     AdditiveBonus, Defence, Dexterity, MultiplicativeBonus, Speed, StatMarker, Strength,
-    },
-    hierarchy::Parent,
 };
 use rand::Rng as _;
 
@@ -345,7 +342,7 @@ impl AdditiveStatusEffectMarker<2> for Frozen {
 
 fn apply_additive_status_effect<const N: usize, M: AdditiveStatusEffectMarker<N>>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(Entity, &Parent, &AdditiveStatusEffect<N, M>)>,
+    effect_q: Query<(Entity, &ChildOf, &AdditiveStatusEffect<N, M>)>,
     mut parent_q: Query<Option<&mut StatusEffectStack<M>>>,
     mut commands: Commands,
     mut effects: Effects,
@@ -353,15 +350,15 @@ fn apply_additive_status_effect<const N: usize, M: AdditiveStatusEffectMarker<N>
 ) {
     for (entity, player, effect) in effect_q.iter_many(entities) {
         log!(logger, "apply_status_effect", {
-            recipient: player.get(),
+            recipient: player.parent(),
             effect: std::any::type_name::<M>(),
         });
 
-        let stack = parent_q.get_mut(player.get()).unwrap();
+        let stack = parent_q.get_mut(player.parent()).unwrap();
 
         let new_effects = <M::AffectedStats as Stats<N>>::spawn_additive_effects(
             &mut effects,
-            player.get(),
+            player.parent(),
             M::factor() * (1.0 + effect.extra_effectiveness),
             std::any::type_name::<M>(),
         );
@@ -389,13 +386,13 @@ fn apply_additive_status_effect<const N: usize, M: AdditiveStatusEffectMarker<N>
 
 fn remove_additive_status_effect<const N: usize, M: AdditiveStatusEffectMarker<N>>(
     In(entities): In<Vec<Entity>>,
-    effect_q: Query<(Entity, &Parent)>,
+    effect_q: Query<(Entity, &ChildOf)>,
     mut parent_q: Query<Option<&mut StatusEffectStack<M>>>,
     linked_q: Query<&LinkedComponents<N>>,
     mut effects: Effects,
 ) {
     for (effect, player) in effect_q.iter_many(entities) {
-        if let Some(mut stack) = parent_q.get_mut(player.get()).unwrap()
+        if let Some(mut stack) = parent_q.get_mut(player.parent()).unwrap()
             && stack.effects.front() == Some(&effect)
         {
             stack.effects.pop_front();
@@ -412,8 +409,8 @@ fn remove_additive_status_effect<const N: usize, M: AdditiveStatusEffectMarker<N
 fn apply_temp_debuff_effect<Temp: DebuffingTempMarker>(
     In(entities): In<Vec<Entity>>,
     mut rng: ResMut<Rng>,
-    temp_q: Query<(Entity, &Parent, &AssociatedWeapon)>,
+    temp_q: Query<(Entity, &ChildOf, &AssociatedWeapon)>,
-    weapon_q: Query<&Parent>,
+    weapon_q: Query<&ChildOf>,
     mut parent_q: Query<(
         Option<&mut StatusEffectStack<Temp>>,
         Has<TempDebuffImmunity<Temp>>,
@@ -422,14 +419,14 @@ fn apply_temp_debuff_effect<Temp: DebuffingTempMarker>(
     mut logger: Logger,
 ) {
     for (effect, player, weapon) in temp_q.iter_many(entities) {
-        let (stack, immunity) = parent_q.get_mut(player.get()).unwrap();
+        let (stack, immunity) = parent_q.get_mut(player.parent()).unwrap();
         let user = weapon_q.get(weapon.0).unwrap();
         if immunity {
             commands.entity(effect).despawn();
-            commands.entity(player.get()).remove_child(effect);
+            commands.entity(player.parent()).remove_child(effect);
             log!(logger, "used_debuff_temp", {
-                actor: user.get(),
+                actor: user.parent(),
-                recipient: player.get(),
+                recipient: player.parent(),
                 weapon: weapon.0,
                 immune: true,
             });
@@ -447,7 +444,7 @@ fn apply_temp_debuff_effect<Temp: DebuffingTempMarker>(
 
         let bonus = effects.spawn(
             MultiplicativeBonus::<Temp::Stat>::new(std::any::type_name::<Temp>(), effective_factor),
-            player.get(),
+            player.parent(),
         );
 
