From 87d08f0151e643951769e323995f1c5ed89ee200 Mon Sep 17 00:00:00 2001
From: historia <[not public]>
Date: Fri, 18 Sep 2026 01:50:17 -0400
Subject: fix: harden economy recovery, shutdown concurrency, world validation,
 and inventory-loss paths

---
 internal/world/mob.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'internal/world')

diff --git a/internal/world/mob.go b/internal/world/mob.go
index a794bdd..b004643 100644
--- a/internal/world/mob.go
+++ b/internal/world/mob.go
@@ -665,7 +665,15 @@ func (s *MobStore) SpawnTransient(def *MobDef, cfg *behavior.SpawnMobConfig, roo
 	s.mu.Lock()
 	defer s.mu.Unlock()
 
-	instID := fmt.Sprintf("trigger_%s_%d_%d", cfg.ID, roomID, len(s.instances))
+	instID := ""
+	base := fmt.Sprintf("trigger_%s_%d", cfg.ID, roomID)
+	for n := 0; ; n++ {
+		candidate := fmt.Sprintf("%s_%d", base, n)
+		if _, exists := s.instances[candidate]; !exists {
+			instID = candidate
+			break
+		}
+	}
 	inst := NewMobInstance(def, instID, roomID, nil, 0)
 	inst.Owner = owner
 	inst.OwnerOnly = cfg.OwnerOnly
-- 
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