addressed review comments

assets/voxygen/i18n/en/command.ftl

@@ -84,6 +84,7 @@ command-repaired-items = Repaired all equipped items
 command-message-group-missing = You are using group chat but do not belong to a group. Use /world or
   /region to change chat.
 command-tell-request = { $sender } wants to talk to you.
+command-transform-invalid-presence = Cannot transform in the current presence
 
 # Unreachable/untestable but added for consistency
 

common/src/states/transform.rs

@@ -3,6 +3,7 @@ use std::time::Duration;
 use common_assets::AssetExt;
 use rand::thread_rng;
 use serde::{Deserialize, Serialize};
+use tracing::error;
 use vek::Vec3;
 
 use crate::{
@@ -65,6 +66,7 @@ impl CharacterBehavior for Data {
                 // Buildup finished, start transformation
                 } else {
                     let Ok(entity_config) = EntityConfig::load(&self.static_data.target) else {
+                        error!(?self.static_data.target, "Failed to load entity configuration");
                         end_ability(data, &mut update);
                         return update;
                     };

server/src/cmd.rs

@@ -672,9 +672,10 @@ fn handle_into_npc(
         TransformEntityError::UnexpectedNpcTeleporter => {
             Content::localized("command-unimplemented-teleporter-spawn")
         },
-    })?;
-
-    Ok(())
+        TransformEntityError::LoadingCharacter => {
+            Content::localized("command-transform-invalid-presence")
+        },
+    })
 }
 
 fn handle_make_npc(

server/src/events/entity_manipulation.rs

@@ -22,7 +22,7 @@ use common::{
         item::flatten_counted_items,
         loot_owner::LootOwnerKind,
         Alignment, Auras, Body, CharacterState, Energy, Group, Health, Inventory, Object, Player,
-        Poise, Pos, Presence, PresenceKind, SkillSet, Stats,
+        Poise, Pos, Presence, PresenceKind, SkillSet, Stats, BASE_ABILITY_LIMIT,
     },
     consts::TELEPORTER_RADIUS,
     event::{
@@ -2106,13 +2106,17 @@ pub fn handle_transform(server: &mut Server, TransformEvent(uid, info): Transfor
         return;
     };
 
-    let _ = transform_entity(server, entity, info);
+    if let Err(error) = transform_entity(server, entity, info) {
+        error!(?error, ?uid, "Failed transform entity");
+    }
 }
 
+#[derive(Debug)]
 pub enum TransformEntityError {
     EntityDead,
     UnexpectedNpcWaypoint,
     UnexpectedNpcTeleporter,
+    LoadingCharacter,
 }
 
 pub fn transform_entity(
@@ -2158,20 +2162,38 @@ pub fn transform_entity(
             }
 
             // Disable persistence
+            'persist: {
+                match server
+                    .state
+                    .ecs()
+                    .read_storage::<Presence>()
+                    .get(entity)
+                    .map(|presence| presence.kind)
                 {
+                    // Transforming while the character is being loaded or is spectating is invalid!
+                    Some(PresenceKind::Spectator | PresenceKind::LoadingCharacter(_)) => {
+                        return Err(TransformEntityError::LoadingCharacter);
+                    },
+                    Some(PresenceKind::Possessor | PresenceKind::Character(_)) => {},
+                    None => break 'persist,
+                }
+
                 // Run persistence once before disabling it
+                //
+                // We must NOT early return between persist_entity() being called and
+                // persistence being set to Possessor
                 super::player::persist_entity(server.state_mut(), entity);
 
-                // TODO: let Imbris work out some edge-cases:
-                // - error on PresenseKind::LoadingCharacter
-                // - handle active inventory actions
-                let ecs = server.state.ecs();
-                let mut presences = ecs.write_storage::<Presence>();
-                let presence = presences.get_mut(entity);
+                // We re-fetch presence here as mutable, because checking for a valid
+                // [`PresenceKind`] must be done BEFORE persist_entity but persist_entity needs
+                // exclusive mutable access to the server's state
+                let mut presences = server.state.ecs().write_storage::<Presence>();
+                let Some(presence) = presences.get_mut(entity) else {
+                    // Checked above
+                    unreachable!("We already know this entity has a Presence");
+                };
 
-                if let Some(presence) = presence
-                    && let PresenceKind::Character(id) = presence.kind
-                {
+                if let PresenceKind::Character(id) = presence.kind {
                     server.state.ecs().write_resource::<IdMaps>().remove_entity(
                         Some(entity),
                         None,
@@ -2194,6 +2216,16 @@ pub fn transform_entity(
             set_or_remove_component(server, entity, Some(body.density()))?;
             set_or_remove_component(server, entity, Some(body.collider()))?;
             set_or_remove_component(server, entity, Some(scale))?;
+            // Reset active abilities
+            set_or_remove_component(
+                server,
+                entity,
+                Some(if body.is_humanoid() {
+                    comp::ActiveAbilities::default_limited(BASE_ABILITY_LIMIT)
+                } else {
+                    comp::ActiveAbilities::default()
+                }),
+            )?;
 
             // Don't add Agent or ItemDrops to players
             if !is_player {

server/src/events/mod.rs

@@ -37,6 +37,7 @@ mod mounting;
 mod player;
 mod trade;
 
+/// Shared utilities used by other code **in this crate**
 pub(crate) mod shared {
     pub(crate) use super::{
         entity_manipulation::{transform_entity, TransformEntityError},

server/src/events/player.rs

@@ -243,11 +243,14 @@ pub fn handle_client_disconnect(
     Event::ClientDisconnected { entity }
 }
 
-// When a player logs out, their data is queued for persistence in the next tick
-// of the persistence batch update. The player will be
-// temporarily unable to log in during this period to avoid
-// the race condition of their login fetching their old data
-// and overwriting the data saved here.
+/// When a player logs out, their data is queued for persistence in the next
+/// tick of the persistence batch update. The player will be
+/// temporarily unable to log in during this period to avoid
+/// the race condition of their login fetching their old data
+/// and overwriting the data saved here.
+///
+/// This function is also used by the Transform event and MUST NOT assume that
+/// the persisting entity is deleted afterwards.
 pub(super) fn persist_entity(state: &mut State, entity: EcsEntity) -> EcsEntity {
     if let (
         Some(presence),