         if let Some(mut stack) = stack {
@@ -456,7 +453,7 @@ fn apply_temp_debuff_effect<Temp: DebuffingTempMarker>(
             stack.effects.push_back(effect);
         } else {
             commands
-                .entity(player.get())
+                .entity(player.parent())
                 .insert(StatusEffectStack::<Temp> {
                     effects: VecDeque::from([effect]),
                     bonus,
@@ -465,8 +462,8 @@ fn apply_temp_debuff_effect<Temp: DebuffingTempMarker>(
         }
 
         log!(logger, "used_debuff_temp", {
-            actor: user.get(),
+            actor: user.parent(),
-            recipient: player.get(),
+            recipient: player.parent(),
             weapon: weapon.0,
             immune: false,
         });
@@ -475,14 +472,14 @@ fn apply_temp_debuff_effect<Temp: DebuffingTempMarker>(
 
 fn remove_temp_debuff_effect<Temp: DebuffingTempMarker>(
     In(entities): In<Vec<Entity>>,
-    temp_q: Query<&Parent>,
+    temp_q: Query<&ChildOf>,
     mut parent_q: Query<(&mut StatusEffectStack<Temp>, Has<TempDebuffImmunity<Temp>>)>,
     mut commands: Commands,
     _logger: Logger,
     mut effects: Effects,
 ) {
     for player in temp_q.iter_many(entities) {
-        let (mut stack, immunity) = parent_q.get_mut(player.get()).unwrap();
+        let (mut stack, immunity) = parent_q.get_mut(player.parent()).unwrap();
         if immunity {
             continue;
         }
@@ -501,13 +498,13 @@ fn remove_temp_debuff_effect<Temp: DebuffingTempMarker>(
                     std::any::type_name::<Temp>(),
                     effective_factor,
                 ),
-                player.get(),
+                player.parent(),
             );
 
             stack.effects.pop_front();
         } else {
             commands
-                .entity(player.get())
+                .entity(player.parent())
                 .remove::<StatusEffectStack<Temp>>();
         }
     }

src/weapon/bonus.rs

@@ -1,14 +1,11 @@
 use bevy_ecs::prelude::*;
-use proxisim_models::{
+use proxisim_models::bundle::{
-    bundle::{
     bonus::{BonusPartDamageBonus, BonusValue, WeaponBonusType},
     player::PartDamageBonus,
     stat::{
         AdditiveBonus, AmmoControl, Clips, CritRate, DamageBonus, SimpleStatBonus,
         SimpleStatEffective, Speed, Strength, WeaponAccuracy,
     },
-    },
-    hierarchy::{HierarchyBuilder, Parent},
 };
 
 use crate::{
@@ -197,7 +194,7 @@ impl BonusPartDamageBonus {
 } */
 
 pub(crate) fn prepare_bonuses(
-    bonus_q: Query<(&Parent, &WeaponBonusType, &BonusValue)>,
+    bonus_q: Query<(&ChildOf, &WeaponBonusType, &BonusValue)>,
     clips_q: Query<&SimpleStatEffective<Clips>>,
     mut effects: Effects,
     mut commands: Commands,
@@ -207,227 +204,227 @@ pub(crate) fn prepare_bonuses(
             WeaponBonusType::Berserk => {
                 effects.spawn(
                     SimpleStatBonus::<DamageBonus>::new("beserk", value.0 / 100.0),
-                    weapon.get(),
+                    weapon.parent(),
                 );
                 effects.spawn(
                     SimpleStatBonus::<WeaponAccuracy>::new("beserk", -value.0 / 2.0 / 50.0),
-                    weapon.get(),
+                    weapon.parent(),
                 );
             }
             WeaponBonusType::Conserve => {
                 effects.spawn(
                     SimpleStatBonus::<AmmoControl>::new("conserve", value.0 / 100.0),
-                    weapon.get(),
+                    weapon.parent(),
                 );
             }
             WeaponBonusType::Expose => {
                 effects.spawn(
                     SimpleStatBonus::<CritRate>::new("expose", (value.0 / 0.5) as u16),
-                    weapon.get(),
+                    weapon.parent(),
                 );
             }
             WeaponBonusType::Grace => {
                 effects.spawn(
                     SimpleStatBonus::<DamageBonus>::new("grace", -value.0 / 2.0 / 100.0),
-                    weapon.get(),
+                    weapon.parent(),
                 );
                 effects.spawn(
                     SimpleStatBonus::<WeaponAccuracy>::new("grace", value.0 / 50.0),
-                    weapon.get(),
+                    weapon.parent(),
                 );
             }
             WeaponBonusType::Powerful => {
                 effects.spawn(
                     SimpleStatBonus::<DamageBonus>::new("powerful", value.0 / 100.0),
-                    weapon.get(),
+                    weapon.parent(),
                 );
             }
             WeaponBonusType::Specialist => {
                 effects.spawn(
                     SimpleStatBonus::<DamageBonus>::new("specialist", value.0 / 100.0),
-                    weapon.get(),
+                    weapon.parent(),
                 );
 
