diff --git a/skills/engineering/wayfinder/SKILL.md b/skills/engineering/wayfinder/SKILL.md
index 81d09dd..e2bfefc 100644
--- a/skills/engineering/wayfinder/SKILL.md
+++ b/skills/engineering/wayfinder/SKILL.md
@@ -117,7 +117,7 @@ User invokes with a loose idea.
 
 ### Work through the map
 
-User invokes with a map (URL or number). A ticket is **optional**: without one, you pick the next decision, not the user.
+User invokes with a map URL or a bare number. A bare number **always means the map's issue number in the forge**; load that issue as the map, never interpret the number as a ticket index or another parameter. A ticket is **optional**: without one, you pick the next decision, not the user.
 
 1. Load the **map**: the low-res view, not every ticket body.
 2. Choose the ticket. If the user named one, use it. Otherwise take the first frontier ticket in order. **Claim it**: assign it to yourself before any work.