1 files changed, 63 insertions, 1 deletions

diff --git a/internal/validate/checks.go b/internal/validate/checks.go
index 1c87c67..6341108 100644
--- a/internal/validate/checks.go
+++ b/internal/validate/checks.go
@@ -9,6 +9,7 @@ import (
 	"sort"
 	"strings"
 
+	"gopkg.in/yaml.v3"
 	"thehouseoficarus/internal/behavior"
 	"thehouseoficarus/internal/casino"
 	"thehouseoficarus/internal/color"
@@ -132,6 +133,24 @@ func validateRooms(s Source) []Issue {
 						id, sp.ID),
 				})
 			}
+			// A non-positive quantity is silently skipped by every ground-item
+			// read path, so the spawn is dead content with no feedback.
+			if sp.Quantity <= 0 {
+				issues = append(issues, Issue{
+					Level: "ERROR",
+					Type:  "reference",
+					Message: fmt.Sprintf("Room %d: item spawn %q has quantity %d; it must be positive or the spawn can never appear",
+						id, sp.ID, sp.Quantity),
+				})
+			}
+			if sp.RespawnTicks < 0 {
+				issues = append(issues, Issue{
+					Level: "ERROR",
+					Type:  "reference",
+					Message: fmt.Sprintf("Room %d: item spawn %q has negative respawn_ticks %.1f",
+						id, sp.ID, sp.RespawnTicks),
+				})
+			}
 		}
 
 		var collEntries []roomObjEntry
@@ -1180,8 +1199,51 @@ func validateCourses(s Source) []Issue {
 	return issues
 }
 
+// validateFlagTriggerFiles validates every file-backed flag trigger under
+// data/triggers. A file that sets neither on_player_flag nor on_global_flag is
+// loaded but indexed nowhere and can never fire, so it is an ERROR; the steps
+// are checked for dangling references like any other trigger block.
+func validateFlagTriggerFiles(s Source) []Issue {
+	var issues []Issue
+	roomIndex := s.World.RoomIndex()
+	itemIDs := s.Items.IDSet()
+	mobIDs := s.Mobs.AllDefIDs()
+	dropIDs := dropTableIDSet(s.DataDir)
+	dir := filepath.Join(s.DataDir, "triggers")
+	if err := behavior.WalkYAMLDir(dir, func(path, id string, data []byte) error {
+		var t behavior.Trigger
+		if err := yaml.Unmarshal(data, &t); err != nil {
+			// validateKnownFields already reports the decode error.
+			return nil
+		}
+		rel := strings.TrimPrefix(filepath.ToSlash(path), filepath.ToSlash(s.DataDir)+"/")
+		if t.OnPlayerFlag == "" && t.OnGlobalFlag == "" {
+			issues = append(issues, Issue{
+				Level:   "ERROR",
+				Type:    "trigger",
+				Message: fmt.Sprintf("trigger %s: neither on_player_flag nor on_global_flag is set, so it is never indexed and can never fire", rel),
+			})
+			return nil
+		}
+		if t.Condition != nil {
+			issues = append(issues, validateCondition(rel, t.Condition, roomIndex, itemIDs)...)
+		}
+		for si := range t.Steps {
+			issues = append(issues, validateStep(fmt.Sprintf("%s: step[%d]", rel, si), &t.Steps[si], itemIDs, roomIndex, mobIDs, dropIDs)...)
+		}
+		return nil
+	}); err != nil {
+		issues = append(issues, Issue{
+			Level:   "ERROR",
+			Type:    "trigger",
+			Message: fmt.Sprintf("triggers: could not scan trigger files: %v", err),
+		})
+	}
+	return issues
+}
+
 // validateRoomTriggers validates the on_enter and on_exit trigger blocks on
-// every room. Flag-change triggers (data/triggers) are not validated here.
+// every room. Flag-change triggers (data/triggers) are validated separately.
 func validateRoomTriggers(s Source) []Issue {
 	var issues []Issue
 	roomIndex := s.World.RoomIndex()