-                if let Ok(clips) = clips_q.get(weapon.get()) {
+                if let Ok(clips) = clips_q.get(weapon.parent()) {
                     effects.spawn(
                         SimpleStatBonus::<Clips>::new("specialist", -(clips.value as i16)),
-                        weapon.get(),
+                        weapon.parent(),
                     );
                 }
             }
 
             WeaponBonusType::Empower => {
                 commands
-                    .spawn(TurnTriggeredEffect::Bonus {
+                    .entity(weapon.parent())
+                    .with_child(TurnTriggeredEffect::Bonus {
                         value: value.0,
                         bonus: TurnTriggeredBonus::Empower,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Quicken => {
                 commands
-                    .spawn(TurnTriggeredEffect::Bonus {
+                    .entity(weapon.parent())
+                    .with_child(TurnTriggeredEffect::Bonus {
                         value: value.0,
                         bonus: TurnTriggeredBonus::Quicken,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
 
             WeaponBonusType::Assassinate => {
                 commands
-                    .spawn(FirstTurnEffect::Bonus {
+                    .entity(weapon.parent())
+                    .with_child(FirstTurnEffect::Bonus {
                         value: value.0,
                         bonus: FirstTurnBonus::Assassinate,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
 
             WeaponBonusType::Blindfire => {
                 commands
-                    .spawn(DamageProcEffect::MultiTurn {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::MultiTurn {
                         value: value.0,
                         bonus: MultiTurnBonus::Blindfire,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Fury => {
                 commands
-                    .spawn(DamageProcEffect::MultiTurn {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::MultiTurn {
                         value: value.0,
                         bonus: MultiTurnBonus::Fury,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Rage => {
                 commands
-                    .spawn(DamageProcEffect::MultiTurn {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::MultiTurn {
                         value: value.0,
                         bonus: MultiTurnBonus::Rage,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::DoubleTap => {
                 commands
-                    .spawn(DamageProcEffect::MultiTurn {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::MultiTurn {
                         value: value.0,
                         bonus: MultiTurnBonus::DoubleTap,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
 
             WeaponBonusType::Achilles => {
                 commands
-                    .spawn(PartDamageBonus::WeaponBonus {
+                    .entity(weapon.parent())
+                    .with_child(PartDamageBonus::WeaponBonus {
                         value: value.0 / 100.0,
                         bonus: BonusPartDamageBonus::Achilles,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Cupid => {
                 commands
-                    .spawn(PartDamageBonus::WeaponBonus {
+                    .entity(weapon.parent())
+                    .with_child(PartDamageBonus::WeaponBonus {
                         value: value.0 / 100.0,
                         bonus: BonusPartDamageBonus::Cupid,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Crusher => {
                 commands
-                    .spawn(PartDamageBonus::WeaponBonus {
+                    .entity(weapon.parent())
+                    .with_child(PartDamageBonus::WeaponBonus {
                         value: value.0 / 100.0,
                         bonus: BonusPartDamageBonus::Crusher,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Deadeye => {
                 commands
-                    .spawn(PartDamageBonus::WeaponBonus {
+                    .entity(weapon.parent())
+                    .with_child(PartDamageBonus::WeaponBonus {
                         value: value.0 / 100.0,
                         bonus: BonusPartDamageBonus::Deadeye,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Throttle => {
                 commands
-                    .spawn(PartDamageBonus::WeaponBonus {
+                    .entity(weapon.parent())
+                    .with_child(PartDamageBonus::WeaponBonus {
                         value: value.0 / 100.0,
                         bonus: BonusPartDamageBonus::Throttle,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Roshambo => {
                 commands
-                    .spawn(PartDamageBonus::WeaponBonus {
+                    .entity(weapon.parent())
+                    .with_child(PartDamageBonus::WeaponBonus {
                         value: value.0 / 100.0,
                         bonus: BonusPartDamageBonus::Roshambo,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
 
             WeaponBonusType::Cripple => {
                 commands
-                    .spawn(DamageProcEffect::OpponentEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::OpponentEffect {
                         value: value.0,
                         bonus: OpponentStatusEffect::Cripple,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Demoralise => {
                 commands
-                    .spawn(DamageProcEffect::OpponentEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::OpponentEffect {
                         value: value.0,
                         bonus: OpponentStatusEffect::Demoralise,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Freeze => {
                 commands
-                    .spawn(DamageProcEffect::OpponentEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::OpponentEffect {
                         value: value.0,
                         bonus: OpponentStatusEffect::Freeze,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Slow => {
                 commands
-                    .spawn(DamageProcEffect::OpponentEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::OpponentEffect {
                         value: value.0,
                         bonus: OpponentStatusEffect::Slow,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Toxin => {
                 commands
-                    .spawn(DamageProcEffect::OpponentEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::OpponentEffect {
                         value: value.0,
                         bonus: OpponentStatusEffect::Toxin,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Weaken => {
                 commands
-                    .spawn(DamageProcEffect::OpponentEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::OpponentEffect {
                         value: value.0,
                         bonus: OpponentStatusEffect::Weaken,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
             WeaponBonusType::Wither => {
                 commands
-                    .spawn(DamageProcEffect::OpponentEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::OpponentEffect {
                         value: value.0,
                         bonus: OpponentStatusEffect::Wither,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
 
             WeaponBonusType::Motivate => {
                 commands
-                    .spawn(DamageProcEffect::SelfEffect {
+                    .entity(weapon.parent())
+                    .with_child(DamageProcEffect::SelfEffect {
                         value: value.0,
                         bonus: SelfStatusEffect::Motivate,
-                    })
+                    });
-                    .set_parent(weapon.get());
             }
 
             val => unimplemented!("{val:?}"),

src/weapon/mod.rs

@@ -1,6 +1,5 @@
 use bevy_ecs::prelude::*;
-use proxisim_models::{
+use proxisim_models::bundle::{
-    bundle::{
     passive::{Education, EducationPartDamageBonus, FactionUpgrades, Merits},
     player::{Current, PartDamageBonus, Weapons},
     stat::{
@@ -11,15 +10,13 @@ use proxisim_models::{
         Ammo, EquippedMods, Experience, Japanese, NeedsReload, Usable, Weapon, WeaponCategory,
         WeaponMod, WeaponSlot,
     },
-    },
-    hierarchy::{HierarchyBuilder, Parent},
 };
 
 use crate::{
+    Stages,
     effect::{Effects, TurnLimitedEffect},
     log,
     log::Logger,
-    Stages,
 };
 
 use self::bonus::{
@@ -157,25 +154,6 @@ pub enum DamageProcEffect {
     },
 }
 
-fn set_owner(weapons_q: Query<(Entity, &Weapons)>, mut commands: Commands) {
-    for (player, weapons) in weapons_q.iter() {
-        if let Some(primary) = weapons.primary {
-            commands.entity(primary).set_parent(player);
-        }
-        if let Some(secondary) = weapons.secondary {
-            commands.entity(secondary).set_parent(player);
-        }
-        if let Some(melee) = weapons.melee {
-            commands.entity(melee).set_parent(player);
-        }
-        if let Some(temp) = weapons.temporary {
-            commands.entity(temp).set_parent(player);
-        }
-        commands.entity(weapons.fists).set_parent(player);
-        commands.entity(weapons.kick).set_parent(player);
-    }
-}
-
 fn apply_passives(
     weapon_q: Query<(
         Entity,
@@ -184,7 +162,7 @@ fn apply_passives(
         &WeaponCategory,
         &WeaponSlot,
         Has<Japanese>,
-        &Parent,
+        &ChildOf,
     )>,
     player_q: Query<(&Merits, &Education, &FactionUpgrades)>,
     mut effects: Effects,
@@ -331,8 +309,8 @@ fn apply_passives(
                         weapon,
                     );
                     commands
-                        .spawn(TurnTriggeredEffect::Mod(TurnTriggeredMod::Bipod))
+                        .entity(weapon)
-                        .set_parent(weapon);
+                        .with_child(TurnTriggeredEffect::Mod(TurnTriggeredMod::Bipod));
                 }
                 WeaponMod::Tripod => {
                     effects.spawn(
@@ -340,40 +318,38 @@ fn apply_passives(
                         weapon,
                     );
                     commands
-                        .spawn(TurnTriggeredEffect::Mod(TurnTriggeredMod::Tripod))
+                        .entity(weapon)
-                        .set_parent(weapon);
+                        .with_child(TurnTriggeredEffect::Mod(TurnTriggeredMod::Tripod));
                 }
                 WeaponMod::SmallLight => {
                     commands
-                        .spawn(TurnTriggeredEffect::Mod(TurnTriggeredMod::SmallLight))
+                        .entity(weapon)
-                        .set_parent(weapon);
+                        .with_child(TurnTriggeredEffect::Mod(TurnTriggeredMod::SmallLight));
                 }
                 WeaponMod::PrecisionLight => {
                     commands
-                        .spawn(TurnTriggeredEffect::Mod(TurnTriggeredMod::PrecisionLight))
+                        .entity(weapon)
-                        .set_parent(weapon);
+                        .with_child(TurnTriggeredEffect::Mod(TurnTriggeredMod::PrecisionLight));
                 }
                 WeaponMod::TacticalIlluminator => {
-                    commands
+                    commands.entity(weapon).with_child(TurnTriggeredEffect::Mod(
-                        .spawn(TurnTriggeredEffect::Mod(
                         TurnTriggeredMod::TacticalIlluminator,
-                        ))
+                    ));
-                        .set_parent(weapon);
                 }
                 WeaponMod::AdjustableTrigger => {
                     commands
-                        .spawn(FirstTurnEffect::Mod(FirstTurnMod::AdjustableTrigger))
+                        .entity(weapon)
-                        .set_parent(weapon);
+                        .with_child(FirstTurnEffect::Mod(FirstTurnMod::AdjustableTrigger));
                 }
                 WeaponMod::HairTrigger => {
                     commands
-                        .spawn(FirstTurnEffect::Mod(FirstTurnMod::HairTrigger))
+                        .entity(weapon)
-                        .set_parent(weapon);
+                        .with_child(FirstTurnEffect::Mod(FirstTurnMod::HairTrigger));
                 }
             }
         }
 
-        let (merits, education, faction) = player_q.get(player.get()).unwrap();
+        let (merits, education, faction) = player_q.get(player.parent()).unwrap();
 
         let (mastery, edu_acc) = match cat {
             WeaponCategory::HeavyArtillery => (
@@ -445,10 +421,10 @@ fn apply_passives(
 
         if education.bio2380 {
             commands
-                .spawn(PartDamageBonus::Education(
+                .entity(weapon)
+                .with_child(PartDamageBonus::Education(
                     EducationPartDamageBonus::Bio2380,
-                ))
+                ));
-                .set_parent(weapon);
         }
 
         if mastery > 0 {
@@ -490,7 +466,7 @@ fn reload_weapon(
     mut weapon_q: Query<
         (
             Entity,
-            &Parent,
+            &ChildOf,
             &mut Ammo,
             &mut SimpleStatEffective<Clips>,
             &SimpleStatEffective<ClipSize>,
@@ -505,7 +481,7 @@ fn reload_weapon(
         clips.value -= 1;
 
         log!(logger, "reload_weapon", {
-            actor: player.get(),
+            actor: player.parent(),
             weapon
         });
 
@@ -530,18 +506,17 @@ fn restore_ammo(
 }
 
 fn apply_first_turn_effects(
-    effect_q: Query<(&Parent, &FirstTurnEffect)>,
+    effect_q: Query<(&ChildOf, &FirstTurnEffect)>,
-    player_q: Query<&Parent>,
+    player_q: Query<&ChildOf>,
     mut effects: Effects,
 ) {
     for (weapon, effect) in effect_q.iter() {
-        let player = player_q.get(weapon.get()).unwrap();
+        let player = player_q.get(weapon.parent()).unwrap();
-        effect.spawn(&mut effects, weapon.get(), player.get());
+        effect.spawn(&mut effects, weapon.parent(), player.parent());
     }
 }
 
 pub(crate) fn configure(stages: &mut Stages) {
-    stages.equip.add_systems(set_owner);
     // running this in the snapshot layer ensures that the stat increases aren't restored at the
     // end of the run
     stages.snapshot.add_systems(apply_first_turn_effects);